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Class 11 Biotechnology - Principles of Biotechnology - Competent Host Easy Quiz

Level 36 • 49/50 questions • 40 seconds per question.

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सक्षम होस्ट में बाहरी डीएनए प्रवेश कराने से पहले सबसे जरूरी तैयारी क्या है?

What is the most important preparation before introducing external DNA into a competent host?

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A. कोशिका को डीएनए uptake योग्य बनानाMaking the cell able to take up DNA

Explanation

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बाहरी डीएनए तभी आसानी से प्रवेश करता है जब होस्ट सक्षम हो। परीक्षा में competence को transformation की तैयारी मानें। / External DNA enters easily when the host is competent. In exams treat competence as preparation for transformation.

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किस स्थिति में होस्ट को सक्षम नहीं माना जाएगा?

In which condition will a host not be considered competent?

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C. जब वह डीएनए uptake न कर सकेWhen it cannot take up DNA

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जो होस्ट बाहरी डीएनए नहीं ले सकता उसे competent नहीं माना जाता। यह topic का basic negative case है। / A host that cannot take up external DNA is not considered competent. This is the basic negative case of the topic.

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सक्षम होस्ट में प्लास्मिड प्रवेश कराने के बाद पहला selection संकेत क्या हो सकता है?

What can be the first selection signal after plasmid entry into a competent host?

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A. एंटीबायोटिक plate पर colony growthColony growth on antibiotic plate

Explanation

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Antibiotic plate पर growth resistance marker का शुरुआती संकेत देती है। Insert confirmation के लिए अलग screening चाहिए। / Growth on an antibiotic plate gives an initial sign of a resistance marker. Separate screening is needed for insert confirmation.

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अगर plasmid में selectable marker नहीं है तो selection में क्या समस्या होगी?

What problem occurs in selection if a plasmid lacks a selectable marker?

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A. Transformants पहचानना कठिन होगाIdentifying transformants will be difficult

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Selectable marker transformed cells को पहचानने में मदद करता है। Marker न हो तो selection clear नहीं होती। / A selectable marker helps identify transformed cells. Without a marker selection is not clear.

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सक्षम होस्ट में plasmid के origin का मुख्य काम क्या है?

What is the main role of plasmid origin in a competent host?

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A. प्लास्मिड प्रतिकृति शुरू करानाStarting plasmid replication

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Origin of replication plasmid copies बनाने के लिए जरूरी है। यह host compatibility से जुड़ा होता है। / The origin of replication is needed to make plasmid copies. It is linked with host compatibility.

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यदि vector का marker host में express नहीं होता तो क्या होगा?

What happens if a vector marker does not express in the host?

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A. Selection सही तरह काम नहीं करेगीSelection will not work properly

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Marker को host में express होना चाहिए ताकि transformed cells चुनी जा सकें। Marker compatibility exam में important है। / The marker must express in the host so transformed cells can be selected. Marker compatibility is important in exams.

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Competent host में transformation के बाद recovery period क्यों रखा जाता है?

Why is a recovery period kept after transformation in a competent host?

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A. कोशिका को marker express करने और stress से उबरने के लिएTo let the cell express marker and recover from stress

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Transformation treatment cells को stress दे सकता है। Recovery marker expression और survival में मदद करती है। / Transformation treatment can stress cells. Recovery helps marker expression and survival.

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सक्षम होस्ट में colony बनने का सबसे सही अर्थ क्या है?

What is the most correct meaning of colony formation in a competent host?

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A. एक transformed cell की बढ़ी हुई populationA grown population from one transformed cell

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Colony आमतौर पर एक cell से बढ़ी population हो सकती है। इसलिए single colony clone analysis में काम आती है। / A colony can generally be a population grown from one cell. Therefore single colonies are useful in clone analysis.

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सक्षम होस्ट प्रयोग में single colony क्यों पसंद की जाती है?

Why is a single colony preferred in a competent host experiment?

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A. Pure clone culture पाने के लिएTo obtain a pure clone culture

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Single colony से एक clone की culture मिलती है। Mixed colonies result को confuse कर सकती हैं। / A single colony gives a culture of one clone. Mixed colonies can confuse results.

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Competent host में plasmid uptake और insert presence में क्या अंतर है?

What is the difference between plasmid uptake and insert presence in a competent host?

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A. Uptake vector entry है और insert presence recombinant confirmation हैUptake is vector entry and insert presence is recombinant confirmation

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Selection plasmid uptake दिखा सकती है लेकिन insert presence नहीं। Recombinant confirmation के लिए screening चाहिए। / Selection can show plasmid uptake but not insert presence. Screening is needed for recombinant confirmation.

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अगर antibiotic plate पर सभी cells grow कर रही हैं तो क्या समस्या हो सकती है?

If all cells are growing on an antibiotic plate what problem may exist?

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A. Selection कमजोर या antibiotic ineffective हो सकता हैSelection may be weak or antibiotic ineffective

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सभी cells की growth weak selection या contamination का संकेत हो सकती है। Control plates से कारण समझें। / Growth of all cells can indicate weak selection or contamination. Use control plates to understand the cause.

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सक्षम होस्ट में negative control का best result क्या होना चाहिए?

What should be the best result of a negative control in competent host work?

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A. Selection plate पर no growthNo growth on selection plate

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Negative control में plasmid नहीं होता। Selection plate पर growth न होना expected result है। / A negative control has no plasmid. No growth on a selection plate is the expected result.

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Positive control में known plasmid क्यों प्रयोग किया जाता है?

Why is a known plasmid used in a positive control?

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A. Competent cells और method check करने के लिएTo check competent cells and method

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Known plasmid transformation system की working दिखाता है। इससे failure का कारण पहचानना आसान होता है। / A known plasmid shows whether the transformation system works. This makes failure diagnosis easier.

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किस कारण competent cells की efficiency storage के दौरान घट सकती है?

Why can the efficiency of competent cells decrease during storage?

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A. गलत temperature या repeated thawingWrong temperature or repeated thawing

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Poor storage और repeated freeze-thaw cells को नुकसान पहुँचा सकते हैं। Aliquots efficiency बचाने में मदद करते हैं। / Poor storage and repeated freeze-thaw can damage cells. Aliquots help preserve efficiency.

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Transformation में gentle mixing क्यों बेहतर है?

Why is gentle mixing better in transformation?

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A. Competent cells को damage से बचाने के लिएTo protect competent cells from damage

Explanation

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Competent cells fragile हो सकती हैं। Gentle handling viability और competence को बचाता है। / Competent cells can be fragile. Gentle handling preserves viability and competence.

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Electroporation में high salt sample क्यों avoid किया जाता है?

Why is a high salt sample avoided in electroporation?

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A. Arcing और cell damage रोकने के लिएTo prevent arcing and cell damage

Explanation

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High salt electric pulse में arcing कर सकता है। Clean low-salt DNA electroporation में बेहतर होता है। / High salt can cause arcing during electric pulse. Clean low-salt DNA is better for electroporation.

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रासायनिक competence में divalent cations का role क्या है?

What is the role of divalent cations in chemical competence?

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A. DNA और cell surface के charge barrier को घटानाReducing charge barrier between DNA and cell surface

Explanation

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Divalent cations DNA uptake को आसान बना सकते हैं। Calcium ions इसका common example हैं। / Divalent cations can make DNA uptake easier. Calcium ions are a common example.

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किस condition में recombinant clone false positive हो सकता है?

In which condition can a recombinant clone be false positive?

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A. Empty vector marker के कारण select हो जाएEmpty vector is selected because of marker

Explanation

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Empty vector marker के कारण selection plate पर grow कर सकता है। Screening false positives हटाने में मदद करती है। / An empty vector can grow on a selection plate due to the marker. Screening helps remove false positives.

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Blue-white screening में white colony अक्सर किसका संकेत हो सकती है?

In blue-white screening what can a white colony often indicate?

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A. Insert disruption वाला recombinant cloneRecombinant clone with insert disruption

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lacZ disruption white colony का संकेत दे सकता है। फिर भी final confirmation molecular method से करें। / lacZ disruption can indicate a white colony. Still final confirmation should be done by molecular methods.

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Blue-white screening में blue colony सामान्यतः क्या बता सकती है?

In blue-white screening what can a blue colony generally indicate?

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A. Non-recombinant vector

Explanation

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Blue colony अक्सर intact lacZ के कारण non-recombinant vector दिखाती है। Screening result को confirmation से verify करें। / A blue colony often indicates non-recombinant vector due to intact lacZ. Verify screening results by confirmation.

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Competent host में colony PCR किस चीज की quick जाँच कर सकता है?

What can colony PCR quickly check in a competent host?

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A. Target insert की उपस्थितिPresence of target insert

Explanation

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Colony PCR selected colony में insert presence का quick test है। Final sequence check के लिए sequencing बेहतर है। / Colony PCR is a quick test for insert presence in a selected colony. Sequencing is better for final sequence check.

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Restriction analysis competent host work में क्यों किया जाता है?

Why is restriction analysis done in competent host work?

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A. Plasmid pattern और insert size check करने के लिएTo check plasmid pattern and insert size

Explanation

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Restriction digest expected band pattern दे सकता है। यह clone confirmation में उपयोगी है। / Restriction digest can give an expected band pattern. It is useful in clone confirmation.

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Sequencing competent host से मिले clone में क्या confirm कर सकती है?

What can sequencing confirm in a clone obtained from a competent host?

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A. Insert की exact sequenceExact sequence of insert

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Sequencing exact sequence और mutation status बता सकती है। यह final confirmation के लिए मजबूत method है। / Sequencing can show exact sequence and mutation status. It is a strong method for final confirmation.

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सक्षम होस्ट में plasmid stability किससे बढ़ सकती है?

What can increase plasmid stability in a competent host?

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A. उचित selection pressureProper selection pressure

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Selection pressure plasmid-containing cells को बनाए रखता है। इससे plasmid loss कम हो सकता है। / Selection pressure maintains plasmid-containing cells. This can reduce plasmid loss.

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अगर selection pressure न रहे तो transformed culture में क्या हो सकता है?

What can happen in a transformed culture if selection pressure is absent?

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A. Plasmid loss हो सकता हैPlasmid loss can occur

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Selection न हो तो कुछ cells plasmid खो सकती हैं। Maintenance के लिए suitable selection उपयोगी है। / Without selection some cells can lose the plasmid. Suitable selection is useful for maintenance.

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Competent host में high copy plasmid का possible drawback क्या है?

What is a possible drawback of a high copy plasmid in a competent host?

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A. Metabolic burden बढ़ सकता हैMetabolic burden can increase

Explanation

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High copy plasmid host resources पर extra load डाल सकता है। Toxic inserts में यह problem बढ़ सकती है। / A high copy plasmid can put extra load on host resources. This problem can increase with toxic inserts.

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Competent host में low copy plasmid कब बेहतर हो सकता है?

When can a low copy plasmid be better in a competent host?

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A. Toxic या unstable insert के लिएFor toxic or unstable insert

Explanation

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Low copy vector host burden कम कर सकता है। यह toxic या unstable inserts को maintain करने में मदद कर सकता है। / A low copy vector can reduce host burden. It can help maintain toxic or unstable inserts.

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Recombination-prone insert के लिए किस प्रकार का host उपयोगी हो सकता है?

Which type of host can be useful for a recombination-prone insert?

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A. Recombination-deficient host

Explanation

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Recombination-deficient host rearrangement risk घटा सकता है। Repeated sequences वाले inserts में यह उपयोगी है। / A recombination-deficient host can reduce rearrangement risk. It is useful for inserts with repeated sequences.

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Endonuclease activity कम होने से plasmid preparation में क्या लाभ हो सकता है?

What benefit can low endonuclease activity give in plasmid preparation?

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A. Plasmid DNA degradation कम हो सकती हैPlasmid DNA degradation can decrease

Explanation

Simple Explanation

Endonuclease-deficient host plasmid quality बेहतर रख सकता है। यह cloning strain का useful feature है। / An endonuclease-deficient host can keep plasmid quality better. This is a useful feature of cloning strains.

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Expression host में protease कम होना क्यों लाभकारी है?

Why is low protease activity beneficial in an expression host?

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A. Recombinant protein breakdown कम होगाRecombinant protein breakdown will decrease

Explanation

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Proteases expressed protein को degrade कर सकते हैं। Protease-deficient host protein stability बढ़ा सकता है। / Proteases can degrade expressed protein. A protease-deficient host can increase protein stability.

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Protein expression में inclusion bodies बनने का मुख्य कारण क्या हो सकता है?

What can be a main reason for inclusion body formation during protein expression?

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A. Protein misfolding और aggregationProtein misfolding and aggregation

Explanation

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Misfolded proteins insoluble aggregates बना सकते हैं। Lower temperature और chaperones मदद कर सकते हैं। / Misfolded proteins can form insoluble aggregates. Lower temperature and chaperones can help.

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Chaperone proteins expression host में किसलिए उपयोगी हैं?

Why are chaperone proteins useful in an expression host?

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A. Protein folding में सहायता के लिएTo help protein folding

Explanation

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Chaperones protein folding में मदद करते हैं। इससे soluble protein yield बेहतर हो सकती है। / Chaperones help protein folding. This can improve soluble protein yield.

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Lower expression temperature किस result को सुधार सकता है?

Lower expression temperature can improve which result?

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A. Protein solubility

Explanation

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कम temperature कुछ proteins को properly fold होने में मदद कर सकता है। इससे soluble fraction बढ़ सकती है। / Lower temperature can help some proteins fold properly. This can increase the soluble fraction.

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Plant transformation में regeneration step क्यों जरूरी हो सकता है?

Why can a regeneration step be needed in plant transformation?

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A. Transformed cell से पूरा plant बनाने के लिएTo make a whole plant from a transformed cell

Explanation

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Plant cells को transformed होने के बाद whole plant में regenerate करना पड़ सकता है। यह bacteria से अलग feature है। / Plant cells may need to regenerate into a whole plant after transformation. This is different from bacteria.

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Agrobacterium को plant biotechnology में natural genetic engineer क्यों कहा जाता है?

Why is Agrobacterium called a natural genetic engineer in plant biotechnology?

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A. क्योंकि यह plant cells में DNA transfer कर सकता हैBecause it can transfer DNA into plant cells

Explanation

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Agrobacterium T-DNA transfer की क्षमता रखता है। इसलिए यह plant transformation में important है। / Agrobacterium has T-DNA transfer ability. Therefore it is important in plant transformation.

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Animal cells में DNA introduction को अक्सर क्या कहा जाता है?

What is DNA introduction into animal cells often called?

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A. Transfection

Explanation

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Animal और other eukaryotic cells में DNA introduction को transfection कहा जाता है। Bacteria में transformation term common है। / DNA introduction into animal and other eukaryotic cells is called transfection. In bacteria transformation is common.

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Yeast host का एक advantage क्या है?

What is one advantage of a yeast host?

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A. कुछ eukaryotic processing कर सकता हैIt can perform some eukaryotic processing

Explanation

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Yeast एक eukaryotic host है। कुछ eukaryotic proteins के लिए यह bacterial host से बेहतर हो सकता है। / Yeast is a eukaryotic host. It can be better than bacterial hosts for some eukaryotic proteins.

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Mammalian host cell कब चुनना सही हो सकता है?

When can choosing a mammalian host cell be appropriate?

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A. Complex eukaryotic protein processing चाहिएComplex eukaryotic protein processing is needed

Explanation

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Mammalian cells complex proteins की processing में मदद कर सकती हैं। लेकिन उनका culture system जटिल हो सकता है। / Mammalian cells can help process complex proteins. But their culture system can be complex.

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Host range का cloning vector के लिए क्या अर्थ है?

What does host range mean for a cloning vector?

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A. वेक्टर किन hosts में काम कर सकता हैIn which hosts the vector can work

Explanation

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Host range vector की compatibility बताता है। Broad host range vector कई hosts में काम कर सकता है। / Host range indicates vector compatibility. A broad host range vector can work in many hosts.

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Broad host range vector का मुख्य लाभ क्या है?

What is the main advantage of a broad host range vector?

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A. यह कई species में replicate हो सकता हैIt can replicate in many species

Explanation

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Broad host range vector अधिक host options देता है। यह flexible cloning work में उपयोगी हो सकता है। / A broad host range vector gives more host options. It can be useful in flexible cloning work.

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Promoter compatibility expression host में क्यों जरूरी है?

Why is promoter compatibility necessary in an expression host?

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A. Host transcription machinery promoter को पहचान सकेHost transcription machinery can recognize the promoter

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Promoter को host machinery recognize करनी चाहिए। Otherwise gene expression कमजोर या absent हो सकता है। / The promoter must be recognized by host machinery. Otherwise gene expression can be weak or absent.

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Codon bias expression host में क्या असर डाल सकता है?

What effect can codon bias have in an expression host?

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A. Protein yield बदल सकता हैProtein yield can change

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Host preferred codons translation efficiency पर असर डालते हैं। Codon optimization expression बढ़ा सकता है। / Host-preferred codons affect translation efficiency. Codon optimization can improve expression.

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Inducible expression system toxic gene के लिए क्यों उपयोगी है?

Why is an inducible expression system useful for a toxic gene?

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A. Expression को जरूरत पड़ने पर चालू करने के लिएTo turn on expression only when needed

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Toxic gene का uncontrolled expression host को नुकसान दे सकता है। Inducible system expression control देता है। / Uncontrolled expression of a toxic gene can harm the host. An inducible system gives expression control.

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Constitutive expression किसे कहते हैं?

What is constitutive expression?

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A. Gene का लगातार express होनाContinuous expression of a gene

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Constitutive promoter gene को लगातार express करा सकता है। Toxic genes के लिए यह risky हो सकता है। / A constitutive promoter can express a gene continuously. This can be risky for toxic genes.

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Competent host work में biosafety का मुख्य उद्देश्य क्या है?

What is the main purpose of biosafety in competent host work?

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A. Safe handling और containmentSafe handling and containment

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Modified cells को safe guidelines के अनुसार handle करना चाहिए। Biosafety lab और environment protection से जुड़ी है। / Modified cells should be handled according to safe guidelines. Biosafety relates to lab and environmental protection.

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Genetically modified host को खुले environment में क्यों नहीं छोड़ना चाहिए?

Why should a genetically modified host not be released into the open environment?

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A. Environmental safety के लिए containment जरूरी हैContainment is needed for environmental safety

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GM host को controlled conditions में रखना चाहिए। Accidental release biosafety concern बन सकता है। / A GM host should be kept under controlled conditions. Accidental release can become a biosafety concern.

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Competent host waste को inactivate क्यों किया जाता है?

Why is competent host waste inactivated?

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A. Live modified cells को खत्म करने के लिएTo eliminate live modified cells

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Biological waste में live modified cells हो सकती हैं। Inactivation safe disposal का हिस्सा है। / Biological waste may contain live modified cells. Inactivation is part of safe disposal.

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Documentation competent host experiments में क्यों जरूरी है?

Why is documentation needed in competent host experiments?

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A. Traceability और reproducibility के लिएFor traceability and reproducibility

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Records strain plasmid marker और result track करते हैं। इससे experiment repeat और verify हो सकता है। / Records track strain plasmid marker and result. This allows the experiment to be repeated and verified.

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Level 36 Competent Host का best revision point क्या है?

What is the best revision point of Level 36 Competent Host?

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A. Competence uptake selection screening और safety linked हैंCompetence uptake selection screening and safety are linked

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Competent host workflow DNA uptake से clone confirmation तक चलता है। Safety और records भी important हैं। / The competent host workflow goes from DNA uptake to clone confirmation. Safety and records are also important.

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FAQs

Class 11 Biotechnology Quiz FAQs

How many questions are in this quiz?

This level is designed for 50 active questions. Currently 49 questions are available for the selected class and difficulty.

Is there a timer in this quiz?

Yes, the timer uses 40 seconds per question for Easy difficulty and shows the total remaining time on the page.

Can I open each question separately?

Yes, every question has its own SEO-friendly page with answer, explanation and related practice links.