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

Level 34 • 49/50 questions • 40 seconds per question.

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Competent host में transformation efficiency अधिक होने का लाभ क्या है?

What is the benefit of high transformation efficiency in a competent host?

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A. अधिक transformants मिल सकते हैंMore transformants can be obtained

Explanation

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High efficiency cells कम डीएनए से भी अधिक colonies दे सकती हैं। यह library construction में उपयोगी है। / High-efficiency cells can give more colonies even with low DNA. This is useful in library construction.

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Library construction में competent host की भूमिका क्या है?

What is the role of a competent host in library construction?

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A. अलग-अलग DNA fragments वाले vectors maintain करनाMaintaining vectors with different DNA fragments

Explanation

Simple Explanation

Library में अनेक DNA fragments vectors में clone होते हैं। Competent host उन्हें uptake और maintain करने में मदद करता है। / In a library many DNA fragments are cloned into vectors. A competent host helps take up and maintain them.

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Low transformation efficiency library पर क्या प्रभाव डाल सकती है?

What effect can low transformation efficiency have on a library?

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A. कुछ desired clones छूट सकते हैंSome desired clones may be missed

Explanation

Simple Explanation

Low efficiency से सभी fragments transform नहीं हो पाते। इससे library incomplete हो सकती है। / With low efficiency all fragments may not transform. This can make the library incomplete.

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Genomic library में competent host किसलिए जरूरी है?

Why is a competent host needed in a genomic library?

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A. Genome fragments वाले vectors रखने के लिएTo keep vectors carrying genome fragments

Explanation

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Genomic library में genome fragments vectors में रखे जाते हैं। Competent host इन recombinant vectors को maintain करता है। / In a genomic library genome fragments are kept in vectors. A competent host maintains these recombinant vectors.

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cDNA library में competent host क्या maintain करता है?

What does a competent host maintain in a cDNA library?

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A. cDNA-containing recombinant vectors

Explanation

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cDNA fragments vectors में clone किए जाते हैं। Competent host उन recombinant vectors को maintain करता है। / cDNA fragments are cloned into vectors. The competent host maintains those recombinant vectors.

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Library screening का मुख्य उद्देश्य क्या है?

What is the main purpose of library screening?

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A. Desired clone पहचाननाIdentifying the desired clone

Explanation

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Library में अनेक clones होते हैं। Screening desired gene वाले clone को खोजती है। / A library has many clones. Screening finds the clone carrying the desired gene.

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Hybridization screening में probe किससे bind करता है?

In hybridization screening what does a probe bind to?

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A. Complementary target sequence

Explanation

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Probe complementary sequence से bind करता है। इससे desired DNA वाले clone की पहचान हो सकती है। / A probe binds to a complementary sequence. This can identify a clone carrying desired DNA.

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Colony PCR का उपयोग किसलिए किया जाता है?

What is colony PCR used for?

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A. Selected colony में insert check करने के लिएTo check insert in a selected colony

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Colony PCR insert presence का quick संकेत देता है। Final confirmation के लिए sequencing उपयोगी हो सकती है। / Colony PCR gives a quick indication of insert presence. Sequencing can be useful for final confirmation.

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Master plate का उपयोग क्यों किया जाता है?

Why is a master plate used?

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A. Original colonies को सुरक्षित reference रखनाTo keep original colonies as a safe reference

Explanation

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Master plate से desired colony बाद में फिर pick की जा सकती है। Screening के दौरान original clone सुरक्षित रहता है। / A desired colony can be picked again from the master plate later. The original clone stays safe during screening.

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Replica plating किस काम में मदद करती है?

What does replica plating help with?

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A. Same colony pattern को नई plates पर transfer करनाTransferring same colony pattern to new plates

Explanation

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Replica plating colony identity बनाए रखते हुए अलग plates पर testing की सुविधा देती है। यह screening में उपयोगी है। / Replica plating allows testing on different plates while preserving colony identity. It is useful in screening.

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Single colony pick करने का मुख्य कारण क्या है?

What is the main reason to pick a single colony?

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A. Pure clone culture प्राप्त करनाTo obtain a pure clone culture

Explanation

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Single colony से एक clone की population बढ़ाई जा सकती है। इससे analysis अधिक reliable होता है। / A population of one clone can be grown from a single colony. This makes analysis more reliable.

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Mixed colony से क्या समस्या हो सकती है?

What problem can occur with a mixed colony?

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A. गलत plasmid analysis मिल सकता हैWrong plasmid analysis may result

Explanation

Simple Explanation

Mixed colonies में अलग clones हो सकते हैं। इससे plasmid result confusing हो सकता है। / Mixed colonies may contain different clones. This can make plasmid results confusing.

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Streaking का उपयोग किसलिए किया जाता है?

What is streaking used for?

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A. Isolated colonies पाने के लिएTo obtain isolated colonies

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Streaking dense culture से अलग colonies प्राप्त करने में मदद करता है। Pure clone selection में यह useful है। / Streaking helps obtain separate colonies from a dense culture. It is useful in pure clone selection.

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Miniprep के बाद कौन सा analysis common है?

Which analysis is common after miniprep?

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A. Restriction digestion या sequencingRestriction digestion or sequencing

Explanation

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Miniprep plasmid DNA देता है। फिर restriction digestion या sequencing से clone verify किया जाता है। / Miniprep gives plasmid DNA. Then the clone is verified by restriction digestion or sequencing.

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Restriction digest में expected bands मिलना क्या संकेत देता है?

What does getting expected bands in a restriction digest indicate?

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A. Correct clone हो सकता हैIt may be the correct clone

Explanation

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Expected bands vector map और insert size से match कर सकते हैं। यह correct clone का संकेत है। / Expected bands can match the vector map and insert size. This indicates a correct clone.

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Wrong band pattern क्या बता सकता है?

What can a wrong band pattern indicate?

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A. Wrong clone या rearrangementWrong clone or rearrangement

Explanation

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Wrong pattern insert absence wrong orientation या rearrangement का संकेत हो सकता है। Further confirmation करें। / A wrong pattern can indicate insert absence wrong orientation or rearrangement. Do further confirmation.

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Sequencing final confirmation क्यों देती है?

Why does sequencing give final confirmation?

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A. Insert की exact sequence बता सकती हैIt can tell the exact insert sequence

Explanation

Simple Explanation

Sequencing insert identity और mutation status दिखा सकती है। इसलिए यह reliable confirmation है। / Sequencing can show insert identity and mutation status. Therefore it is reliable confirmation.

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Mutation-free insert क्यों जरूरी है?

Why is a mutation-free insert important?

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A. Desired gene function सही रखने के लिएTo keep desired gene function correct

Explanation

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Mutation gene function या protein product बदल सकती है। इसलिए sequencing confirmation उपयोगी है। / A mutation can change gene function or protein product. Therefore sequencing confirmation is useful.

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Spontaneous mutation cloning result को कैसे प्रभावित कर सकती है?

How can spontaneous mutation affect cloning results?

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A. Insert या vector sequence बदल सकती हैIt can change insert or vector sequence

Explanation

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Mutation clone की sequence बदल सकती है। Final construct को verify करना जरूरी है। / A mutation can change the clone sequence. The final construct must be verified.

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Unwanted recombination cloning में क्यों समस्या है?

Why is unwanted recombination a problem in cloning?

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A. Insert rearrangement हो सकता हैInsert rearrangement can occur

Explanation

Simple Explanation

Unwanted recombination cloned DNA को बदल सकती है। Recombination-deficient host stability में मदद करता है। / Unwanted recombination can change cloned DNA. A recombination-deficient host helps stability.

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Repeated DNA sequences वाले insert में कौन सा risk अधिक हो सकता है?

What risk can be higher in an insert with repeated DNA sequences?

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A. Recombination से rearrangementRearrangement by recombination

Explanation

Simple Explanation

Repeated sequences recombination-prone हो सकती हैं। इसलिए suitable host strain जरूरी है। / Repeated sequences can be recombination-prone. Therefore a suitable host strain is important.

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Toxic insert maintain करने में कौन सी strategy मदद कर सकती है?

Which strategy can help maintain a toxic insert?

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A. Low-copy vector या controlled expressionLow-copy vector or controlled expression

Explanation

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Toxic insert host growth घटा सकता है। Low-copy या controlled expression burden कम कर सकते हैं। / A toxic insert can reduce host growth. Low-copy or controlled expression can reduce burden.

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Leaky expression toxic gene में क्यों problem है?

Why is leaky expression a problem in a toxic gene?

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A. बिना inducer के भी toxic protein बन सकता हैToxic protein can be made even without inducer

Explanation

Simple Explanation

Leaky expression host को नुकसान पहुँचा सकता है। Tight promoter control toxic genes में उपयोगी है। / Leaky expression can harm the host. Tight promoter control is useful for toxic genes.

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Promoter control competent host में क्यों उपयोगी है?

Why is promoter control useful in a competent host?

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A. Gene expression regulate करने के लिएTo regulate gene expression

Explanation

Simple Explanation

Promoter control high-burden या toxic genes की expression manage करता है। यह expression design का भाग है। / Promoter control manages expression of high-burden or toxic genes. It is part of expression design.

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Induction timing क्यों महत्वपूर्ण है?

Why is induction timing important?

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A. Cells sufficient growth के बाद expression शुरू करेंCells start expression after sufficient growth

Explanation

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बहुत जल्दी induction growth घटा सकती है। सही timing protein yield और cell health में मदद करती है। / Very early induction can reduce growth. Proper timing helps protein yield and cell health.

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Lower induction temperature कब मदद कर सकता है?

When can lower induction temperature help?

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A. Protein solubility और folding सुधारने मेंIn improving protein solubility and folding

Explanation

Simple Explanation

कम temperature कुछ proteins को बेहतर fold होने में मदद करता है। इससे insoluble aggregates कम हो सकते हैं। / Lower temperature helps some proteins fold better. This can reduce insoluble aggregates.

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Periplasmic expression क्यों उपयोगी हो सकता है?

Why can periplasmic expression be useful?

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A. कुछ proteins की folding में मदद कर सकता हैIt can help folding of some proteins

Explanation

Simple Explanation

Periplasm का environment कुछ proteins के folding में मदद कर सकता है। यह bacterial expression strategy है। / The periplasm environment can help folding of some proteins. It is a bacterial expression strategy.

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Secretion signal क्यों जोड़ा जा सकता है?

Why can a secretion signal be added?

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A. Protein को specific location या medium में भेजने के लिएTo send protein to a specific location or medium

Explanation

Simple Explanation

Secretion signal protein targeting में मदद करता है। इससे purification या folding में लाभ मिल सकता है। / A secretion signal helps protein targeting. This can benefit purification or folding.

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Protease activity expression host में क्यों problem हो सकती है?

Why can protease activity be a problem in an expression host?

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A. Recombinant protein degrade कर सकती हैIt can degrade recombinant protein

Explanation

Simple Explanation

Proteases expressed protein को तोड़ सकते हैं। Protease-deficient host yield बचाने में मदद करता है। / Proteases can break down expressed protein. A protease-deficient host helps protect yield.

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Disulfide bond वाले proteins के लिए क्या जरूरी हो सकता है?

What may be needed for proteins with disulfide bonds?

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A. Proper folding environment

Explanation

Simple Explanation

Disulfide bonds वाली proteins को सही folding environment चाहिए। Suitable host compartment या strain मदद कर सकता है। / Proteins with disulfide bonds need a proper folding environment. A suitable host compartment or strain can help.

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Soluble protein expression सुधारने का एक तरीका क्या हो सकता है?

What can be one way to improve soluble protein expression?

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A. Lower temperature या chaperone supportLower temperature or chaperone support

Explanation

Simple Explanation

Lower temperature और chaperones folding में मदद कर सकते हैं। इससे soluble protein yield बेहतर हो सकती है। / Lower temperature and chaperones can help folding. This can improve soluble protein yield.

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Autoclaving competent host disposal में क्यों किया जाता है?

Why is autoclaving done in competent host disposal?

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A. Live cells inactivate करने के लिएTo inactivate live cells

Explanation

Simple Explanation

Autoclaving biological waste में live microbes को inactivate कर सकता है। यह biosafety disposal का common तरीका है। / Autoclaving can inactivate live microbes in biological waste. It is a common biosafety disposal method.

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Spill management क्यों जरूरी है?

Why is spill management necessary?

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A. Modified cells के accidental spread को रोकने के लिएTo prevent accidental spread of modified cells

Explanation

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Spills को biosafety protocol से manage करना चाहिए। इससे contamination और exposure risk कम होता है। / Spills should be managed by biosafety protocol. This reduces contamination and exposure risk.

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Competent host records में क्या लिखना उपयोगी है?

What is useful to write in competent host records?

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A. Strain plasmid marker और dateStrain plasmid marker and date

Explanation

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Records traceability बनाए रखते हैं। Strain plasmid marker और date future tracking में मदद करते हैं। / Records maintain traceability. Strain plasmid marker and date help future tracking.

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Reproducibility का अर्थ क्या है?

What does reproducibility mean?

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A. Same conditions में similar results मिलनाGetting similar results under same conditions

Explanation

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Reproducibility experiment की reliability दिखाती है। Proper controls और records इसमें मदद करते हैं। / Reproducibility shows experiment reliability. Proper controls and records help it.

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Internal control क्यों useful होता है?

Why is an internal control useful?

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A. Procedure सही चल रही है या नहीं देखने के लिएTo see whether the procedure is working correctly

Explanation

Simple Explanation

Controls result interpretation में confidence देते हैं। बिना controls troubleshooting कठिन हो जाती है। / Controls give confidence in result interpretation. Without controls troubleshooting becomes difficult.

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किस result को suspicious माना जाएगा?

Which result will be considered suspicious?

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A. Negative control पर growth होGrowth occurs on negative control

Explanation

Simple Explanation

Negative control growth contamination या selection failure दिखा सकती है। इसे suspicious result माना जाएगा। / Growth on negative control can show contamination or selection failure. It will be considered suspicious.

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Positive control भी fail हो जाए तो क्या संभावना है?

What is likely if even the positive control fails?

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A. Cells या method में problemProblem with cells or method

Explanation

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Positive control failure competent cells या protocol की समस्या दिखाता है। Troubleshooting में यह key point है। / Positive control failure shows a problem with competent cells or protocol. This is a key point in troubleshooting.

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Test sample fail हो लेकिन positive control work करे तो क्या हो सकता है?

What can be possible if test sample fails but positive control works?

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A. Test DNA या construct problem हो सकती हैTest DNA or construct may have a problem

Explanation

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Positive control working बताता है कि cells competent हैं। Test DNA quality ligation या marker issue हो सकता है। / A working positive control shows cells are competent. Test DNA quality ligation or marker can be the issue.

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Too many background colonies का कारण क्या हो सकता है?

What can cause too many background colonies?

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A. Weak selection या contaminationWeak selection or contamination

Explanation

Simple Explanation

Background colonies weak antibiotic contamination या empty vector से आ सकती हैं। Screening और controls जरूरी हैं। / Background colonies can come from weak antibiotic contamination or empty vector. Screening and controls are necessary.

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किस कारण transformed colony में insert नहीं हो सकता?

Why may a transformed colony lack insert?

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A. Empty vector self-ligation

Explanation

Simple Explanation

Empty vector marker के कारण selected हो सकता है लेकिन insert नहीं रखता। इसे screening से पहचाना जाता है। / An empty vector can be selected due to the marker but lacks insert. It is identified by screening.

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Satellite colonies किस condition में दिख सकती हैं?

In which condition can satellite colonies appear?

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A. Antibiotic breakdown के आसपास sensitive cells grow करेंSensitive cells grow around antibiotic breakdown

Explanation

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कुछ antibiotics nearby resistant colony के कारण कम effective हो सकते हैं। इससे छोटी satellite colonies दिख सकती हैं। / Some antibiotics can become less effective near resistant colonies. This can produce small satellite colonies.

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Colony morphology देखने का उद्देश्य क्या हो सकता है?

What can be the purpose of observing colony morphology?

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A. Contamination या mixed colonies पहचाननाIdentifying contamination or mixed colonies

Explanation

Simple Explanation

Colony appearance contamination का संकेत दे सकती है। Insert confirmation के लिए molecular tests चाहिए। / Colony appearance can indicate contamination. Molecular tests are needed for insert confirmation.

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Final clone confirmation का मजबूत तरीका क्या है?

What is a strong method for final clone confirmation?

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A. DNA sequencing

Explanation

Simple Explanation

Sequencing insert identity orientation और mutations confirm कर सकती है। इसलिए यह final verification में मजबूत है। / Sequencing can confirm insert identity orientation and mutations. Therefore it is strong for final verification.

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Confirmed clone को glycerol stock में क्यों रखा जाता है?

Why is a confirmed clone kept in glycerol stock?

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A. Long-term preservation के लिएFor long-term preservation

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Glycerol stock clone को future use के लिए preserve करता है। इससे same clone फिर उपयोग हो सकता है। / A glycerol stock preserves the clone for future use. This allows the same clone to be used again.

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Glycerol stock में glycerol क्यों डाला जाता है?

Why is glycerol added in glycerol stock?

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A. Freezing damage से cells की रक्षा के लिएTo protect cells from freezing damage

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Glycerol cryoprotectant की तरह काम करता है। यह frozen storage में cells की survival में मदद करता है। / Glycerol works as a cryoprotectant. It helps cell survival during frozen storage.

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Clone stock label में क्या लिखना चाहिए?

What should be written on a clone stock label?

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A. Strain name plasmid marker और dateStrain name plasmid marker and date

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Clear labelling sample mix-up रोकती है। Strain plasmid marker और date future tracking में मदद करते हैं। / Clear labeling prevents sample mix-up. Strain plasmid marker and date help future tracking.

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Level 34 का exam-safe point क्या है?

What is the exam-safe point of Level 34?

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A. Efficiency screening confirmation और troubleshooting जुड़े हैंEfficiency screening confirmation and troubleshooting are connected

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Competent host workflow में uptake selection screening और confirmation जुड़े होते हैं। Controls result को reliable बनाते हैं। / In competent host workflow uptake selection screening and confirmation are connected. Controls make results reliable.

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Competent host lab logic का सही सार क्या है?

What is the correct summary of competent host lab logic?

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A. डीएनए enters host selected colonies screened और confirmed होती हैंDNA enters host selected colonies are screened and confirmed

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Competent host डीएनए uptake करता है। फिर selection screening और confirmation से सही clone चुना जाता है। / A competent host takes up DNA. Then the correct clone is chosen by selection screening and confirmation.

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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.