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Class 11 Biotechnology Easy Quiz

Level 45 • 47/50 questions • 40 seconds per question.

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डीएनए काटने में मुख्य एंजाइम कौन से होते हैं?

Which enzymes are mainly used for cutting DNA?

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A. प्रतिबंध एंजाइमRestriction enzymes

Explanation

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प्रतिबंध एंजाइम डीएनए को खास स्थानों पर काटते हैं। परीक्षा में इन्हें molecular scissors याद रखें। / Restriction enzymes cut DNA at specific sites. In exams remember them as molecular scissors.

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डीएनए को विशिष्ट स्थान पर काटने वाले एंजाइम को क्या कहते हैं?

What is an enzyme that cuts DNA at a specific site called?

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B. प्रतिबंध एंडोन्यूक्लिएजRestriction endonuclease

Explanation

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Restriction endonuclease डीएनए के अंदर specific sequence पर cut लगाता है। यह recombinant DNA technology में जरूरी है। / A restriction endonuclease cuts inside DNA at a specific sequence. It is essential in recombinant DNA technology.

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प्रतिबंध एंजाइम डीएनए में किस bond को काटते हैं?

Which bond is cut by restriction enzymes in DNA?

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C. फॉस्फोडाइएस्टर bondPhosphodiester bond

Explanation

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Restriction enzymes DNA backbone के phosphodiester bonds को काटते हैं। इससे DNA fragments बनते हैं। / Restriction enzymes cut phosphodiester bonds in the DNA backbone. This forms DNA fragments.

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प्रतिबंध एंजाइम के लिए recognition site का अर्थ क्या है?

What does recognition site mean for a restriction enzyme?

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D. डीएनए की वह sequence जिसे enzyme पहचानता हैDNA sequence recognized by the enzyme

Explanation

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Recognition site वह specific DNA sequence है जहाँ enzyme bind और cut करता है। हर enzyme का site अलग हो सकता है। / A recognition site is the specific DNA sequence where an enzyme binds and cuts. Each enzyme may have a different site.

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Palindromic sequence का सही अर्थ क्या है?

What is the correct meaning of a palindromic sequence?

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A. दोनों strands पर opposite दिशा में समान पढ़ी जाने वाली sequenceA sequence read the same on both strands in opposite directions

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कई restriction enzymes palindromic sequences पहचानते हैं। इसे दोनों strands की symmetry से याद रखें। / Many restriction enzymes recognize palindromic sequences. Remember it by symmetry of both strands.

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EcoRI cutting से सामान्यतः किस प्रकार के ends बनते हैं?

What type of ends are generally produced by EcoRI cutting?

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C. sticky ends

Explanation

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EcoRI staggered cut लगाकर sticky ends बनाता है। Sticky ends ligation में मदद कर सकते हैं। / EcoRI makes staggered cuts producing sticky ends. Sticky ends can help in ligation.

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Blunt end का अर्थ क्या है?

What does blunt end mean?

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D. बिना overhang वाला सीधा DNA endStraight DNA end without overhang

Explanation

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Blunt ends में कोई single-stranded overhang नहीं होता। ये भी ligate हो सकते हैं पर sticky ends की तुलना में कठिन हो सकते हैं। / Blunt ends have no single-stranded overhang. They can ligate but may be harder than sticky ends.

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Sticky end का मुख्य लाभ क्या है?

What is the main advantage of a sticky end?

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A. complementary ends के साथ pairing आसान होती हैPairing with complementary ends becomes easier

Explanation

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Sticky ends complementary bases से pair कर सकते हैं। इसलिए recombinant DNA बनाने में ये उपयोगी हैं। / Sticky ends can pair by complementary bases. Therefore they are useful in making recombinant DNA.

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Staggered cut से क्या बनता है?

What is formed by a staggered cut?

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B. sticky ends with overhangs

Explanation

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Staggered cut DNA strands को अलग positions पर काटता है। इससे overhang वाले sticky ends बनते हैं। / A staggered cut cuts DNA strands at different positions. This forms sticky ends with overhangs.

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Straight cut से किस प्रकार के DNA ends बनते हैं?

What type of DNA ends are produced by a straight cut?

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C. blunt ends

Explanation

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Straight cut दोनों strands को same position पर काटता है। इससे blunt ends बनते हैं। / A straight cut cuts both strands at the same position. This produces blunt ends.

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Restriction enzyme का specific होना क्यों महत्वपूर्ण है?

Why is specificity of a restriction enzyme important?

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D. क्योंकि यह desired site पर DNA काटता हैBecause it cuts DNA at the desired site

Explanation

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Specificity से DNA predictable fragments में कटता है। Cloning strategy इसी पर निर्भर करती है। / Specificity cuts DNA into predictable fragments. Cloning strategy depends on this.

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डीएनए cutting के बाद बने टुकड़ों को क्या कहते हैं?

What are the pieces formed after DNA cutting called?

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A. डीएनए fragmentsDNA fragments

Explanation

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Restriction digestion के बाद DNA fragments बनते हैं। इन्हें gel electrophoresis से देखा जा सकता है। / After restriction digestion DNA fragments are formed. They can be seen by gel electrophoresis.

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Cutting of DNA के बाद fragments को अलग करने के लिए कौन सी तकनीक उपयोगी है?

Which technique is useful to separate fragments after cutting DNA?

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B. agarose gel electrophoresis

Explanation

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Agarose gel DNA fragments को size के आधार पर अलग करता है। यह digestion check करने में उपयोगी है। / Agarose gel separates DNA fragments by size. It is useful to check digestion.

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Restriction digestion mixture में buffer क्यों जरूरी है?

Why is buffer necessary in a restriction digestion mixture?

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C. enzyme के लिए सही pH और salt condition देने के लिएTo provide proper pH and salt condition for enzyme

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Restriction enzyme सही buffer में बेहतर काम करता है। गलत buffer digestion को कमजोर कर सकता है। / A restriction enzyme works better in the correct buffer. Wrong buffer can weaken digestion.

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Restriction enzyme reaction में temperature क्यों नियंत्रित किया जाता है?

Why is temperature controlled in a restriction enzyme reaction?

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D. enzyme activity को सही रखने के लिएTo maintain proper enzyme activity

Explanation

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हर enzyme का optimum temperature होता है। गलत temperature cutting efficiency घटा सकता है। / Each enzyme has an optimum temperature. Wrong temperature can reduce cutting efficiency.

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अधिकांश common restriction enzymes के लिए सामान्य incubation temperature क्या माना जाता है?

What is the common incubation temperature for many common restriction enzymes?

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A. लगभग 37 डिग्री सेल्सियसAbout 37 degrees Celsius

Explanation

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कई common restriction enzymes लगभग 37 डिग्री सेल्सियस पर काम करते हैं। हमेशा specific enzyme की condition देखें। / Many common restriction enzymes work around 37 degrees Celsius. Always check the specific enzyme condition.

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Restriction enzyme DNA में कहाँ cut लगाता है?

Where does a restriction enzyme cut DNA?

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B. specific recognition site परAt a specific recognition site

Explanation

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Restriction enzyme DNA की specific recognition sequence पहचानता है। फिर उसी site के पास cut लगाता है। / A restriction enzyme recognizes a specific DNA sequence. It then cuts at or near that site.

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Vector और insert को same restriction enzyme से काटने का लाभ क्या है?

What is the benefit of cutting vector and insert with the same restriction enzyme?

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D. compatible ends बन सकते हैंCompatible ends can form

Explanation

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Same enzyme compatible ends बना सकता है। इससे insert को vector में ligate करना आसान होता है। / The same enzyme can produce compatible ends. This makes ligating insert into vector easier.

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Compatible ends का अर्थ क्या है?

What does compatible ends mean?

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A. ऐसे DNA ends जो आपस में जुड़ सकते हैंDNA ends that can join with each other

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Compatible ends complementary overhangs या suitable blunt ends हो सकते हैं। ये ligation में मदद करते हैं। / Compatible ends may be complementary overhangs or suitable blunt ends. They help ligation.

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Incompatible ends का cloning में क्या प्रभाव होता है?

What is the effect of incompatible ends in cloning?

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B. joining कठिन या असंभव हो सकती हैJoining can be difficult or impossible

Explanation

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Incompatible ends आपस में properly pair नहीं कर पाते। इसलिए cloning strategy में enzyme choice जरूरी है। / Incompatible ends cannot pair properly. Therefore enzyme choice is important in cloning strategy.

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एक restriction enzyme के recognition site न होने पर क्या होगा?

What happens if a DNA molecule lacks the recognition site of a restriction enzyme?

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A. DNA उसी enzyme से specific तरीके से नहीं कटेगाDNA will not be specifically cut by that enzyme

Explanation

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Restriction enzyme अपने recognition site के बिना cut नहीं कर सकता। इसलिए sequence information important है। / A restriction enzyme cannot cut without its recognition site. Therefore sequence information is important.

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एक DNA molecule में enzyme site दो बार हो तो digestion के बाद क्या हो सकता है?

If an enzyme site occurs twice in a DNA molecule what can happen after digestion?

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C. तीन fragments बन सकते हैं if linear DNAThree fragments can form if DNA is linear

Explanation

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Linear DNA में दो cut sites होने पर तीन fragments बन सकते हैं। Fragment number site position पर निर्भर करता है। / In linear DNA two cut sites can produce three fragments. Fragment number depends on site positions.

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Circular plasmid पर एक restriction site हो तो digestion से क्या बनता है?

If a circular plasmid has one restriction site what is formed after digestion?

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D. linear plasmid

Explanation

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Circular plasmid एक site पर कटकर linear molecule बन सकता है। Gel पर supercoiled और linear forms अलग दिख सकते हैं। / A circular plasmid cut at one site can become a linear molecule. Supercoiled and linear forms can appear differently on gel.

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Circular plasmid पर दो अलग cut sites हों तो क्या बन सकता है?

What can form if a circular plasmid has two different cut sites?

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A. दो DNA fragmentsTwo DNA fragments

Explanation

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Circular DNA पर दो cuts generally दो fragments देते हैं। यह insert release या diagnostic digestion में उपयोगी है। / Two cuts on circular DNA generally give two fragments. This is useful for insert release or diagnostic digestion.

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Restriction digestion result देखने के लिए DNA ladder क्यों लगाई जाती है?

Why is a DNA ladder loaded to view restriction digestion results?

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B. fragment size estimate करने के लिएTo estimate fragment size

Explanation

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DNA ladder known size fragments देती है। इससे sample fragments का size estimate होता है। / A DNA ladder provides fragments of known sizes. This helps estimate sample fragment sizes.

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Restriction digestion के बाद gel पर band क्यों दिखते हैं?

Why do bands appear on a gel after restriction digestion?

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A. DNA fragments size के अनुसार अलग होते हैंDNA fragments separate according to size

Explanation

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Gel electrophoresis DNA fragments को size के अनुसार अलग करता है। Bands digestion pattern दिखाते हैं। / Gel electrophoresis separates DNA fragments by size. Bands show the digestion pattern.

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Small DNA fragments gel में सामान्यतः कैसे move करते हैं?

How do small DNA fragments generally move in a gel?

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B. बड़े fragments से अधिक दूरीMore distance than large fragments

Explanation

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छोटे fragments agarose gel में faster और farther move करते हैं। यह size separation का आधार है। / Small fragments move faster and farther in agarose gel. This is the basis of size separation.

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डीएनए cutting से पहले DNA purity क्यों important है?

Why is DNA purity important before DNA cutting?

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A. impurities enzyme को inhibit कर सकती हैंImpurities can inhibit the enzyme

Explanation

Simple Explanation

Phenol salt या ethanol जैसे contaminants enzyme activity घटा सकते हैं। Clean DNA digestion के लिए बेहतर है। / Contaminants such as phenol salt or ethanol can reduce enzyme activity. Clean DNA is better for digestion.

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Restriction digestion में DNA methylation क्या प्रभाव डाल सकती है?

What effect can DNA methylation have in restriction digestion?

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A. enzyme recognition या cutting को प्रभावित कर सकती हैIt can affect enzyme recognition or cutting

Explanation

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कुछ restriction enzymes methylated sites नहीं काटते। इसलिए methylation status digestion result बदल सकता है। / Some restriction enzymes do not cut methylated sites. Therefore methylation status can change digestion results.

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Bacteria अपने DNA को restriction enzyme से कैसे बचा सकते हैं?

How can bacteria protect their own DNA from restriction enzymes?

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B. methylation द्वाराBy methylation

Explanation

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Bacteria अपने recognition sites को methylate कर सकते हैं। इससे own DNA restriction enzyme से सुरक्षित रहता है। / Bacteria can methylate their recognition sites. This protects their own DNA from restriction enzymes.

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Restriction-modification system में restriction का काम क्या है?

What is the role of restriction in a restriction-modification system?

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A. foreign DNA को काटनाCutting foreign DNA

Explanation

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Restriction part foreign DNA को काट सकता है। Modification part host DNA को protect करता है। / The restriction part can cut foreign DNA. The modification part protects host DNA.

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Restriction-modification system में modification का मतलब क्या है?

What does modification mean in a restriction-modification system?

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C. host DNA को methylate करनाMethylating host DNA

Explanation

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Modification usually host DNA methylation से जुड़ी है। इससे host DNA cutting से बच सकता है। / Modification is usually linked with methylation of host DNA. This can protect host DNA from cutting.

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किस enzyme से blunt ends बन सकते हैं?

Which enzyme can produce blunt ends?

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A. SmaI जैसे enzymeEnzyme like SmaI

Explanation

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SmaI blunt end बनाने वाले enzyme का common example है। Enzyme type ends को determine करता है। / SmaI is a common example of a blunt-end producing enzyme. The enzyme type determines the ends.

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HindIII किससे जुड़ा है?

HindIII is linked with what?

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B. restriction digestion

Explanation

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HindIII एक restriction enzyme है। यह specific recognition site पर DNA काटता है। / HindIII is a restriction enzyme. It cuts DNA at a specific recognition site.

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BamHI का उपयोग किस काम में किया जाता है?

For what is BamHI used?

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A. DNA restriction cutting

Explanation

Simple Explanation

BamHI restriction enzyme है और DNA को specific site पर काटता है। यह cloning में उपयोगी हो सकता है। / BamHI is a restriction enzyme and cuts DNA at a specific site. It can be useful in cloning.

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Restriction digestion में enzyme quantity बहुत कम हो तो क्या हो सकता है?

What can happen if enzyme quantity is too low in restriction digestion?

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A. complete digestion नहीं हो सकतीComplete digestion may not occur

Explanation

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कम enzyme incomplete digestion दे सकता है। Reaction setup में enzyme amount important है। / Too little enzyme can give incomplete digestion. Enzyme amount is important in reaction setup.

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Restriction digestion में incubation time बहुत कम हो तो क्या हो सकता है?

What can happen if incubation time is too short in restriction digestion?

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B. incomplete digestion हो सकता हैIncomplete digestion can occur

Explanation

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कम समय में enzyme सभी sites नहीं काट पाएगा। उचित incubation digestion पूरा करने में मदद करती है। / With too little time the enzyme may not cut all sites. Proper incubation helps complete digestion.

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Restriction digestion में heat inactivation का क्या उद्देश्य हो सकता है?

What can be the purpose of heat inactivation in restriction digestion?

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C. enzyme activity रोकनाStopping enzyme activity

Explanation

Simple Explanation

कुछ enzymes heat treatment से inactive किए जा सकते हैं। इससे next step में unwanted cutting रुकती है। / Some enzymes can be inactivated by heat treatment. This stops unwanted cutting in the next step.

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Restriction enzyme को freezer में क्यों रखा जाता है?

Why are restriction enzymes stored in a freezer?

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C. enzyme को stable रखने के लिएTo keep enzyme stable

Explanation

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Restriction enzymes temperature-sensitive proteins हैं। Cold storage enzyme activity बचाने में मदद करता है। / Restriction enzymes are temperature-sensitive proteins. Cold storage helps preserve enzyme activity.

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Restriction enzyme tube को लंबे समय तक room temperature पर रखने से क्या समस्या हो सकती है?

What problem can occur if a restriction enzyme tube is kept at room temperature for long?

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A. enzyme activity घट सकती हैEnzyme activity can decrease

Explanation

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High temperature exposure enzyme को inactive कर सकता है। Enzyme को cold conditions में रखें। / High temperature exposure can inactivate the enzyme. Keep the enzyme in cold conditions.

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Restriction digestion control क्यों लगाया जाता है?

Why is a restriction digestion control used?

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A. result interpretation सही करने के लिएTo interpret results correctly

Explanation

Simple Explanation

Control से पता चलता है कि DNA और enzyme reaction सही चल रही है या नहीं। यह troubleshooting में मदद करता है। / A control shows whether DNA and enzyme reaction are working properly. It helps troubleshooting.

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Uncut DNA control किसलिए उपयोगी है?

Why is an uncut DNA control useful?

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A. cut pattern को original DNA form से compare करने के लिएTo compare cut pattern with original DNA form

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Uncut control दिखाता है कि DNA digestion से पहले कैसा दिखता था। इससे digestion success समझ आती है। / An uncut control shows how DNA looked before digestion. This helps understand digestion success.

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Restriction digestion में no-enzyme control क्या दिखाता है?

What does a no-enzyme control show in restriction digestion?

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A. enzyme के बिना DNA का patternDNA pattern without enzyme

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No-enzyme control uncut DNA pattern देता है। इससे enzyme cutting effect compare होता है। / A no-enzyme control gives the uncut DNA pattern. It helps compare the cutting effect of enzyme.

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DNA cutting के बाद desired fragment को gel से क्यों निकाला जा सकता है?

Why can a desired fragment be extracted from a gel after DNA cutting?

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A. cloning में use करने के लिएTo use it in cloning

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Gel extraction desired DNA fragment को बाकी fragments से अलग करता है। यह insert preparation में उपयोगी है। / Gel extraction separates the desired DNA fragment from other fragments. It is useful in insert preparation.

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Cutting of DNA का recombinant DNA technology में मुख्य role क्या है?

What is the main role of cutting DNA in recombinant DNA technology?

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A. DNA fragments और vector ends तैयार करनाPreparing DNA fragments and vector ends

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DNA cutting से insert और vector compatible रूप में तैयार किए जाते हैं। इसके बाद ligation step आता है। / DNA cutting prepares insert and vector in compatible form. Ligation comes after this step.

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Level 45 Cutting of DNA का सबसे अच्छा revision point क्या है?

What is the best revision point of Level 45 Cutting of DNA?

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A. restriction enzyme recognition site sticky end और gel check याद रखेंRemember restriction enzyme recognition site sticky end and gel check

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Cutting of DNA में specific enzyme DNA को predictable fragments में काटता है। Fragments को gel से check किया जाता है। / In Cutting of DNA a specific enzyme cuts DNA into predictable fragments. Fragments are checked by gel.

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डीएनए cutting का exam-safe summary क्या है?

What is the exam-safe summary of DNA cutting?

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A. restriction enzymes DNA को specific sites पर काटकर fragments बनाते हैंRestriction enzymes cut DNA at specific sites to make fragments

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Restriction enzymes molecular scissors की तरह काम करते हैं। Sticky या blunt ends recombinant DNA formation में उपयोगी होते हैं। / Restriction enzymes work like molecular scissors. Sticky or blunt ends are useful in recombinant DNA formation.

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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 47 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.