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Class 11 Biotechnology - Principles of Biotechnology - Ligase Enzymes Easy Quiz

Level 23 • 49/50 questions • 40 seconds per question.

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एक practical में cut vector और insert मिलाए गए। Stable joining के लिए क्या जोड़ना चाहिए?

In a practical cut vector and insert are mixed. What should be added for stable joining?

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A. डीएनए लाइगेजDNA ligase

Explanation

Simple Explanation

डीएनए लाइगेज cut vector और insert के बीच phosphodiester bond बनाता है। इससे stable recombinant DNA बन सकता है। / DNA ligase forms phosphodiester bonds between cut vector and insert. This can make stable recombinant DNA.

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अगर cloning mixture में ligase नहीं डाला गया तो क्या कमी रहेगी?

If ligase is not added to a cloning mixture what will be missing?

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B. permanent DNA joining

Explanation

Simple Explanation

Ligase न होने पर permanent phosphodiester joining नहीं होगी। Sticky ends केवल temporary pair कर सकते हैं। / Without ligase permanent phosphodiester joining will not occur. Sticky ends can only pair temporarily.

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कौन सा enzyme DNA fragments के बीच nick seal करता है?

Which enzyme seals nicks between DNA fragments?

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C. DNA ligase

Explanation

Simple Explanation

DNA ligase DNA fragments के बीच nick seal करता है। इसे DNA replication और cloning दोनों में याद रखें। / DNA ligase seals nicks between DNA fragments. Remember it in both DNA replication and cloning.

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लाइगेज किस step में उपयोगी है?

In which step is ligase useful?

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D. DNA fragments को जोड़नाJoining DNA fragments

Explanation

Simple Explanation

Ligase DNA fragments को जोड़ता है। DNA cutting restriction enzyme करता है। / Ligase joins DNA fragments. DNA cutting is done by restriction enzyme.

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किससे recombinant plasmid स्थिर बनता है?

What makes a recombinant plasmid stable?

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A. vector और insert के बीच phosphodiester bondPhosphodiester bond between vector and insert

Explanation

Simple Explanation

Ligase vector और insert के बीच phosphodiester bond बनाता है। यही recombinant plasmid को stable बनाता है। / Ligase forms a phosphodiester bond between vector and insert. This makes the recombinant plasmid stable.

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Sticky ends पहले किस प्रक्रिया से एक-दूसरे के पास आ सकते हैं?

By which process can sticky ends first come together?

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B. complementary base pairing

Explanation

Simple Explanation

Sticky ends में complementary overhangs होते हैं। वे पहले base pairing से पास आ सकते हैं और फिर ligase उन्हें जोड़ता है। / Sticky ends have complementary overhangs. They can first come together by base pairing and then ligase joins them.

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Blunt ends के साथ ligation क्यों कठिन हो सकती है?

Why can ligation with blunt ends be difficult?

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C. उनमें overhang नहीं होताThey have no overhang

Explanation

Simple Explanation

Blunt ends में complementary overhang नहीं होता। इसलिए sticky ends की तरह initial pairing support नहीं मिलता। / Blunt ends do not have complementary overhangs. Therefore they lack initial pairing support like sticky ends.

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T4 DNA ligase की energy requirement किस option में सही है?

Which option correctly gives energy requirement of T4 DNA ligase?

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D. ATP

Explanation

Simple Explanation

T4 DNA ligase ATP dependent enzyme है। यह ATP की ऊर्जा से DNA ends जोड़ता है। / T4 DNA ligase is ATP dependent. It joins DNA ends using energy from ATP.

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E coli DNA ligase को किस cofactor से अलग पहचान सकते हैं?

E coli DNA ligase can be distinguished by which cofactor?

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A. NAD plus

Explanation

Simple Explanation

E coli DNA ligase सामान्यतः NAD plus dependent होता है। T4 DNA ligase ATP dependent होता है। / E coli DNA ligase is generally NAD plus dependent. T4 DNA ligase is ATP dependent.

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किस enzyme का source T4 bacteriophage से जुड़ा है?

Which enzyme has its source linked with T4 bacteriophage?

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B. T4 DNA ligase

Explanation

Simple Explanation

T4 DNA ligase T4 bacteriophage से संबंधित है। यह cloning में commonly used joining enzyme है। / T4 DNA ligase is related to T4 bacteriophage. It is a commonly used joining enzyme in cloning.

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डीएनए ligase किस प्रकार के bond को repair या create करता है?

Which type of bond does DNA ligase repair or create?

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C. phosphodiester bond in DNA

Explanation

Simple Explanation

DNA ligase DNA backbone में phosphodiester bond repair या create करता है। यह DNA continuity के लिए जरूरी है। / DNA ligase repairs or creates phosphodiester bonds in the DNA backbone. It is needed for DNA continuity.

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किस option में ligase और Okazaki fragments का सही संबंध है?

Which option correctly relates ligase and Okazaki fragments?

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D. Ligase Okazaki fragments जोड़ता हैLigase joins Okazaki fragments

Explanation

Simple Explanation

Ligase Okazaki fragments जोड़ता है और lagging strand को continuous बनाता है। यह replication का important point है। / Ligase joins Okazaki fragments and makes the lagging strand continuous. This is an important point in replication.

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DNA ligase की absence में lagging strand पर क्या होगा?

What happens on the lagging strand in absence of DNA ligase?

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A. Okazaki fragments जुड़े नहीं रहेंगेOkazaki fragments will not remain joined

Explanation

Simple Explanation

Ligase absent होने पर Okazaki fragments के बीच nicks seal नहीं होंगे। इससे lagging strand incomplete रहेगा। / If ligase is absent nicks between Okazaki fragments will not be sealed. The lagging strand will remain incomplete.

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Ligase किसके बीच covalent bond बनाता है?

Ligase forms a covalent bond between what?

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A. 3 prime OH और 5 prime phosphate3 prime OH and 5 prime phosphate

Explanation

Simple Explanation

DNA ligase 3 prime OH और 5 prime phosphate के बीच covalent phosphodiester bond बनाता है। यही ligation का chemical basis है। / DNA ligase forms a covalent phosphodiester bond between 3 prime OH and 5 prime phosphate. This is the chemical basis of ligation.

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लाइगेज reaction में 5 prime phosphate हटाने से क्या असर हो सकता है?

What can be the effect of removing 5 prime phosphate in a ligase reaction?

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A. self-ligation घट सकती हैSelf-ligation can decrease

Explanation

Simple Explanation

Vector से 5 prime phosphate हटाने पर उसके अपने ends की joining घट सकती है। यह self-ligation control में मदद करता है। / Removing 5 prime phosphate from vector can reduce joining of its own ends. This helps control self-ligation.

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किस treatment से vector self-ligation कम की जा सकती है?

Which treatment can reduce vector self-ligation?

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A. alkaline phosphatase treatment

Explanation

Simple Explanation

Alkaline phosphatase vector ends से phosphate हटा सकता है। इससे vector self-ligation कम हो सकती है। / Alkaline phosphatase can remove phosphate from vector ends. This can reduce vector self-ligation.

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अगर vector dephosphorylated है तो insert ligation के लिए क्या महत्वपूर्ण हो सकता है?

If vector is dephosphorylated what may be important for insert ligation?

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A. insert के पास सही phosphate ends होंInsert has proper phosphate ends

Explanation

Simple Explanation

Dephosphorylated vector self-ligation घटाता है लेकिन proper insert ends ligation में मदद करते हैं। Chemical ends का ध्यान जरूरी है। / Dephosphorylated vector reduces self-ligation but proper insert ends help ligation. Chemical ends must be considered.

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Directional cloning में ligase किस चीज को जोड़ता है?

In directional cloning what does ligase join?

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A. compatible designed ends of insert and vector

Explanation

Simple Explanation

Directional cloning में अलग ends design किए जाते हैं। Ligase compatible insert और vector ends को जोड़ता है। / In directional cloning different ends are designed. Ligase joins compatible insert and vector ends.

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Directional cloning का ligation में लाभ क्या है?

What is the benefit of directional cloning in ligation?

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A. insert orientation control हो सकता हैInsert orientation can be controlled

Explanation

Simple Explanation

Directional cloning insert को desired orientation में जोड़ने में मदद करती है। Ligase फिर सही ends को स्थायी रूप से जोड़ता है। / Directional cloning helps join the insert in the desired orientation. Ligase then permanently joins the correct ends.

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Self-ligated vector में क्या missing हो सकता है?

What may be missing in a self-ligated vector?

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A. desired insert DNA

Explanation

Simple Explanation

Self-ligated vector अपने ends से बंद हो सकता है लेकिन desired insert नहीं होता। इसलिए यह cloning में unwanted हो सकता है। / A self-ligated vector may close with its own ends but lacks the desired insert. Therefore it can be unwanted in cloning.

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Ligase reaction में vector और insert का सही ratio क्यों जरूरी है?

Why is proper vector and insert ratio important in ligase reaction?

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A. desired recombinant molecule बनने की संभावना बढ़ाने के लिएTo increase chance of desired recombinant molecule formation

Explanation

Simple Explanation

Vector और insert का उचित अनुपात desired ligation को बेहतर कर सकता है। Too little insert से recombinant plasmid कम बन सकते हैं। / A proper vector and insert ratio can improve desired ligation. Too little insert can form fewer recombinant plasmids.

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Ligase reaction में बहुत अधिक vector और कम insert होने पर क्या risk है?

What is the risk if vector is high and insert is low in ligase reaction?

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A. desired recombinant कम बन सकते हैंDesired recombinants may be fewer

Explanation

Simple Explanation

कम insert से vector के साथ desired joining की संभावना घट सकती है। Ratio cloning experiments में practical factor है। / Low insert can reduce the chance of desired joining with vector. Ratio is a practical factor in cloning experiments.

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कौन सा factor ligation efficiency को प्रभावित कर सकता है?

Which factor can affect ligation efficiency?

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A. DNA end compatibility

Explanation

Simple Explanation

DNA ends compatible हों तो ligation आसान हो सकती है। Incompatible ends joining को कठिन बना सकते हैं। / If DNA ends are compatible ligation can be easier. Incompatible ends can make joining difficult.

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Ligase enzyme को cold condition में रखने का कारण क्या है?

Why is ligase enzyme kept in cold condition?

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A. enzyme activity preserve करने के लिएTo preserve enzyme activity

Explanation

Simple Explanation

Ligase protein enzyme है और heat से inactive हो सकता है। Cold condition activity बचाने में मदद करती है। / Ligase is a protein enzyme and can become inactive by heat. Cold condition helps preserve activity.

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किस option में ligase reaction failure का सही कारण है?

Which option gives a correct reason for ligase reaction failure?

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A. inactive enzyme

Explanation

Simple Explanation

Inactive enzyme bond formation नहीं कर सकता। Compatible ends proper buffer और ATP ligation में मदद करते हैं। / Inactive enzyme cannot form bonds. Compatible ends proper buffer and ATP help ligation.

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अगर ligase mixture में ATP न हो और enzyme T4 ligase हो तो क्या हो सकता है?

If a ligase mixture lacks ATP and the enzyme is T4 ligase what may happen?

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A. ligation कमजोर या असफल हो सकती हैLigation may be weak or fail

Explanation

Simple Explanation

T4 DNA ligase ATP dependent होता है। ATP न होने पर bond formation प्रभावित हो सकती है। / T4 DNA ligase is ATP dependent. Without ATP bond formation can be affected.

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Ligase reaction में proper buffer न हो तो क्या परिणाम हो सकता है?

What can happen if proper buffer is absent in ligase reaction?

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A. enzyme activity घट सकती हैEnzyme activity may decrease

Explanation

Simple Explanation

Proper buffer ligase को सही pH और salt conditions देता है। गलत conditions activity घटा सकती हैं। / Proper buffer gives ligase correct pH and salt conditions. Wrong conditions can reduce activity.

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किस option में ligase और Mg ion का सही संबंध है?

Which option correctly relates ligase and Mg ion?

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A. Mg ion enzyme activity में cofactor की तरह मदद कर सकता हैMg ion can help enzyme activity as a cofactor

Explanation

Simple Explanation

कई ligation buffers में magnesium ions enzyme activity के लिए होते हैं। Practical conditions में cofactors महत्वपूर्ण हो सकते हैं। / Many ligation buffers contain magnesium ions for enzyme activity. Cofactors can be important in practical conditions.

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Ligase reaction में बहुत अधिक heat का क्या असर हो सकता है?

What can be the effect of too much heat in ligase reaction?

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A. ligase denature होकर inactive हो सकता हैLigase can denature and become inactive

Explanation

Simple Explanation

Ligase protein enzyme है और अधिक heat से denature हो सकता है। इससे ligation efficiency घट सकती है। / Ligase is a protein enzyme and can denature at high heat. This can reduce ligation efficiency.

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कौन सा option ligase के role को replication और cloning दोनों से जोड़ता है?

Which option links ligase role with both replication and cloning?

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A. Okazaki fragments और vector-insert joiningOkazaki fragments and vector-insert joining

Explanation

Simple Explanation

Replication में ligase Okazaki fragments जोड़ता है और cloning में vector-insert जोड़ता है। यही दो मुख्य contexts हैं। / In replication ligase joins Okazaki fragments and in cloning it joins vector-insert. These are two main contexts.

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कौन सा option ligase और DNA repair की सही बात है?

Which option is correct about ligase and DNA repair?

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A. ligase DNA strand में break seal कर सकता हैLigase can seal a break in DNA strand

Explanation

Simple Explanation

DNA repair में ligase strand nick या break को seal करने में मदद कर सकता है। इससे genome stability बनी रहती है। / In DNA repair ligase can help seal a strand nick or break. This maintains genome stability.

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Ligase किस तरह DNA continuity बनाता है?

How does ligase maintain DNA continuity?

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A. backbone nick seal करकेBy sealing backbone nick

Explanation

Simple Explanation

Ligase DNA backbone में निक को seal करता है। इससे DNA strand continuous बनता है। / Ligase seals nicks in the DNA backbone. This makes the DNA strand continuous.

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किस option में ligase और nick का correct relation है?

Which option correctly relates ligase and nick?

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A. ligase nick seal करता हैLigase seals the nick

Explanation

Simple Explanation

Nick DNA backbone में छोटा टूटाव है। Ligase इसे seal करके continuity restore करता है। / A nick is a small break in DNA backbone. Ligase seals it and restores continuity.

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कौन सा option ligase और energy source का सही comparison है?

Which option correctly compares ligase and energy source?

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A. T4 ligase ATP और E coli ligase NAD plusT4 ligase ATP and E coli ligase NAD plus

Explanation

Simple Explanation

T4 DNA ligase ATP dependent और E coli DNA ligase सामान्यतः NAD plus dependent है। यह common comparison है। / T4 DNA ligase is ATP dependent and E coli DNA ligase is generally NAD plus dependent. This is a common comparison.

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Ligase enzyme किस broad enzyme class की idea से मेल खाता है?

Ligase enzyme matches the idea of which broad enzyme class?

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A. molecules को जोड़ने वाले enzymesEnzymes that join molecules

Explanation

Simple Explanation

Ligases ऊर्जा की मदद से molecules को जोड़ने वाले enzymes हैं। DNA ligase DNA ends जोड़ता है। / Ligases are enzymes that join molecules using energy. DNA ligase joins DNA ends.

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कौन सा option ligase का wrong role देता है?

Which option gives a wrong role of ligase?

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D. DNA को restriction site पर काटनाCutting DNA at restriction site

Explanation

Simple Explanation

DNA को restriction site पर काटना restriction enzyme का role है। Ligase joining enzyme है। / Cutting DNA at restriction sites is the role of restriction enzyme. Ligase is a joining enzyme.

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किस option में ligase का correct use recombinant DNA में है?

Which option gives correct use of ligase in recombinant DNA?

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A. different DNA fragments को जोड़नाJoining different DNA fragments

Explanation

Simple Explanation

Recombinant DNA में अलग स्रोतों के DNA fragments जोड़े जाते हैं। Ligase इस joining को स्थायी बनाता है। / In recombinant DNA DNA fragments from different sources are joined. Ligase makes this joining permanent.

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कौन सा option ligase से जुड़ी practical interpretation है?

Which option is a practical interpretation related to ligase?

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A. no colonies with insert may indicate ligation problem

Explanation

Simple Explanation

Cloning practical में desired recombinant कम मिलना ligation problem का संकेत हो सकता है। यह हमेशा एकमात्र कारण नहीं होता। / In cloning practical fewer desired recombinants can indicate a ligation problem. It is not always the only reason.

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किस option में ligase reaction का final product सही है?

Which option correctly gives the final product of a ligase reaction?

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A. joined DNA molecule

Explanation

Simple Explanation

Ligase DNA ends को जोड़कर joined DNA molecule बनाता है। यह product cloning और repair दोनों में उपयोगी हो सकता है। / Ligase joins DNA ends to form a joined DNA molecule. This product can be useful in both cloning and repair.

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Ligase को molecular glue कहने का best reason क्या है?

What is the best reason for calling ligase molecular glue?

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A. यह DNA pieces को covalent bond से जोड़ता हैIt joins DNA pieces with covalent bond

Explanation

Simple Explanation

Ligase DNA pieces को phosphodiester bond से जोड़ता है। इसलिए molecular glue analogy सही है। / Ligase joins DNA pieces with phosphodiester bonds. Therefore the molecular glue analogy is correct.

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किस option में ligase enzyme की सबसे basic पहचान है?

Which option gives the most basic identity of ligase enzyme?

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A. DNA joining enzyme

Explanation

Simple Explanation

Ligase की basic पहचान DNA joining enzyme है। इसे restriction enzyme से confuse न करें। / The basic identity of ligase is DNA joining enzyme. Do not confuse it with restriction enzyme.

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Ligase reaction में compatible ends क्यों जरूरी हैं?

Why are compatible ends important in ligase reaction?

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A. वे सही pairing और joining में मदद करते हैंThey help proper pairing and joining

Explanation

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Compatible ends पास आकर ligase के लिए joining आसान करते हैं। Incompatible ends ligation efficiency घटा सकते हैं। / Compatible ends come close and make joining easier for ligase. Incompatible ends can reduce ligation efficiency.

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कौन सा option ligase के लिए सही नहीं है?

Which option is not correct for ligase?

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D. It works as main starch digestive enzyme

Explanation

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Ligase starch digestion enzyme नहीं है। यह DNA ends को जोड़ने वाला enzyme है। / Ligase is not a starch digestive enzyme. It is an enzyme that joins DNA ends.

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DNA ligase का role leading strand पर कम प्रमुख क्यों माना जाता है?

Why is DNA ligase role considered less prominent on the leading strand?

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A. leading strand continuous synthesis से बनता हैLeading strand is made by continuous synthesis

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Leading strand continuous रूप से बनता है जबकि lagging strand पर Okazaki fragments बनते हैं। इसलिए ligase का fragment joining role lagging strand पर अधिक प्रमुख है। / The leading strand is made continuously while Okazaki fragments form on the lagging strand. Therefore ligase fragment joining role is more prominent on the lagging strand.

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Ligase किससे stable recombinant DNA बनाता है?

How does ligase make stable recombinant DNA?

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A. vector और insert के DNA backbone को जोड़करBy joining DNA backbones of vector and insert

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Ligase vector और insert के DNA backbones के बीच phosphodiester bond बनाता है। इससे stable recombinant DNA बनता है। / Ligase forms a phosphodiester bond between DNA backbones of vector and insert. This makes stable recombinant DNA.

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किस option में ligase और transformation का सही sequence है?

Which option gives the correct sequence of ligase and transformation?

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A. ligation पहले और transformation बाद मेंLigation first and transformation later

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Cloning में ligation recombinant DNA बनाता है। फिर transformation से इसे host cell में डाला जा सकता है। / In cloning ligation makes recombinant DNA. Then transformation can introduce it into a host cell.

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कौन सा option ligase enzymes को Class 11 context में best summarize करता है?

Which option best summarizes ligase enzymes in Class 11 context?

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A. DNA ends जोड़ने वाले enzymes useful in cloning and replicationDNA-end joining enzymes useful in cloning and replication

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Class 11 में ligase को cloning में DNA joining और replication में Okazaki fragment joining से जोड़ें। यही safest summary है। / In Class 11 link ligase with DNA joining in cloning and Okazaki fragment joining in replication. This is the safest summary.

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Ligase topic में exam के लिए कौन सा point सबसे ज्यादा उपयोगी है?

Which point is most useful for exams in the ligase topic?

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A. Ligase joins DNA and forms phosphodiester bond

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Ligase का core fact DNA joining और phosphodiester bond formation है। इसे restriction enzyme के cutting role से अलग रखें। / The core fact of ligase is DNA joining and phosphodiester bond formation. Keep it separate from the cutting role of restriction enzyme.

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Ligase enzymes का अंतिम revision answer क्या होना चाहिए?

What should be the final revision answer for ligase enzymes?

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A. Energy की मदद से DNA fragments को जोड़ने वाले enzymesEnzymes that join DNA fragments with the help of energy

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Ligase enzymes energy की मदद से DNA fragments को जोड़ते हैं। DNA ligase phosphodiester bond बनाकर DNA backbone को पूरा करता है। / Ligase enzymes join DNA fragments with the help of energy. DNA ligase completes the DNA backbone by forming phosphodiester bonds.

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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.