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Class 11 Biotechnology Easy Quiz

Level 20 • 50/50 questions • 40 seconds per question.

Level readiness 50/50 Questions
Time Left 33:20 40 sec/question
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Answered 0/50 Correct 0 Time 33:20

एक student ने कहा कि ligase DNA को काटता है। सही correction क्या है?

A student says ligase cuts DNA. What is the correct correction?

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Correct Answer

A. ligase DNA को जोड़ता हैLigase joins DNA

Explanation

Simple Explanation

Ligase DNA cutting enzyme नहीं है। यह DNA fragments को जोड़ने वाला enzyme है। / Ligase is not a DNA-cutting enzyme. It is an enzyme that joins DNA fragments.

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कटे हुए plasmid और gene fragment को जोड़ने के लिए कौन सा enzyme चाहिए?

Which enzyme is needed to join a cut plasmid and gene fragment?

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Correct Answer

A. DNA ligase

Explanation

Simple Explanation

Cut plasmid और gene fragment को join करने के लिए DNA ligase उपयोग होता है। यह recombinant plasmid बनाने में मदद करता है। / DNA ligase is used to join a cut plasmid and gene fragment. It helps make a recombinant plasmid.

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Ligase enzyme किस reaction को catalyze करता है?

Which reaction is catalyzed by ligase enzyme?

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A. DNA ends के बीच joining reactionJoining reaction between DNA ends

Explanation

Simple Explanation

DNA ligase DNA ends के बीच joining catalyze करता है। यह reaction phosphodiester bond formation से जुड़ी है। / DNA ligase catalyzes joining between DNA ends. This reaction is linked with phosphodiester bond formation.

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DNA ligase के लिए सबसे सही substrate कौन सा है?

Which is the most correct substrate for DNA ligase?

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A. nicked DNA

Explanation

Simple Explanation

DNA ligase nicked DNA पर काम करके nick seal कर सकता है। यह DNA backbone को continuous बनाता है। / DNA ligase can act on nicked DNA and seal the nick. It makes the DNA backbone continuous.

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एक cloning tube में vector और insert हैं लेकिन ligase नहीं है। क्या कमी रहेगी?

A cloning tube has vector and insert but no ligase. What will be missing?

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Correct Answer

A. stable phosphodiester joining

Explanation

Simple Explanation

Ligase न होने पर permanent phosphodiester bond नहीं बनेगा। इसलिए stable recombinant DNA नहीं बनेगा। / Without ligase the permanent phosphodiester bond will not form. Therefore stable recombinant DNA will not form.

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कौन सा condition sticky-end ligation के लिए favorable है?

Which condition is favorable for sticky-end ligation?

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A. complementary overhangs present होंComplementary overhangs are present

Explanation

Simple Explanation

Complementary overhangs sticky ends को पहले pair करने देते हैं। Active ligase फिर permanent bond बनाता है। / Complementary overhangs allow sticky ends to pair first. Active ligase then makes a permanent bond.

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Blunt-end ligation में main challenge क्या है?

What is the main challenge in blunt-end ligation?

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A. complementary overhang absent होता हैComplementary overhang is absent

Explanation

Simple Explanation

Blunt ends में overhang नहीं होता इसलिए initial base pairing support कम होता है। इसलिए ligation less efficient हो सकती है। / Blunt ends lack overhangs so initial base pairing support is low. Therefore ligation can be less efficient.

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कौन सा enzyme sticky और blunt दोनों DNA ends को join करने में commonly used है?

Which enzyme is commonly used to join both sticky and blunt DNA ends?

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Correct Answer

A. T4 DNA ligase

Explanation

Simple Explanation

T4 DNA ligase sticky और blunt दोनों प्रकार के DNA ends जोड़ सकता है। इसलिए cloning lab में यह popular है। / T4 DNA ligase can join both sticky and blunt DNA ends. Therefore it is popular in cloning labs.

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T4 DNA ligase किस molecule की energy use करता है?

T4 DNA ligase uses energy from which molecule?

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Correct Answer

A. ATP

Explanation

Simple Explanation

T4 DNA ligase ATP का use करता है। Energy phosphodiester bond बनाने में काम आती है। / T4 DNA ligase uses ATP. Energy is used to form a phosphodiester bond.

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E coli DNA ligase किस cofactor से commonly associated है?

E coli DNA ligase is commonly associated with which cofactor?

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A. NAD plus

Explanation

Simple Explanation

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

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किस option में T4 DNA ligase का source सही है?

Which option gives the correct source of T4 DNA ligase?

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Correct Answer

A. T4 bacteriophage

Explanation

Simple Explanation

T4 DNA ligase T4 bacteriophage से जुड़ा है। इसका प्रयोग recombinant DNA cloning में किया जाता है। / T4 DNA ligase is linked with T4 bacteriophage. It is used in recombinant DNA cloning.

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DNA ligase replication में कौन सा काम करता है?

What does DNA ligase do in replication?

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A. Okazaki fragments को join करता हैJoins Okazaki fragments

Explanation

Simple Explanation

Replication में DNA ligase Okazaki fragments को join करता है। यह lagging strand को continuous बनाता है। / In replication DNA ligase joins Okazaki fragments. It makes the lagging strand continuous.

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कौन सा enzyme lagging strand के fragments को continuous बनाता है?

Which enzyme makes fragments of the lagging strand continuous?

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A. DNA ligase

Explanation

Simple Explanation

Lagging strand पर बने Okazaki fragments को DNA ligase जोड़ता है। इससे DNA strand continuous बनता है। / DNA ligase joins Okazaki fragments formed on the lagging strand. This makes the DNA strand continuous.

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DNA ligase किस तरह की DNA damage repair में direct मदद करता है?

DNA ligase directly helps in repair of which type of DNA damage?

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A. single-strand nick

Explanation

Simple Explanation

DNA ligase single-strand nick को seal कर सकता है। यह DNA backbone continuity restore करता है। / DNA ligase can seal a single-strand nick. It restores DNA backbone continuity.

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Ligase और polymerase के roles में सही statement कौन सा है?

Which statement correctly describes roles of ligase and polymerase?

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A. polymerase strand बढ़ाता है और ligase nick seal करता हैPolymerase extends strand and ligase seals nick

Explanation

Simple Explanation

Polymerase nucleotides जोड़कर strand बढ़ाता है। Ligase fragments के बीच backbone nick seal करता है। / Polymerase extends a strand by adding nucleotides. Ligase seals backbone nicks between fragments.

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Ligase और helicase के बीच सही matching कौन सी है?

Which is the correct matching between ligase and helicase?

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A. ligase joins DNA और helicase unwinds DNALigase joins DNA and helicase unwinds DNA

Explanation

Simple Explanation

Helicase DNA double helix को खोलता है। Ligase DNA fragments को जोड़ता है। / Helicase unwinds the DNA double helix. Ligase joins DNA fragments.

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किस option में ligase का incorrect role दिया है?

Which option gives an incorrect role of ligase?

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Correct Answer

D. Cutting DNA at restriction site

Explanation

Simple Explanation

Restriction site पर DNA cutting restriction enzyme करता है। Ligase DNA ends joining करता है। / DNA cutting at restriction sites is done by restriction enzymes. Ligase joins DNA ends.

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किस option में ligase का correct role in recombinant DNA है?

Which option gives the correct role of ligase in recombinant DNA?

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A. foreign DNA और vector को covalently join करनाCovalently joining foreign DNA and vector

Explanation

Simple Explanation

Ligase foreign DNA और vector backbone के बीच covalent phosphodiester bond बनाता है। इससे recombinant DNA stable होता है। / Ligase forms covalent phosphodiester bonds between foreign DNA and vector backbone. This makes recombinant DNA stable.

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Ligation mixture में buffer का purpose क्या है?

What is the purpose of buffer in a ligation mixture?

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A. enzyme के लिए suitable pH और salts देनाProviding suitable pH and salts for the enzyme

Explanation

Simple Explanation

Buffer ligase activity के लिए सही environment देता है। Wrong buffer ligation efficiency घटा सकता है। / Buffer gives the right environment for ligase activity. Wrong buffer can reduce ligation efficiency.

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DNA ligase reaction में Mg ion का role क्या हो सकता है?

What can be the role of Mg ion in DNA ligase reaction?

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A. enzyme activity में सहायक cofactorA helper cofactor for enzyme activity

Explanation

Simple Explanation

कई ligation reactions में magnesium ion enzyme activity के लिए महत्वपूर्ण होता है। Practical buffer में ऐसे ions शामिल हो सकते हैं। / In many ligation reactions magnesium ion is important for enzyme activity. Practical buffers may include such ions.

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Ligation के बाद recombinant DNA को host cell में डालने की प्रक्रिया क्या कहलाती है?

After ligation what is the process of introducing recombinant DNA into a host cell called?

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A. transformation

Explanation

Simple Explanation

Ligase recombinant DNA बनाता है और फिर उसे host cell में डाला जा सकता है। यह process transformation कहलाती है। / Ligase makes recombinant DNA and then it can be introduced into a host cell. This process is called transformation.

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Self-ligation cloning experiment में क्यों समस्या हो सकती है?

Why can self-ligation be a problem in a cloning experiment?

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A. vector insert के बिना जुड़ सकता हैVector can join without insert

Explanation

Simple Explanation

Self-ligation में vector अपने ही ends जोड़ सकता है। इससे desired recombinant plasmid नहीं बनता। / In self-ligation the vector can join its own ends. This does not form the desired recombinant plasmid.

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Directional cloning ligase से जुड़े result को कैसे सुधार सकती है?

How can directional cloning improve the result related to ligase?

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A. insert को desired orientation में जोड़ने में मदद करती हैIt helps join insert in desired orientation

Explanation

Simple Explanation

Directional cloning अलग ends का उपयोग करती है। Ligase तब insert को सही orientation में जोड़ सकता है। / Directional cloning uses different ends. Ligase can then join the insert in the correct orientation.

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कौन सा option ligase reaction failure का possible reason है?

Which option is a possible reason for ligase reaction failure?

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A. inactive ligase

Explanation

Simple Explanation

Inactive ligase bond formation नहीं कर पाएगा। Proper buffer compatible ends और energy ligation में मदद करते हैं। / Inactive ligase will not form bonds. Proper buffer compatible ends and energy help ligation.

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अगर sticky ends complementary नहीं हैं तो ligase reaction पर क्या असर होगा?

If sticky ends are not complementary what will happen to ligase reaction?

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A. joining कठिन होगीJoining will be difficult

Explanation

Simple Explanation

Non-complementary sticky ends base pairing नहीं कर पाएंगे। इससे ligation efficiency कम हो सकती है। / Non-complementary sticky ends cannot base pair properly. This can reduce ligation efficiency.

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कौन सा option ligase reaction में correct chemical end बताता है?

Which option gives a correct chemical end in ligase reaction?

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A. 3 prime hydroxyl

Explanation

Simple Explanation

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

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कौन सा option ligase reaction में दूसरा जरूरी chemical end है?

Which option is the other required chemical end in ligase reaction?

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A. 5 prime phosphate

Explanation

Simple Explanation

5 prime phosphate phosphodiester bond formation के लिए जरूरी है। इसके बिना ligation affected हो सकती है। / 5 prime phosphate is required for phosphodiester bond formation. Without it ligation can be affected.

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Ligase enzyme का action किस type का है?

What type of action does ligase enzyme perform?

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A. bond formation

Explanation

Simple Explanation

Ligase enzyme bond formation करता है। DNA ligase DNA ends के बीच phosphodiester bond बनाता है। / Ligase enzyme performs bond formation. DNA ligase makes a phosphodiester bond between DNA ends.

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किस option में ligase और DNA continuity का correct relation है?

Which option gives the correct relation between ligase and DNA continuity?

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A. ligase backbone nicks seal करके continuity restore करता हैLigase restores continuity by sealing backbone nicks

Explanation

Simple Explanation

Ligase DNA backbone में nicks को seal करता है। इससे DNA strand की continuity बनी रहती है। / Ligase seals nicks in the DNA backbone. This maintains continuity of the DNA strand.

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कौन सा option ligase का practical storage point है?

Which option is a practical storage point for ligase?

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A. cold condition में रखनाKeep in cold condition

Explanation

Simple Explanation

Ligase protein enzyme है और heat sensitive हो सकता है। Cold storage activity preserve करता है। / Ligase is a protein enzyme and can be heat sensitive. Cold storage preserves activity.

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किस option में ligase और cloning workflow का सही क्रम है?

Which option gives the correct order involving ligase in cloning workflow?

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A. cut DNA फिर ligate DNA फिर transformCut DNA then ligate DNA then transform

Explanation

Simple Explanation

Cloning में पहले vector और insert cut होते हैं फिर ligation होता है और recombinant DNA host में जाता है। यह logical order है। / In cloning vector and insert are first cut then ligated and recombinant DNA goes into host. This is the logical order.

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कौन सा option ligase से बनने वाले recombinant plasmid को best describe करता है?

Which option best describes a recombinant plasmid formed by ligase?

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A. vector DNA और insert DNA का joined moleculeJoined molecule of vector DNA and insert DNA

Explanation

Simple Explanation

Ligase vector DNA और insert DNA को जोड़कर recombinant plasmid बना सकता है। यह gene cloning का central product है। / Ligase can join vector DNA and insert DNA to form a recombinant plasmid. This is the central product of gene cloning.

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कौन सा statement ligase और energy के बारे में सही है?

Which statement about ligase and energy is correct?

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A. bond formation के लिए energy चाहिएEnergy is needed for bond formation

Explanation

Simple Explanation

Ligase नया covalent bond बनाने के लिए energy use करता है। ATP या NAD plus enzyme type पर निर्भर कर सकता है। / Ligase uses energy to form a new covalent bond. ATP or NAD plus can depend on enzyme type.

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कौन सा option ligase का सही comparison restriction enzyme से करता है?

Which option correctly compares ligase with restriction enzyme?

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A. ligase glue जैसा और restriction enzyme scissors जैसाLigase is like glue and restriction enzyme is like scissors

Explanation

Simple Explanation

Ligase DNA जोड़ता है इसलिए glue analogy सही है। Restriction enzyme DNA काटता है इसलिए scissors analogy सही है। / Ligase joins DNA so the glue analogy is correct. Restriction enzyme cuts DNA so the scissors analogy is correct.

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किस question में ligase का सही answer DNA ligase होगा?

In which question will DNA ligase be the correct answer?

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A. कौन सा enzyme Okazaki fragments जोड़ता हैWhich enzyme joins Okazaki fragments

Explanation

Simple Explanation

Okazaki fragments को join करने वाला enzyme DNA ligase है। DNA खोलना helicase और cutting restriction enzyme से जुड़ा है। / The enzyme that joins Okazaki fragments is DNA ligase. Unwinding is linked with helicase and cutting with restriction enzymes.

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किस option में DNA ligase और repair का correct example है?

Which option gives a correct example of DNA ligase and repair?

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A. damaged strand में nick seal करनाSealing a nick in a damaged strand

Explanation

Simple Explanation

DNA ligase repair में damaged strand के nick को seal कर सकता है। यह DNA stability के लिए जरूरी है। / DNA ligase can seal a nick in a damaged strand during repair. This is important for DNA stability.

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कौन सा option ligase enzyme की limitation बताता है?

Which option gives a limitation of ligase enzyme?

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A. यह compatible और chemically proper ends के बिना efficient नहीं होगाIt will not be efficient without compatible and chemically proper ends

Explanation

Simple Explanation

Ligase को proper DNA ends चाहिए। Incompatible या missing phosphate ends ligation को कमजोर कर सकते हैं। / Ligase needs proper DNA ends. Incompatible or missing phosphate ends can weaken ligation.

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किस option में ligase और 5 prime phosphate का सही link है?

Which option correctly links ligase and 5 prime phosphate?

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A. 5 prime phosphate bond formation में जरूरी है5 prime phosphate is needed in bond formation

Explanation

Simple Explanation

DNA ligase 5 prime phosphate और 3 prime OH के बीच phosphodiester bond बनाता है। इसलिए 5 prime phosphate important है। / DNA ligase forms a phosphodiester bond between 5 prime phosphate and 3 prime OH. Therefore 5 prime phosphate is important.

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किस option में ligase और 3 prime OH का सही link है?

Which option correctly links ligase and 3 prime OH?

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Correct Answer

A. 3 prime OH phosphodiester bond formation में भाग लेता है3 prime OH participates in phosphodiester bond formation

Explanation

Simple Explanation

DNA ligase 3 prime OH को 5 prime phosphate से जोड़ता है। इससे DNA backbone continuous होती है। / DNA ligase joins 3 prime OH with 5 prime phosphate. This makes the DNA backbone continuous.

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कौन सा option ligase के बारे में false है?

Which option is false about ligase?

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D. It recognizes palindromic sites and cuts DNA

Explanation

Simple Explanation

Palindromic sites को recognize करके DNA काटना restriction enzymes का काम है। Ligase joining enzyme है। / Recognizing palindromic sites and cutting DNA is the role of restriction enzymes. Ligase is a joining enzyme.

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किस option में ligase और class 11 biotechnology का correct relation है?

Which option gives the correct relation between ligase and Class 11 biotechnology?

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A. recombinant DNA construction में DNA joining toolDNA joining tool in recombinant DNA construction

Explanation

Simple Explanation

Class 11 biotechnology में ligase recombinant DNA construction का joining tool है। इसे cloning workflow में पढ़ें। / In Class 11 biotechnology ligase is a joining tool in recombinant DNA construction. Study it in cloning workflow.

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एक experiment में vector और insert cut हैं और compatible हैं। Ligase add करने से क्या expected है?

In an experiment vector and insert are cut and compatible. What is expected after adding ligase?

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A. recombinant DNA बनने की संभावनाPossibility of recombinant DNA formation

Explanation

Simple Explanation

Compatible vector और insert को ligase join कर सकता है। इससे recombinant DNA बनने की संभावना होती है। / Ligase can join compatible vector and insert. This gives a possibility of recombinant DNA formation.

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किस option में ligase का correct output in replication है?

Which option gives the correct output of ligase in replication?

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Correct Answer

A. continuous lagging strand

Explanation

Simple Explanation

Ligase Okazaki fragments जोड़कर lagging strand को continuous बनाता है। यह replication में essential role है। / Ligase joins Okazaki fragments to make the lagging strand continuous. This is an essential role in replication.

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कौन सा enzyme DNA backbone के nick को close करता है?

Which enzyme closes a nick in the DNA backbone?

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Correct Answer

A. DNA ligase

Explanation

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DNA ligase DNA backbone nick को close करता है। Restriction enzyme DNA को cut करता है। / DNA ligase closes a nick in the DNA backbone. Restriction enzyme cuts DNA.

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किस option में ligase और covalent bond का सही संबंध है?

Which option gives the correct relation between ligase and covalent bond?

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A. Ligase covalent phosphodiester bond बनाता हैLigase forms a covalent phosphodiester bond

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Ligase covalent phosphodiester bond बनाकर DNA fragments को स्थायी रूप से जोड़ता है। यही उसका catalytic product है। / Ligase forms covalent phosphodiester bonds to permanently join DNA fragments. This is its catalytic product.

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Ligase enzyme किस कारण cloning में essential माना जाता है?

Why is ligase considered essential in cloning?

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A. यह cut DNA pieces को stable recombinant molecule बनाता हैIt makes cut DNA pieces into a stable recombinant molecule

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Restriction digestion के बाद DNA pieces को stable molecule बनाने के लिए ligase चाहिए। यही cloning में essential step है। / After restriction digestion ligase is needed to make DNA pieces into a stable molecule. This is an essential step in cloning.

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किस option में ligase और permanent joining का correct reason है?

Which option gives the correct reason for permanent joining by ligase?

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A. phosphodiester bond formation

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Permanent joining phosphodiester bond formation से होती है। Ligase यही bond DNA backbone में बनाता है। / Permanent joining happens by phosphodiester bond formation. Ligase forms this bond in the DNA backbone.

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Ligase enzymes topic में best one-line definition क्या है?

What is the best one-line definition in the topic Ligase Enzymes?

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

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Ligase enzymes energy की सहायता से DNA ends join करते हैं। DNA ligase phosphodiester bond बनाता है। / Ligase enzymes join DNA ends with the help of energy. DNA ligase forms a phosphodiester bond.

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कौन सा revision pair सबसे सही है?

Which revision pair is most correct?

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A. restriction enzyme-cut और ligase-joinrestriction enzyme-cut and ligase-join

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Restriction enzyme और ligase का यह pair exam में बहुत useful है। Cutting और joining को अलग-अलग याद रखें। / This pair of restriction enzyme and ligase is very useful in exams. Remember cutting and joining separately.

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Ligase enzymes का सबसे सुरक्षित exam summary क्या है?

What is the safest exam summary of ligase enzymes?

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A. ये DNA fragments को phosphodiester bond से जोड़ते हैंThey join DNA fragments with phosphodiester bonds

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Ligase enzymes DNA fragments को जोड़ते हैं और phosphodiester bonds बनाते हैं। Class 11 में इन्हें recombinant DNA और replication से जोड़ें। / Ligase enzymes join DNA fragments and form phosphodiester bonds. In Class 11 link them with recombinant DNA and replication.

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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 50 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.