Select Question Set:
Q. No.The main enzyme involved in DNA replication is referred to as DNA-dependent DNA polymerase, since:
1.
it uses a DNA template to catalyse the polymerisation of deoxyribonucleotides.
2.
it uses a DNA template to catalyse the polymerisation of ribonucleotides.
3.
it uses an RNA template to catalyse the polymerisation of deoxyribonucleotides.
4.
it uses an RNA template to catalyse the polymerisation of ribonucleotides.
Subtopic: DNA Replication: I |
89%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
The promoter in a transcription unit:
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
| I: | is said to be located towards 3'-end (upstream) of the structural gene (the reference is made with respect to the polarity of template strand). |
| II: | is a DNA sequence that provides binding site for RNA polymerase. |
| III: | defines the template and coding strands. |
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Transcription |
57%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Allelic sequence variation has traditionally been described as a DNA polymorphism if more than one variant (allele) at a locus occurs in human population with a frequency greater than:
| 1. | 0.01 | 2. | 0.05 |
| 3. | 0.10 | 4. | 1.00 |
Subtopic: DNA Fingerprinting |
80%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
The technique of DNA Fingerprinting was initially developed by:
| 1. | Kary Mullis | 2. | Alec Jeffreys |
| 3. | Paul Berg | 4. | Thomas Cech |
Subtopic: DNA Fingerprinting |
92%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
In DNA fingerprinting involving Southern blot hybridisation using radiolabelled VNTR as a probe, the correct chronology of steps between isolation of DNA [first step] and detection of hybridised DNA fragments by autoradiography [last step] is:
| 1. | separation of DNA fragments by electrophoresis → digestion of DNA by restriction endonucleases → transferring (blotting) of separated DNA fragments to synthetic membranes, such as nitrocellulose or nylon → hybridisation using labelled VNTR probe |
| 2. | digestion of DNA by restriction endonucleases →separation of DNA fragments by electrophoresis → transferring (blotting) of separated DNA fragments to synthetic membranes, such as nitrocellulose or nylon → hybridisation using labelled VNTR probe |
| 3. | separation of DNA fragments by electrophoresis → digestion of DNA by restriction endonucleases → hybridisation using labelled VNTR probe → transferring (blotting) of separated DNA fragments to synthetic membranes, such as nitrocellulose or nylon |
| 4. | digestion of DNA by restriction endonucleases →separation of DNA fragments by electrophoresis → hybridisation using labelled VNTR probe → transferring (blotting) of separated DNA fragments to synthetic membranes, such as nitrocellulose or nylon |
Subtopic: DNA Fingerprinting |
73%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
The length of DNA is:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | usually defined as number of nucleotides (or a pair of nucleotide referred to as base pairs) present in it. |
| II: | is the characteristic of an organism. |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: The DNA |
80%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Consider the given two statements:
| Statement I: | A nitrogenous base is linked to the OH of 1'C pentose sugar through a N-glycosidic linkage to form a nucleoside. |
| Statement II: | When a phosphate group is linked to OH of 5'C of a nucleoside through phosphoester linkage, a corresponding nucleotide (or deoxynucleotide depending upon the type of sugar present) is formed. |
| 1. | Statement I is correct; Statement II is incorrect |
| 2. | Statement I is incorrect; Statement II is incorrect |
| 3. | Statement I is correct; Statement II is correct |
| 4. | Statement I is incorrect; Statement II is correct |
Subtopic: The DNA |
88%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
In the given diagram:
1. Only I and II are correct
2. Only II and III are correct
3. I, II and III are correct
4. I, II, and III are incorrect
| I: | A is 3’-5’ direction. |
| II: | B is hydrogen bond. |
| III: | C is phosphodiester bond. |
1. Only I and II are correct
2. Only II and III are correct
3. I, II and III are correct
4. I, II, and III are incorrect
Subtopic: DNA Double Helix |
66%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
When compared to DNA, in RNA:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | every nucleotide residue has an additional –OH group present at 3'-position in the ribose. |
| II: | 5-methyl uracil is found instead of thymine. |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: DNA vs RNA as Genetic Material |
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Consider the given two statements:
| Assertion (A): | If the sequence of bases in one strand of the dsDNA molecule is known then the sequence in other strand can be predicted. |
| Reason (R): | The base pairing in a dsDNA molecule is complementary to each other. |
| 1. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 2. | (A) is True but (R) is False. |
| 3. | (A) is False but (R) is True. |
| 4. | Both (A) and (R) are True and (R) correctly explains (A). |
Subtopic: DNA Double Helix |
86%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Select Question Set:
© 2025 GoodEd Technologies Pvt. Ltd.