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Q. No.When compared to DNA, in RNA:
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
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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
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A hypothetical dsDNA of 100 bp length molecule was found to be composed of 40 Adenine residues. The total number of hydrogen bonds in all base pairs of this molecule is expected to be:
| 1. | 100 | 2. | 130 |
| 3. | 260 | 4. | 300 |
Subtopic: DNA Double Helix |
79%
From NCERT
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Consider the given two statements:
| Assertion (A): | Viruses having RNA genome and having shorter life span mutate and evolve faster. |
| Reason (R): | RNA being unstable, mutates at a faster rate. |
| 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 vs RNA as Genetic Material |
84%
From NCERT
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Consider the given two statements:
1. Both I and II are correct
2. Only II is correct
3. Only I is correct
4. Both I and II are incorrect
| Statement I: | A transcription unit in DNA is the structural gene that is flanked by the promoter and the terminator. |
| Statement II: | A translational unit in mRNA is the sequence of RNA that is flanked by the start codon (AUG) and the stop codon |
1. Both I and II are correct
2. Only II is correct
3. Only I is correct
4. Both I and II are incorrect
Subtopic: Transcription:II |
85%
From NCERT
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The methodology used in human genome sequencing that took the blind approach of simply sequencing the
whole set of genome that contained all the coding and non-coding sequence, and later assigning different
regions in the sequence with functions, is called as:
1. Expressed sequence tag
2. Sequence annotation
3. Chain termination
4. Physical mapping
whole set of genome that contained all the coding and non-coding sequence, and later assigning different
regions in the sequence with functions, is called as:
1. Expressed sequence tag
2. Sequence annotation
3. Chain termination
4. Physical mapping
Subtopic: Human Genome Project |
83%
From NCERT
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The last of the 24 human chromosomes – 22 autosomes and X and Y – to be sequenced was:
1. Chromosome 1
2. the X chromosome
3. the Y chromosome
4. Chromosome 22
1. Chromosome 1
2. the X chromosome
3. the Y chromosome
4. Chromosome 22
Subtopic: Human Genome Project |
87%
From NCERT
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Consider the given two statements:
| Assertion (A): | The probability of variation [due to mutation] to be observed in non-coding DNA sequence would be higher than in coding DNA sequence. |
| Reason (R): | Mutations in non-coding DNA sequences may not have any immediate effect/impact in an individual’s reproductive ability. |
| 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 Fingerprinting |
55%
From NCERT
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Consider the given two statements:
| Statement I: | Mice infected with the S strain Streptococcus pneumoniae die from pneumonia infection but mice infected with the R strain do not develop pneumonia. |
| Statement II: | When Streptococcus pneumoniae (pneumococcus) bacteria are grown on a culture plate, some produce smooth shiny colonies (S) while others produce rough colonies (R). |
| 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: Search for Genetic Material |
93%
From NCERT
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In the human genome, the chromosome with most number of genes and the chromosome with fewest genes, carried by them, respectively are:
1. The X Chromosome and the Y Chromosome
2. Chromosome 1 and Chromosome 22
3. Chromosome 1 the Y chromosome
4. Chromosome 1 the X chromosome
1. The X Chromosome and the Y Chromosome
2. Chromosome 1 and Chromosome 22
3. Chromosome 1 the Y chromosome
4. Chromosome 1 the X chromosome
Subtopic: Human Genome Project |
91%
From NCERT
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