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Q. No.During translation, which of the following molecules acts as an adaptor?
1. mRNA
2. tRNA
3. rRNA
4. miRNA
Subtopic: Translation |
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If glucose is not present and if lactose is present, the lac repressor:
1. gets synthesized in larger quantities.
2. gets inactivated.
3. binds more tightly to the operator.
4. stimulates the catabolite activator protein.
1. gets synthesized in larger quantities.
2. gets inactivated.
3. binds more tightly to the operator.
4. stimulates the catabolite activator protein.
Subtopic: Gene Regulation: Lac Operon |
74%
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Subtopic: Genetic Code |
60%
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The complementary base pairing ensure which of the following features of a DNA double helix?
1. the antiparallel nature
2. the semiconservative nature
3. uniform diameter
4. uniform length
1. the antiparallel nature
2. the semiconservative nature
3. uniform diameter
4. uniform length
Subtopic: DNA Replication |
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AUG codon:
a. codes for methionine
b. is an initiation codon
1. Only a is correct
2. Only b is correct
3. Both a and b are correct
4. Both a and b are incorrect
a. codes for methionine
b. is an initiation codon
1. Only a is correct
2. Only b is correct
3. Both a and b are correct
4. Both a and b are incorrect
Subtopic: Genetic Code |
97%
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In the mature mRNA in eukaryotes:
1. exons and introns do not appear
2. exons appear but introns do not appear
3. introns appear but exons do not appear
4. both exons and introns appear
1. exons and introns do not appear
2. exons appear but introns do not appear
3. introns appear but exons do not appear
4. both exons and introns appear
Subtopic: Transcription |
89%
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Which chromosomes, respectively, have the highest and least number of genes located in them?
1. Chromosome 21 and Y
2. Chromosome 1 and X
3. Chromosome 1 and Y
4. Chromosome X and Y
1. Chromosome 21 and Y
2. Chromosome 1 and X
3. Chromosome 1 and Y
4. Chromosome X and Y
Subtopic: Human Genome Project |
82%
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Consider the given two statements:
| Assertion (A): | The lac operon will not be transcribed if lactose is absent. |
| Reason (R): | Lactose is the inducer of the lac operon. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A) |
| 3. | (A) is True, (R) is False |
| 4. | (A) is False, (R) is True |
Subtopic: Gene Regulation: Lac Operon |
88%
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Subtopic: Genetic Code |
78%
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Who proposed a semi-conservative mode for the replication of DNA molecule?
1. Meselson and Stahl
2. Watson and Crick
3. Beadle and Tatum
4. Temin and Baltimore
Subtopic: DNA Double Helix |
56%
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