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Q. No.In an E. coli cell, the enzyme permease:
1. is present only when glucose levels are very low
2. is present only when lactose is freely available
3. is present in a low amount all the time
4. is not required for using lactose as a source of energy by the cell
Subtopic: Gene Regulation: Lac Operon |
71%
From NCERT
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Consider the two given statements:
| Assertion (A): | Today, DNA from a single cell is enough to perform DNA fingerprinting analysis. |
| Reason (R): | The use of PCR has increased the sensitivity of DNA fingerprinting. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | (A) is True but (R) is False |
| 3. | (A) is False but (R) is True |
| 4. | Both (A) and (R) are True but (R) does not correctly explain (A) |
Subtopic: DNA Fingerprinting |
80%
From NCERT
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What would not be true for nucleic acids?
| 1. | They are polynucleotides. |
| 2. | Together with polysaccharides and polypeptides, these comprise the true macromolecular fraction of any living tissue or cell. |
| 3. | A nucleotide has three chemically distinct components: a heterocyclic compound, a monosaccharide, and a phosphoric acid or a phosphate. |
| 4. | The hexose sugar found in polynucleotides is either ribose or 2’deoxyribose. |
Subtopic: DNA Double Helix |
64%
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Regarding methodologies used in sequencing human genome:
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: | Identifying all the genes that are expressed as RNA is referred to as Expressed Sequence Tags. |
| II: | 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 referred to as Sequence Annotation. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Human Genome Project |
89%
From NCERT
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What would be the number hybrid density DNA molecules, if Meselson and Stahl's experiment was continued for 60 minutes?
1. 2
2. 4
3. 6
4. 8
1. 2
2. 4
3. 6
4. 8
Subtopic: DNA Replication |
73%
From NCERT
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A molecule that can act as a genetic material must fulfill the traits given below, except:
| 1. | it should be able to express itself in the form of 'Mendelian characters' |
| 2. | it should be able to generate its replica |
| 3. | it should be unstable structurally and chemically |
| 4. | it should provide the scope for slow changes that are required for evolution |
Subtopic: DNA vs RNA as Genetic Material |
93%
From NCERT
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Unequivocal proof that DNA is the genetic material was first proposed by:
1. Wilkins and Franklin
2. Frederick Griffith
3. Alfred Hershey and Martha Chase
4. Avery, Macleod and McCarthy
1. Wilkins and Franklin
2. Frederick Griffith
3. Alfred Hershey and Martha Chase
4. Avery, Macleod and McCarthy
Subtopic: Search for Genetic Material |
79%
From NCERT
NEET - 2023
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Expressed Sequence Tags (ESTs) refers to:
1. Certain important expressed genes.
2. All genes that are expressed as RNA.
3. All genes that are expressed as proteins.
4. All genes whether expressed or unexpressed
1. Certain important expressed genes.
2. All genes that are expressed as RNA.
3. All genes that are expressed as proteins.
4. All genes whether expressed or unexpressed
Subtopic: Human Genome Project |
68%
From NCERT
NEET - 2023
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What is the role of RNA polymerase III in the process of transcription in Eukaryotes?
1. Transcription of only snRNAs
2. Transcription of rRNAs (28S, 18S and 5.8S)
3. Transcription of tRNA, 5 srRNA and snRNA
4. Transcription of precursor of mRNA
1. Transcription of only snRNAs
2. Transcription of rRNAs (28S, 18S and 5.8S)
3. Transcription of tRNA, 5 srRNA and snRNA
4. Transcription of precursor of mRNA
Subtopic: Transcription |
79%
From NCERT
NEET - 2023
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Subtopic: Translation |
59%
From NCERT
NEET - 2023
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