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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 |
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Level 2: 60%+
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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 |
81%
Level 1: 80%+
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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 |
65%
Level 2: 60%+
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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 |
81%
Level 1: 80%+
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%
Level 2: 60%+
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 |
82%
Level 1: 80%+
NEET - 2023
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Subtopic: Translation |
63%
Level 2: 60%+
NEET - 2023
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Given below are two statements:
In the light of the above statements, choose the correct answer from the options given below:
1. Statement I is incorrect but Statement II is correct.
2. Both Statement I and Statement II are correct.
3. Both Statement I and Statement II are incorrect.
4. Statement I is correct but Statement II is incorrect.
| Statement I: | In prokaryotes, the positively charged DNA is held with some negatively charged proteins in a region called nucleoid. |
| Statement II: | In eukaryotes, the negatively charged DNA is wrapped around the positively charged histone octamer to form nucleosome. |
1. Statement I is incorrect but Statement II is correct.
2. Both Statement I and Statement II are correct.
3. Both Statement I and Statement II are incorrect.
4. Statement I is correct but Statement II is incorrect.
Subtopic: DNA Packaging |
75%
Level 2: 60%+
NEET - 2023
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Match List I with List II
Choose the correct answer from the options given below:
| List I | List II | ||
| A. | Gene 'a' | I. | \(\beta\)-galactosidase |
| B. | Gene 'y' | II. | Transacetylase |
| C. | Gene 'i' | III. | Permease |
| D. | Gene 'z' | IV. | Repressor protein |
Choose the correct answer from the options given below:
| Options: | A | B | C | D |
| 1. | III | I | IV | II |
| 2. | II | I | IV | III |
| 3. | II | III | IV | I |
| 4. | III | IV | I | II |
Subtopic: Gene Regulation: Lac Operon |
85%
Level 1: 80%+
NEET - 2023
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Subtopic: Human Genome Project | DNA Fingerprinting |
79%
Level 2: 60%+
NEET - 2023
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