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Q. No.In lac operon, z gene codes for :
1. \(\beta -\)galactosidase
2. Permease
3. Repressor
4. Transacetylase
Subtopic: Gene Regulation: Lac Operon |
90%
From NCERT
NEET - 2022
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Match List-I with List- II
Choose the correct answer from the options given below :
| List-I | List-II | ||
| (a) | In lac operon i gene codes for | (i) | transacetylase |
| (b) | In lac operon z gene codes for | (ii) | permease |
| (c) | In lac operon y gene codes for | (iii) | \(\beta-\)galactosidase |
| (d) | In lac operon a gene codes for | (iv) | Repressor |
Choose the correct answer from the options given below :
| (a) | (b) | (c) | (d) | |
| 1. | (iii) | (ii) | (i) | (iv) |
| 2. | (iv) | (iii) | (ii) | (i) |
| 3. | (iv) | (i) | (iii) | (ii) |
| 4. | (iii) | (i) | (iv) | (ii) |
Subtopic: Gene Regulation: Lac Operon |
91%
From NCERT
NEET - 2022
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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. Both Statement I and Statement II are correct.
2. Both Statement I and Statement II are incorrect.
3. Statement I is correct but Statement II is incorrect.
4. Statement I is incorrect but Statement II is correct.
| Statement I: | DNA polymerases catalyse polymerisation only in one direction, that is 5' →3' |
| Statement II: | During replication of DNA, on one strand the replication is continuous while on other strand it is discontinuous. |
1. Both Statement I and Statement II are correct.
2. Both Statement I and Statement II are incorrect.
3. Statement I is correct but Statement II is incorrect.
4. Statement I is incorrect but Statement II is correct.
Subtopic: DNA Replication |
86%
From NCERT
NEET - 2022
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Match List-I with List-II
Choose the correct answer from the options given below:
| List- I | List-II | ||
| (a) | Bacteriophage \(\phi \times 174\) | (i) | 48502 base pairs |
| (b) | Bacteriophage lambda | (ii) | 5386 nucleotides |
| (c) | Escherichia coli | (iii) | 3.3 × 109 base pairs |
| (d) | Haploid content human DNA | (iv) | 4.6 × 106 base pairs of |
Choose the correct answer from the options given below:
| (a) | (b) | (c) | (d) | |
| 1. | (i) | (ii) | (iii) | (iv) |
| 2. | (ii) | (iv) | (i) | (iii) |
| 3. | (ii) | (i) | (iv) | (iii) |
| 4. | (i) | (ii) | (iv) | (iii) |
Subtopic: The DNA |
81%
From NCERT
NEET - 2022
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If DNA contained sulphur instead of phosphorus and proteins contained phosphorus instead of sulfur, what would have been the outcome of Hershey and Chase experiment?
| 1. | No radioactive sulfur in bacterial cells |
| 2. | Both radioactive sulfur and phosphorus in bacterial cells |
| 3. | Radioactive sulfur in bacterial cells |
| 4. | Radioactive phosphorus in bacterial cells |
Subtopic: Search for Genetic Material |
72%
From NCERT
NEET - 2022
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Against the codon 5' UAC 3', what would be the sequence of anticodon on tRNA ?
1. 5' AUG 3'
2. 5' ATG 3'
3. 5' GTA 3'
4. 5' GUA 3
1. 5' AUG 3'
2. 5' ATG 3'
3. 5' GTA 3'
4. 5' GUA 3
Subtopic: Translation |
From NCERT
NEET - 2022
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Assertion: If each strand from a DNA acts as a template for the synthesis of a new strand, the two double stranded DNA thus, produced would be identical to the parental DNA molecule.
Reason: The two strands in a double stranded DNA molecule are identical to each other and antiparallel.
1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false
Reason: The two strands in a double stranded DNA molecule are identical to each other and antiparallel.
1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false
Subtopic: DNA Double Helix | DNA Replication |
From NCERT
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Assertion: The distance between the two strands of the DNA helix is approximately uniform.
Reason: A base pair always contains a purine and a pyrimidine.
1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.
Reason: A base pair always contains a purine and a pyrimidine.
1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.
Subtopic: DNA Double Helix |
70%
From NCERT
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Assertion: A set of positively charged and basic proteins are used in the packaging of Eukaryotic DNA.
Reason: DNA has a negative charge and is an acid.
1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.
Reason: DNA has a negative charge and is an acid.
1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.
Subtopic: DNA Packaging |
69%
From NCERT
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Assertion: Euchromatin is said to transcriptionally active protein.
Reason: Euchromatin is densely packed and stains dark.
1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.
Reason: Euchromatin is densely packed and stains dark.
1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.
Subtopic: DNA Packaging |
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