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Q. No.Identify the correct pair of codon with its corresponding pair of amino acid :
1.
UAA : Leucine
2.
UGA : Serine
3.
AUG : Histidine
4.
UUU : Phenylalanine
Subtopic: Genetic Code |
88%
From NCERT
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Consider the given two statements:
Assertion: If each strand from a parental DNA acts as a template for synthesis of a new strand, the two
double stranded daughter DNA thus, produced would be identical to the parental DNA molecule.
Reason: For a double stranded DNA, the ratios between Adenine and Thymine and Guanine and Cytosine
are constant and equals one.
| 1. | Both Assertion and Reason are true and Reason correctly explains the Assertion. |
| 2. | Assertion is true but Reason is false. |
| 3. | Both Assertion and Reason are true but Reason does not correctly explain the Assertion. |
| 4. | Assertion is false but Reason is true. |
Subtopic: DNA Double Helix |
57%
From NCERT
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Consider the given two statements:
| Assertion (A): | There is, approximately, a uniform distance between the two strands of the double helix of DNA. |
| Reason (R): | A purine on one strand comes opposite to a pyrimidine on the other strand of the double helix of DNA. |
| 1. | Both (A) and (R) are True but (R) does not correctly explain (A) |
| 2. | (A) is False but (R) is True. |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are True and (R) correctly explains (A). |
Subtopic: DNA Double Helix |
77%
From NCERT
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Consider the given two statements:
| Assertion (A): | Euchromatin is said to be transcriptionally inactive chromatin. |
| Reason (R): | In a typical nucleus, euchromatin is the region of chromatin that is loosely packed and stains light. |
| 1. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 2. | (A) is False but (R) is True. |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are True and (R) correctly explains (A). |
Subtopic: DNA Packaging |
87%
From NCERT
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Consider the given two statements:
| Assertion: | Viruses grown in the presence of radioactive phosphorus will contain radioactive protein but not radioactive DNA. |
| Reason: | DNA contains phosphorus but protein does not. |
| 1. | Both Assertion and Reason are true and Reason correctly explains the Assertion. |
| 2. | Assertion is true but Reason is false. |
| 3. | Both Assertion and Reason are true but Reason does not correctly explain the Assertion. |
| 4. | Assertion is false but Reason is true. |
Subtopic: Search for Genetic Material:I |
86%
From NCERT
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Consider the given two statements:
| Assertion (A): | Among the two nucleic acids, the DNA and the RNA, DNA is a better genetic material. |
| Reason (R): | DNA chemically is less reactive and structurally more stable when compared to RNA. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | (A) is True but (R) is False. |
| 3. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 4. | (A) is False but (R) is True. |
Subtopic: Search for Genetic Material: II |
95%
From NCERT
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Consider the given two statements:
| Assertion (A): | RNA can directly code for the synthesis of proteins and can easily express the characters. |
| Reason (R): | DNA is dependent on RNA for synthesis of proteins. |
| 1. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 2. | (A) is False but (R) is True. |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are True and (R) correctly explains (A) . |
Subtopic: Search for Genetic Material: II |
76%
From NCERT
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Consider the given two statements:
| Assertion (A): | Deoxyribonucleoside triphosphates provide energy for polymerisation reaction during DNA replication. |
| Reason (R): | Energetically replication of DNA is a very expensive process. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | (A) is True but (R) is False. |
| 3. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 4. | (A) is False but (R) is True. |
Subtopic: DNA Replication: II |
From NCERT
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Consider the given two statements:
| Assertion (A): | On one strand, the template with polarity 3' - 5', the DNA replication is discontinuous, while on the other, the template with polarity 5' -3', it is continuous. |
| Reason (R): | The DNA-dependent DNA polymerases catalyse polymerisation only in one direction that is, 5' - 3'. |
| 1. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 2. | (A) is False but (R) is True. |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are True and (R) correctly explains (A). |
Subtopic: DNA Replication: II |
70%
From NCERT
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Consider the given two statements:
| Assertion (A): | If both strands of DNA act as a template, they would code for RNA molecule with different sequences. |
| Reason (R): | Complementarity does not mean identical. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | (A) is False but (R) is True. |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are True but (R) does not correctly explain (A) |
Subtopic: Transcription:II |
53%
From NCERT
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