Q. No.The method of DNA replication in which two strands of DNA separate and synthesize new strands is called:
1.
Dispersive
2.
Conservative
3.
Semiconservative
4.
Non-conservative
Living beings maintain continuity of life by:
| 1. | Adaptation |
| 2. | DNA–replication and its transfer in the next generation |
| 3. | RNA synthesis |
| 4. | None of the above |
Which of the following is correct about H-bonding in nucleotide:
1. A–T G–C
2. A–G T–C
3. G–T A–C
4. A–A T–T
Chargaff's rule states that in an organism:
| 1. | The amount of adenine (A) is equal to that of thymine (T) and the amount of guanine (G) is equal to that of cytosine (C). |
| 2. | The amount of adenine (A) is equal to that of guanine (G) and the amount of thymine (T) is equal to that of cytosine (C). |
| 3. | The amount of adenine (A) is equal to that of cytosine (C) and the amount of thymine (T) is equal to that of guanine (G). |
| 4. | Amounts of all bases are equal. |
During translation initiation in prokaryotes, a GTP molecule is needed in:
| 1. | Formation of formyl-met-tRNA |
| 2. | Binding of 30S subunit of the ribosome with mRNA |
| 3. | Association of 30 S-mRNA with formyl met-tRNA |
| 4. | Association of 50 S subunit of the ribosome with the initiation complex |
In the genetic code dictionary, how many codons are used to code for all the 20 essential amino acids:
| 1. | 20 | 2. | 64 |
| 3. | 61 | 4. | 60 |
What does "lac" refer to in what we call the lac operon:
1. Lactose
2. Lactase
3. Lac insect
4. The number 1,00,000
Degeneration of a genetic code is attributed to the:
1. First member of a codon
2. Second member of a codon
3. Entire codon
4. Third member of a codon
During transcription, the DNA site at which RNA polymerase binds is called:
| 1. | Promoter | 2. | Regulator |
| 3. | Receptor | 4. | Enhancer |
What would happen if in a gene encoding a polypeptide of 50 amino acids, the 25th codon (UAU) is mutated to UAA?
| 1. | A polypeptide of 25 amino acids will be formed |
| 2. | Two polypeptides of 24 and 25 amino acids will be formed |
| 3. | A polypeptide of 49 amino acids will be formed |
| 4. | A polypeptide of 25 amino acids will be formed |
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