Q. No.Taylor conducted experiments to prove the semiconservative mode of chromosome replication on:
| 1. | E. coli | 2. | Vinca rosea |
| 3. | Vicia faba | 4. | Drosophila melanogaster |
In molecular biology, ‘rho [ρ] is a:
| 1. | 5' capping factor |
| 2. | polyadenylation factor |
| 3. | termination factor for transcription |
| 4. | An initiation factor for transcription |
During transcription, RNA polymerase holoenzyme binds to a gene promoter and assumes a saddle-like structure. What is its DNA-binding sequence?
| 1. | TIAA | 2. | AATI |
| 3. | CACC | 4. | TATA |
If there are 999 bases in RNA that code for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases, how many codons will be altered?
| 1. | 1 | 2. | 11 |
| 3. | 33 | 4. | 333 |
Identify the correct statement:
| 1. | The coding strand in a transcription unit is copied to an mRNA. |
| 2. | Split gene arrangement is characteristic of prokaryotes. |
| 3. | In capping, methylguanosine triphosphate is added to the 3' end of hnRNA. |
| 4. | RNA polymerase binds with the Rho factor to terminate the process of transcription in bacteria. |
Consider the following statements:
| I: | Inheritance of a character is affected by the promoter and regulatory sequences of a structural gene. |
| II: | The split-gene arrangement represents an ancient feature of the genome. |
| III: | The process of splicing represents the dominance of the RNA world. |
Which of the above statements are true?
| 1. | I and II only |
| 2. | I and III only |
| 3. | II and III only |
| 4. | I, II, and III |
Which of the following RNA should be most abundant in an animal cell?
| 1. | t-RNA | 2. | m-RNA |
| 3. | mi-RNA | 4. | r-RNA |
The template strand of a DNA molecule is 3’ – TAC – 5’. Which of the following anticodons of the tRNA molecule will hybridize with the codon of mRNA coded by this template?
| 1. | 3’ – TAC – 5’ | 2. | 5’ – AUG – 3’ |
| 3. | 5’ – CAU – 3’ | 4. | 5’ – UAC – 3’ |
Select the correct option:
|
The direction of RNA synthesis |
The direction of reading of the template DNA strand |
|
|
1. |
5' - 3' |
3' - 5' |
|
2. |
3' - 5' |
5' - 3' |
|
3. |
5' - 3' |
5' - 3' |
|
4. |
3' - 5' |
3' - 5' |
The initiation and termination factors required for prokaryotic transcription are respectively denoted as:
| 1. | α and β | 2. | δ and θ |
| 3. | σ and ρ | 4. | Ψ and ɸ |
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