Q. No.Which of the following is required as inducer(s) for the expression of Lac operon?
1. lactose and galactose
2. glucose
3. galactose
4. lactose
1. lactose and galactose
2. glucose
3. galactose
4. lactose
A complex of ribosomes attached to a single strand of RNA is known as:
| 1. | Okazaki fragment | 2. | Polysome |
| 3. | Polymer | 4. | Polypeptide |
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Which of the following is not required for any of the techniques of DNA fingerprinting available at present?
| 1. | DNA -DNA hybridization | 2. | Polymerase chain reaction |
| 3. | Zinc finger analysis | 4. | Restriction enzymes |
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Taylor conducted experiments to prove the semiconservative mode of chromosome replication on:
| 1. | E. coli | 2. | Vinca rosea |
| 3. | Vicia faba | 4. | Drosophila melanogaster |
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DNA- dependent RNA polymerase catalyzes transcription on the strand of the DNA which is called the
1. Antistrand
2. Template strand
3. Coding strand
4. Alpha strand
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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 |
DNA fragments are:
1. Positively charged
2. Negatively charged
3. Neutral
4. Either positively or negatively charged depending on their size
During DNA replication, Okazaki fragments are used to elongate the :
1. leading strand towards the replication fork
2. lagging strand towards the replication fork
3. leading strand away from the replication fork
4. lagging strand away from the replication fork
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