Which of the following is a pyrimidine base found in DNA?
1. | Adenine | 2. | Guanine |
3. | Uracil | 4. | Cytosine |
Which of the following is also called soluble RNA?
1. | tRNA | 2. | rRNA |
3. | mRNA | 4. | siRNA |
A typical nucleosome unit consists of about:
1. | 60 base pairs | 2. | 140 base pairs |
3. | 200 base pairs | 4. | 400 base pairs |
At any instant, RNA is transcribed on which of the following strands of DNA?
1. | Coding strand | 2. | Template strand |
3. | Lagging strand | 4. | Leading strand |
To form a nucleoside, a nitrogenous base is linked to a pentose sugar:
1. | Through a P-Glycosidic linkage at carbon atom number 1 |
2. | Through a P-Glycosidic linkage at carbon atom number 5 |
3. | Through an N-Glycosidic linkage at carbon atom number 1 |
4. | Through an N-Glycosidic linkage at carbon atom number 5 |
The lac Y gene codes for permease, which increases the permeability of the cell to:
1. | Glucose | 2. | Galactose |
3. | cAMP | 4. | β-galactosides |
Nucleosomes constitute the repeating subunits of a structure in the nucleus called:
1. | Nucleoid | 2. | Chromatid |
3. | Solenoid | 4. | Chromatin |
In the genetic code, the codon UUC codes for:
1. | Methionine | 2. | Phenylalanine |
3. | Tyrosine | 4. | Valine |
Which of the following helps in the termination of transcription?
1. | Sigma factor | 2. | Translocase |
3. | Ubiquitin | 4. | Rho factor |
Which enzyme polymerizes RNA with defined sequences in a template independent manner?
1. | Peptidyl transferase |
2. | RNA polymerase |
3. | Reverse transcriptase |
4. | Polynucleotide phosphorylase |