Which one of the following makes use of RNA as a template to synthesize DNA:
1. DNA dependant RNA polymerase
2. DNA polymerase
3. Reverse transcriptase
4. RNA polymerase
Protein synthesis in an animal cell occurs:
1. | On ribosomes present in cytoplasm as well as in mitochondria |
2. | On ribosomes present in the nucleolus as well as in the cytoplasm |
3. | Only on ribosomes attached to the nuclear envelope and endoplasmic reticulum |
4. | Only on the ribosomes present in the cytosol |
Production of a human protein in bacteria by genetic engineering is possible because:
1. | Bacterial cells can carry out the RNA splicing reactions |
2. | The mechanism of gene regulation is identical in humans and bacteria |
3. | The human chromosome can replicate in bacterial cell |
4. | The genetic code is universal |
During transcription holoenzyme RNA polymerase binds to a DNA sequence and the DNA assumes a saddle like structure at the point. What is the sequence called -
1. CAAT box
2. GGTT box
3. AAAT box
4. TATA box
A cup has bacterial cells. Each bacterial cell divides in 35 minutes. What shall be the number of bacteria after 175 min?
1. | \(2 \times 10 ^ 5\) | 2. | \(5 \times 10 ^ 5\) |
3. | \(32 \times 10 ^ 5\) | 4. | \(16 \times 10 ^ 5\) |
Which of the following exercises control over transcription:
1. Operator
2. Regulator
3. Promoter
4. Recon
Transduction in bacteria is carried out by:
1. Bacteriophage
2. B.G.A.
3. Mycoplasma
4. Rickettsiae
Variations in proteins are due to:
1. Sequence of amino acids
2. Number of amino acids
3. R–group
4. None
Segments of DNA which can move in a genome:
1. Transposons
2. Introns
3. Exons
4. Cistrons
A sequence of how many nucleotides in messenger RNA make a codon for an amino acid:
1. Four
2. One
3. Two
4. Three