In a strand of nucleic acid, two nucleotides are linked together by:
1. 3’ – 5’ phosphodiester bond
2. 5’ – 3’ phosphodiester bond
3. 2’ – 5’ phosphodiester bond
4. 3’ – 1’ phosphodiester bond
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
In Griffith's experiment, which of the following bacterial strains was capable of causing pneumonia in mice?
1. | Live R |
2. | Bacteria strain with polysaccharide coat |
3. | Heat Killed S |
4. | Live R with capsule and Heat Killed S |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
What facilitates the opening of the helix during the elongation step of transcription?
1. | RNA polymerase | 2. | Helicase |
3. | Topoisomerase | 4. | Gyrase |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
The repressor of the lac operon is:
1. | Lactose itself | 2. | A steroid |
3. | Synthesized constitutively | 4. | A product of structural gene |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
The base pairing in a double stranded DNA is correctly described as:
1. | Similar | 2. | Identical |
3. | Complementary | 4. | Synergistic |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
In a transcription unit, RNA polymerase binds to:
1. | Ori | 2. | Promoter |
3. | Operator | 4. | Structural gene |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
The distance between a base pair in the DNA double helix is approximately:
1. | 2.0 nm | 2. | 0.34 nm |
3. | 20 nm | 4. | 3.4 nm |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
Transcription and translation can be coupled in:
1. | Bacteria | 2. | Yeast |
3. | Plants | 4. | Animals |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
In some viruses, the flow of genetic information is from RNA to DNA. These viruses are:
1. | Reverse transcriptases | 2. | Reoviruses |
3. | Ribozymes | 4. | Retroviruses |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
In a transcription unit, with respect to structural genes, the promoter is located:
1. | Upstream and 5’ | 2. | Upstream and 3’ |
3. | Downstream and 5’ | 3. | Downstream and 3’ |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.