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- Question
DNA helicase is used to
Options- A. unwind the double helix
- B. interact the double helix closely
- C. break a phosphodiester bond in DNA strand
- D. none of the above
- Correct Answer
- unwind the double helix
- 1. Which of the following is found on RNA but not DNA?
Options- A. Uracil
- B. Deoxyribose
- C. Phosphate
- D. Adenine Discuss
- 2. Small charged molecules, often biogenic amines function as
Options- A. hormones
- B. neurotransmitters
- C. both (a) and (b)
- D. none of these Discuss
- 3. What useful information can be found from a Van Deemter plot?
Options- A. The selectivity factor
- B. Optimum mobile phase flow rate
- C. Optimum column temperature
- D. Optimum column length Discuss
- 4. For a typical adsorbent such as silica gel, the most popular pore diameters are
Options- A. 10 and 50 A°
- B. 60 and 100 A°
- C. 100 and 150 A°
- D. 150 and 200 A° Discuss
- 5. Which of these is a symptom of vitamin A deficiency?
Options- A. Osteoporosis
- B. Impaired taste perception
- C. Blindness
- D. Impaired blood clotting Discuss
- 6. A protein that shows infinite cooperative for binding of n ligands will
Options- A. show a Hill coefficient (nH) of 0.0
- B. only be found in either the unliganded form or the fully liganded form
- C. show a Hill coefficient (nH) of n
- D. both (b) and (c) Discuss
- 7. Biotin occurs mainly in combined forms bound to protein through
Options- A. ?-N-lysine moiety
- B. ?-S-lysine moiety
- C. ?-N-biotinyl-L-lysine
- D. ?-N-lipoyl - L-lysine Discuss
- 8. Which of the following produces the antibodies employed in the specific immune response of vertebrates?
Options- A. B lymphocytes
- B. T lymphocytes
- C. Neutrophils
- D. Macrophages Discuss
- 9. DNA segments capable of moving from one place in the genome to another is known as
Options- A. transposons
- B. retrovirus
- C. introns
- D. moving elements Discuss
- 10. TM refers to the temperature at which
Options- A. membranes are 50% fluid
- B. 50% of a DNA molecule is denatured
- C. 50% of a protein molecules are denatured
- D. all of the above Discuss
More questions
Correct Answer: Uracil
Correct Answer: both (a) and (b)
Correct Answer: Optimum mobile phase flow rate
Correct Answer: 60 and 100 A°
Correct Answer: Blindness
Correct Answer: both (b) and (c)
Correct Answer: ?-N-lysine moiety
Correct Answer: B lymphocytes
Correct Answer: transposons
Correct Answer: all of the above
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