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Home ‣ Biochemistry ‣ Structure and Properties of Amino Acids See What Others Are Saying!
- Question
Amino acids required in the human diet and not synthesized by the body are called
Options- A. specialized
- B. trace
- C. essential
- D. accessory
- Correct Answer
- essential
- 1. Lysozymes are found in
Options- A. plant cells
- B. animal cells
- C. microbial cells
- D. all of these Discuss
- 2. Transcription of each set of rRNA genes by RNA polymerasel produces
Options- A. a single 45S rRNA precursor molecule
- B. a single 5S rRNA precursor molecule
- C. a single 18S rRNA precursor molecule
- D. a single 28S rRNA precursor molecule Discuss
- 3. The rapid appearance of HIV-1 strains that are resistant to AIDS drugs is due in part to which of the following property of its reverse transcriptase?
Options- A. AZT (zidovudine) is too expensive to be taken in effective doses
- B. The RNase H domain of p66 causes error prone synthesis
- C. It lacks a proofreading exonuclease
- D. It has low affinity for the correct dNTP's Discuss
- 4. Which of the following is found on RNA but not DNA?
Options- A. Uracil
- B. Deoxyribose
- C. Phosphate
- D. Adenine Discuss
- 5. Small charged molecules, often biogenic amines function as
Options- A. hormones
- B. neurotransmitters
- C. both (a) and (b)
- D. none of these Discuss
- 6. 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
- 7. 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
- 8. Which of these is a symptom of vitamin A deficiency?
Options- A. Osteoporosis
- B. Impaired taste perception
- C. Blindness
- D. Impaired blood clotting Discuss
- 9. 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
- 10. 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
More questions
Correct Answer: plant cells
Correct Answer: a single 45S rRNA precursor molecule
Correct Answer: It lacks a proofreading exonuclease
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
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