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- Question
O2 binding to hemoglobin results in
Options- A. 100-fold higher affinity for the last O2 bound than for the first
- B. extensive protein conformational change
- C. both (a) and (b)
- D. 100-fold lower affinity for the last O2 bound than for the first
- Correct Answer
- both (a) and (b)
- 1. A biological redox reaction always involves
Options- A. an oxidizing agent
- B. a gain of electrons
- C. a reducing agent
- D. all of these Discuss
- 2. Which of the following is correct sequence of processes in the oxidation of glucose?
Options- A. Krebs cycle - glycolysis - electron transport
- B. Glycolysis - Krebs cycle - eletron transport
- C. Electron transport - Krebs cycle - glycolysis
- D. Krebs cycle - electron transport - glycolysis Discuss
- 3. RNA instability in alkaline solutions is due to
Options- A. adenine
- B. ribose
- C. uracil
- D. single strand nature Discuss
- 4. Cholestrol is the precursor of
Options- A. steroid hormones
- B. vitamin A
- C. bile salts
- D. both (a) and (c) Discuss
- 5. An isocratic elution in HPLC is one in which the composition of the solvent
Options- A. remains constant
- B. changes continuously
- C. changes in a series of steps
- D. none of these Discuss
- 6. What happens after glycolysis when oxygen is available as an electron acceptor?
Options- A. Pyruvate is formed
- B. NADH is produced
- C. Fermentation
- D. Oxidative phosphorylation Discuss
- 7. Nucleoside is a pyrimidine or purine base
Options- A. covalently bonded to a sugar
- B. ionically bonded to a sugar
- C. hydrogen bonded to a sugar
- D. none of the above Discuss
- 8. Specialized transduction occurs when
Options- A. the bacteriophage incorporates randomly in the bacterial chromosome
- B. the bacteriophage never incorporates into the bacterial chromosome
- C. the bacteriophage always incorporates at the same position in the bacterial chromosome
- D. none of the above Discuss
- 9. Polyprotic acids such as H3PO4, can act as acid-base buffers
Options- A. only in combination with polyprotic bases
- B. if their concentration is kept low
- C. at pH values around neutrality
- D. at pH values around any of their pKa's Discuss
- 10. Stereo chemical configuration of all a-amino acids derived from proteins is
Options- A. L
- B. D
- C. L and D
- D. None of these Discuss
More questions
Correct Answer: all of these
Correct Answer: Glycolysis - Krebs cycle - eletron transport
Correct Answer: ribose
Correct Answer: both (a) and (c)
Correct Answer: remains constant
Correct Answer: NADH is produced
Correct Answer: covalently bonded to a sugar
Correct Answer: the bacteriophage always incorporates at the same position in the bacterial chromosome
Correct Answer: at pH values around any of their pKa's
Correct Answer: L
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