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- Question
The conformational changes from the T to the R state is initiated by
Options- A. binding of oxygen to the heme
- B. movement of the proximal histidine towards the heme
- C. movement of the F-helix, which contains the proximal His
- D. reorganization of protein-protein contacts between the individual subunits
- Correct Answer
- binding of oxygen to the heme
- 1. Restriction maps
Options- A. allows comparison between DNA molecules without the need to determine nucleotide sequence
- B. allows comparison between DNA molecules but requires to determine nucleotide sequence
- C. does not allow comparison between DNA molecules
- D. none of the above Discuss
- 2. The transport of acyl-CoA for oxidation using a shuttle involves formation of the intermediate
Options- A. 3 acetyl-CoA
- B. Acyl-coenzyme A
- C. acyl-carnitine
- D. None of these Discuss
- 3. Why must the voltage supplied to a tungsten lamp be very stable?
Options- A. Because if it wasn't, the lamp would bum out
- B. Because amount of energy the lamp emits is proportional to the fourth power of the operating voltage
- C. Because the lamp will only function at a specific voltage
- D. All of the above Discuss
- 4. Which site of the tRNA molecule binds to the mRNA molecule?
Options- A. Anticodon
- B. Codon
- C. Amino acid
- D. 5 prime end Discuss
- 5. A deficiency of thiamin produces the disease known as
Options- A. beri-beri
- B. scurvy
- C. cataract
- D. anemia Discuss
- 6. Normal glucose metabolism requires
Options- A. chromium
- B. manganese
- C. magnesium
- D. calcium Discuss
- 7. Promoters for tRNAs are located
Options- A. upstream from the start codon
- B. downstream from the start codon
- C. both (a) and (b)
- D. none of these Discuss
- 8. What is the end product of leucine metabolism?
Options- A. Acetyl-CoA
- B. Pyruvic acid
- C. Oxaloacetic acid
- D. Acetyl carnitine Discuss
- 9. Crick demonstrated that the genetic code involved three bases and suggested that the code was degenerated. What experimental technique Crick conducted to suggest genetic code degeneration?
Options- A. Gel electrophoresis
- B. Density gradient centrifugation
- C. Frameshift mutagenesis
- D. Restriction digests of the rII gene Discuss
- 10. A monoclonal antibody (mAb) specific for the 2,4-dinitrophenyl (DNP) hapten might also bind
Options- A. Leu or Ileu
- B. His or Pro
- C. Tyr or Phe
- D. Ser or Thr Discuss
More questions
Correct Answer: allows comparison between DNA molecules without the need to determine nucleotide sequence
Correct Answer: acyl-carnitine
Correct Answer: Because amount of energy the lamp emits is proportional to the fourth power of the operating voltage
Correct Answer: Anticodon
Correct Answer: beri-beri
Correct Answer: chromium
Correct Answer: downstream from the start codon
Correct Answer: Acetyl-CoA
Correct Answer: Frameshift mutagenesis
Correct Answer: Tyr or Phe
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