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Home ‣ Biochemistry ‣ Enzymes See What Others Are Saying!
- Question
Tryprotophan synthetase of E.coli, a typical bifunctional oligomeric enzyme consist of
Options- A. a protein designated A
- B. two proteins designated A and B
- C. a protein A and one-subunit a
- D. a protein designated B
- Correct Answer
- two proteins designated A and B
- 1. In the past, IR spectra had to be aquired one wavelength at a time, which took a long time. Today quick spectra is due to the
Options- A. the Fourier Transfer Algorithm allows us to scan all frequencies at once
- B. light is faster today that it used to be
- C. absence of broad spectrum of wavelenth
- D. none of the above Discuss
- 2. An early sign of retinol deficiencies in man is
Options- A. night blindness
- B. keratinization
- C. xeropthalmia
- D. none of these Discuss
- 3. Arachidonate has 20 carbon atoms with
Options- A. 3 double bonds
- B. 2 double bonds
- C. 4 double bonds
- D. 8 double bonds Discuss
- 4. Lysine is degraded to acetoacetyl CoA and is described as a
Options- A. ketogenic amino acid
- B. glucogenic amino acid
- C. keto-gluco amino acid
- D. none of these Discuss
- 5. The hormones, glucagon and epinephrine, stimulate glycogen breakdown to G-6-P
Options- A. only in the liver
- B. using ATP as the phosphoryl donor
- C. directly, by binding to glycogen phosphorylase
- D. indirectly, by first stimulating adenylate cyclase to make cAMP Discuss
- 6. Vitamin B12 is useful in the prevention and treatment of
Options- A. pernicious anemia
- B. scurvy
- C. cataract
- D. beri-beri Discuss
- 7. Which pyrimidine base contains an amino group at carbon 4?
Options- A. Cytosine
- B. Thymine
- C. Uracil
- D. Adenine Discuss
- 8. Molar absorbtivity is the measure of the
Options- A. amount of light absorbed per unit length
- B. amount of light absorbed per unit concentration
- C. amount of light reflected and absorbed per unit concentration
- D. None of the above Discuss
- 9. Which of the following is not a sensible grouping of amino acids based on their polarity properties?
Options- A. Ala, Leu, and Val
- B. Arg, His, and Lys
- C. Phe, Trp, and Tyr
- D. Asp, Ile, and Pro Discuss
- 10. Agarose a porous matrix used in various molecular biology technique is made by repetitive units of
Options- A. maltose
- B. agarobiose
- C. agar
- D. none of these Discuss
More questions
Correct Answer: the Fourier Transfer Algorithm allows us to scan all frequencies at once
Correct Answer: night blindness
Correct Answer: 4 double bonds
Correct Answer: ketogenic amino acid
Correct Answer: indirectly, by first stimulating adenylate cyclase to make cAMP
Correct Answer: pernicious anemia
Correct Answer: Cytosine
Correct Answer: amount of light absorbed per unit concentration
Correct Answer: Asp, Ile, and Pro
Correct Answer: maltose
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