Discussion
Home ‣ Biochemistry ‣ Enzymes See What Others Are Saying!
- Question
Common feature in all serine proteases is a
Options- A. hydrophobic specificity pocket
- B. hydrophilic specificity pocket
- C. cluster of reactive serine residues
- D. single reactive serine residue
- Correct Answer
- single reactive serine residue
- 1. A kinase is an enzyme that
Options- A. removes phosphate groups of substrates
- B. uses ATP to add a phosphate group to the substrate
- C. uses NADH to change the oxidation state of the substrate
- D. removes water from a double bond Discuss
- 2. Bisphosphoglycerate (BPG) cannot bind to the oxygenated R state of hemoglobin because
Options- A. it is displaced from the heme by oxygen
- B. it is displaced from the heme by movement of the proximal histidine
- C. its binding pocket becomes too small to accommodate BPG
- D. BPG binds to the R state with the same affinity as the T state Discuss
- 3. Which of the following occur in the presence of glucose?
Options- A. lac Z gene expression is increased
- B. cAMP increases
- C. Binding of CAP-cAMP complex to the promoter area decreases
- D. none of the above Discuss
- 4. What technique can be used to determine the murderer who left blood with the victim?
Options- A. DNA sequencing
- B. PCR amplification
- C. Western blot
- D. RFLP mapping Discuss
- 5. Which of the following statements about prokaryotes is false?
Options- A. Prokaryotic cells concentrate important materials for the cells survival
- B. The substance known as cytosol is found within the bacterial nucleus
- C. Prokaryotic cells are much smaller than most eukaryotic cells
- D. Ancient prokaryotes may have given rise to some eukaryotic organelles Discuss
- 6. Tubulin is regulated by
Options- A. binding of tubulin to tubulin mRNA
- B. splicing of the tubulin transcript
- C. binding of tubulin to the tubulin translational product
- D. binding of tubulin to DNA Discuss
- 7. Ascorbic acid acts as an
Options- A. reducing agent
- B. oxidizing agent
- C. oxidizing and reducing agent both
- D. none of the above Discuss
- 8. Cleavage of an IgG molecule by a specific protease can produce
Options- A. an antigen-binding site and two constant regions
- B. two heavy chain-light chain dimers
- C. an inactive mixture of oligopeptides
- D. two Fab fragments and one Fc fragment Discuss
- 9. Which of the following is in the lymph nodes of a person battling a cold virus?
Options- A. Huge numbers of white blood cells
- B. Trapped viruses that have been roaming the body
- C. Lymph ducts that enter and exit the nodes and Lymph fluid
- D. All of the above Discuss
- 10. If the enthalpy change for a reaction is zero, ?G° is equal to
Options- A. T?S°
- B. -T?S°
- C. -?H°
- D. lnKeq Discuss
More questions
Correct Answer: uses ATP to add a phosphate group to the substrate
Correct Answer: its binding pocket becomes too small to accommodate BPG
Correct Answer: Binding of CAP-cAMP complex to the promoter area decreases
Correct Answer: PCR amplification
Correct Answer: The substance known as cytosol is found within the bacterial nucleus
Correct Answer: binding of tubulin to the tubulin translational product
Correct Answer: reducing agent
Correct Answer: two Fab fragments and one Fc fragment
Correct Answer: All of the above
Correct Answer: -T?S°
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