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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 


  • More questions

    • 1. Deoxyribonucleoside triphosphates, being need in the chain termination methods are

    • Options
    • A. dATP
    • B. dGTP and dCTP
    • C. dTTP
    • D. all of these
    • Discuss
    • 2. When a __________ reaches its __________ , there is a specific means of receiving it and acting on the message. This task is the responsibility of specialized proteins called __________ .

    • Options
    • A. signaling molecule; receptor; G proteins
    • B. signaling molecule; target cell; G proteins
    • C. signaling molecule; target cell; receptors
    • D. kinase; receptor; proteases
    • Discuss
    • 3. In hemoglobin, allosteric effects occur

    • Options
    • A. only in humans
    • B. for maintaining Fe in the Fe2+ state
    • C. to minimize oxygen delivery to the tissues
    • D. to maximize oxygen delivery to the tissues
    • Discuss
    • 4. Which of the following white blood cells act as scavengers when they engulf and digest pathogens?

    • Options
    • A. Macrophages
    • B. T cells
    • C. B cells
    • D. Lymphocytes
    • Discuss
    • 5. An antigen preparation and an antibody preparation are tested by immunodiffusion. Three bands are found, indicating that

    • Options
    • A. there was more than one antigen
    • B. the antibody was impure
    • C. the temperature was too high
    • D. there was one antibody and one antigen
    • Discuss
    • 6. Each tRNA molecule has a cloverleaf secondary structure consisting of

    • Options
    • A. three stem loops
    • B. two stem loops
    • C. four stem loops
    • D. either (a) or (b)
    • Discuss
    • 7. Which polymerase is active in DNA repairing

    • Options
    • A. Polymerase I
    • B. Polymerase II
    • C. Polymerase III
    • D. none of these
    • Discuss
    • 8. What type of B cell is like a tiny factory that produces antibodies identical to the B cell receptor that bind to the original antigen?

    • Options
    • A. T cells
    • B. Memory cells
    • C. Plasma cells
    • D. Macrophages
    • Discuss
    • 9. Each replication bubbles consists of

    • Options
    • A. 3 replication forks
    • B. 2 replication forks
    • C. 4 replication forks
    • D. 1 replication forks
    • Discuss
    • 10. Selenium is an essential component of the enzyme glutathione peroxidase which

    • Options
    • A. scavenges toxic hydoperoxycompounds in tissues
    • B. reduces toxic hydoperoxycompounds in tissues
    • C. oxidizes toxic hydoperoxycompounds in tissues
    • D. none of the above
    • Discuss


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