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Home ‣ Biochemistry ‣ Antigen See What Others Are Saying!
  • Question

  • CD antigens


  • Options
  • A. allow leukocytes to recognize antigen
  • B. are each expressed on only one cell type
  • C. are expressed on immune cells to mark them for separation
  • D. function as receptors for cytokine and CAMs

  • Correct Answer
  • function as receptors for cytokine and CAMs 

    • More questions

    • 1. The lac operon is translated into __________ proteins.

    • Options
    • A. 1
    • B. 2
    • C. 3
    • D. 4
      • Discuss
    • 2. AUG codes for methionine act as a

    • Options
    • A. initiation code
    • B. elongation code
    • C. termination code
    • D. propagation code
      • Discuss
    • 3. The enzyme that joins DNA cuts is called

    • Options
    • A. joinase
    • B. ligase
    • C. DNA phosphorylase
    • D. reverse transcriptase
      • Discuss
    • 4. ATP is from which general category of molecules?

    • Options
    • A. Polysaccharides
    • B. Proteins
    • C. Nucleotides
    • D. Amino acids
      • Discuss
    • 5. a-amylose is similar to

    • Options
    • A. ?-sheets
    • B. ?-turned coils
    • C. ?-helices
    • D. the hydrophobic core
      • Discuss
    • 6. Clearly defined nucleus, mitochondria in a large central vacuole and chloroplasts, indicate the group of organisms from

    • Options
    • A. bacteria
    • B. fungi
    • C. plants
    • D. animals
      • Discuss
    • 7. How many classes of steroid hormones are there?

    • Options
    • A. 3
    • B. 2
    • C. 4
    • D. 5
      • Discuss
    • 8. Which of the following is not a type of signaling molecule?

    • Options
    • A. Testosterone
    • B. Insulin
    • C. Thyroxin
    • D. Adenylate cyclase
      • Discuss
    • 9. The reductant, NADH, transfers the electrons via a flavo-proteins to the specific disulfide (S-S) protein to form a dithiol (SH,SH) protein which converts vitamin

    • Options
    • A. B12(Co2+)to B12(Co)
    • B. B12(Co) to B12(Co2+)
    • C. B12(Co2+)to B12(Co+)
    • D. B12(Co+)to B12(Co2+)
      • Discuss
    • 10. Triacylglycerols are

    • Options
    • A. soluble in water
    • B. insoluble in water
    • C. soluble in water at elevated temperature
    • D. partially soluble in water
      • Discuss

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