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Home Biochemistry Vitamins and Coenzymes See What Others Are Saying!
  • Question
  • Which of these hormones is a catecholamine?


  • Options
  • A. Follitropin
  • B. Norepinephrine
  • C. Tetraiodothyronine
  • D. Tetrahydrofolate

  • Correct Answer
  • Norepinephrine 


  • More questions

    • 1. Nucleoside is a pyrimidine or purine base

    • Options
    • A. covalently bonded to a sugar
    • B. ionically bonded to a sugar
    • C. hydrogen bonded to a sugar
    • D. none of the above
    • Discuss
    • 2. Specialized transduction occurs when

    • Options
    • A. the bacteriophage incorporates randomly in the bacterial chromosome
    • B. the bacteriophage never incorporates into the bacterial chromosome
    • C. the bacteriophage always incorporates at the same position in the bacterial chromosome
    • D. none of the above
    • Discuss
    • 3. Polyprotic acids such as H3PO4, can act as acid-base buffers

    • Options
    • A. only in combination with polyprotic bases
    • B. if their concentration is kept low
    • C. at pH values around neutrality
    • D. at pH values around any of their pKa's
    • Discuss
    • 4. Stereo chemical configuration of all a-amino acids derived from proteins is

    • Options
    • A. L
    • B. D
    • C. L and D
    • D. None of these
    • Discuss
    • 5. Bacterial protein called catabolic activator protein (CAP) is an example of

    • Options
    • A. negative control of gene expression
    • B. positive control of gene expression
    • C. second type of positive control of gene expression
    • D. none of the above
    • Discuss
    • 6. A mutation in the tip binding site of the repressor would result in

    • Options
    • A. constitutive trp operon expression
    • B. inducible trp operon expression
    • C. no operon expression
    • D. none of the above
    • Discuss
    • 7. PCR is an abbreviation for

    • Options
    • A. Protein Change Reaction
    • B. Polymerase Chain Reaction
    • C. Positive Charge Reaction:
    • D. Preliminary Change Rate
    • Discuss
    • 8. According to the fluid mosaic model of cell membranes,

    • Options
    • A. the most common type of molecules in the membrane are proteins
    • B. basic membrane structure results from how the proteins interact with water
    • C. the membrane is a highly mobile mixture of phospholipids and proteins
    • D. the unique properties of cell types are determined by their phospholipids
    • Discuss
    • 9. Which of the following is correct?

    • Options
    • A. Membranes form boundaries around the cell and distinct subcellular components
    • B. Membranes act as selectively permeable barrier
    • C. Membranes contain varying amount of lipid and protein and some contain small amount of carbohydrates
    • D. All of the above
    • Discuss
    • 10. Cholesterol is essential for normal membrane functions because it

    • Options
    • A. plugs up the cardiac arteries of older men
    • B. cannot be made by higher organisms
    • C. keeps membranes fluid.
    • D. spans the thickness of the bilayer
    • Discuss


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