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biology 105 syllabus
Biology of Exercise
Quiz 2, part 3 Answers
Part C - Each of the following statements is FALSE. In one or two sentences (no more!), indicate why. (3 points each, 12 total)
1. All genes are expressed in all tissue in the bodies at all times.
No, different genes are expressed in different tissues (for example
the liver vs. the brain), at different times during the development of
an animal (for example in utero vs in the adult), and in response to difference
environmental stimuli (for example after exercise).
2. All food molecules are converted immediately to ATP in the body.
No, food molecules are broken down first into simple subunits, absorbed into the body, and then either converted to ATP, or converted to storage molecules. Converting all food directly to ATP would cause major problems because ATP is a poor storage molecule.
3. Alternate splicing of amino acid chains results in diversity in protein function.
No, RNA is splicing (introns are removed leaving only coding regions called exons). Amino acid chains are not spliced.
4. Lactic acid production is an excellent indicator that an athlete is below that anaerobic threshold.
No, lactic acid is produced during anaerobic metabolism and is an indication that the athlete is at or above the anaerobic threshold.