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TLS Online TPP Program

#Question id: 542

Hamsters love to run on exercise wheels. Prolonged running at a high rate of speed requires ATP. Could a hamster with a defective gene for the enzyme lactate dehydrogenase meet the extra ATP demand for prolonged, fast wheel-running by maintaining a high rate of glycolysis? Why or why not?

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. No, not enough NAD+ can be regenerated for glycolysis to continue at a high rate.

  2. No, the defective gene will cause a rapid decline in pH in the muscles used for running.

  3. Yes, the defective enzyme has no effect on the glycolytic pathway.

  4. Yes, the enzyme alcohol dehydrogenase will supply the needed NAD+ if the lactose dehydrogenase cannot.

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TLS Online TPP Program

#Question id: 27133

#Unit 7. System Physiology – Animal

Increasing intracellular I – due to the action of NIS is an example of
TLS Online TPP Program

#Question id: 3754

#Unit 3. Fundamental Processes

Thymine makes up 28% of the nucleotides in a sample of DNA from an organism. Approximately what percentage of the nucleotides in this sample will be guanine?
TLS Online TPP Program

#Question id: 5323

#Unit 8. Inheritance Biology

An X-linked recessive gene produces red-green color blindness in humans. A woman with normal color vision whose father was color-blind marries a color-blind man. What is the probability that their son will be color-blind?
TLS Online TPP Program

#Question id: 19055

#Unit 13. Methods in Biology

In quantitative T.L.C radioactive material can be studied by 
TLS Online TPP Program

#Question id: 31016

#Unit 4. Cell Communication and Cell Signaling

Epinephrine binding to its receptor stimulates: