Tag Archives: Biology

Nerve Impulse Propagation

The velocity of nerve impulse propagation could be increased by:

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Gastrin Secretion

Which of the following statements is NOT true regarding gastrin secretion and function?

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Decreasing Activity of an Enzyme

Some enzymes experience a decrease in activity proportional to the concentration of their products. This phenomenon could be an example of what process?

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Mechanism of Cyanide

The lethal poison cyanide causes death by interfering with cellular respiration. What is cyanide’s mechanism of toxicity?

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Mammalian Zygote

Once a mammalian zygote has become a blastocyst and implants itself into the uterine wall, it will develop into?

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Inhibition by Penicillin

Penicillin exerts its effect on bacterial growth through inhibition of cell-wall synthesis. This antibiotic blocks the last step in the formation of the cell wall. Glycopeptide transpeptidase is a bacterial enzyme that catalyzes the cross-linking reaction between peptidoglycan molecules, which are the main constituents of the cell wall. Penicillin inhibits the enzyme by binding covalently to its active site. The penicillin-enzyme complex cannot react further.

This is an example of:

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Genetic Drift Effects

Genetic drift is the process responsible for:

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Catabolic Process

Which of the following is an example of a naturally occurring catabolic process?

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Aldosterone Release

If the hormone aldosterone is released in the bloodstream, which of the following is most likely to occur?

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Heart In Systole

Which of the following occurs when the heart is in systole?

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