Tag Archives: Biology

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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Correct Definition of Competitive Inhibition

What is the most correct definition of competitive inhibition?

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Can’t Touch This

What process is described by an animal’s ability to involuntarily contract a skeletal muscle without receiving a direct signal from the brain?

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Thy Kingdom Come

Organisms within the Kingdom Plantae have which of the following cellular components?

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Layer of the Epidermis

Which layer of the epidermis is the characterized by a low rate of mitosis and a high concentration of keratin?

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Cell Membranes

A blood cell is placed into a salt-water mixture (70% salt). What is likely to result if the red blood cell’s membrane is permeable to water?

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