The cell walls of eukaryotes are usually composed of

A. peptidoglycan
B. polysaccharides
C. teichoic acid
D. mycolic acid
E. minerals


Answer: B

Biology & Microbiology

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The reagent used in the "string test" is:

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The division of cytoplasm is accomplished during

a. prokaryotic fission. b. interphase. c. meiosis. d. cytokinesis. e. karyokinesis.

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Jane is a 20-year-old individual who externally resembles a female but who is actually genetically a male (XY). Based on your knowledge of human development, how could this be possible?

A) Although Jane is genetically a male, she has produced an abnormal amount of estrogen since birth. B) During development, Jane's body produced an excessive amount of testosterone, leading to the development of female external genitalia. C) Jane's embryonic gonads did not produce androgens, or they lacked functional testosterone receptors. D) Due to a genetic defect, Jane lacks sufficient aromatase activity, the enzyme that converts testosterone into estrogen.

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Which of the following is used in both food production and industrial fermentation?

A. Bacillus thuringiensis B. Escherichia coli C. Listeria monocytogenes D. Pseudomonas syringae E. Saccharomyces cerevisiae

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