Which among the following is the least

effective means of contraception?



a. abstinence
b. rhythm method
c. condom
d. douching
e. spermicides


D

Biology & Microbiology

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The genus Arthrobacter has a distinctive growth cycle in which branched rod-shaped bacteria are produced in the exponential phase, and cocci are found in stationary phase cultures.

Answer the following statement true (T) or false (F)

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Cellulose belongs to which of the following groups of macromolecules?

A) lipids B) carbohydrates C) proteins D) nucleic acids E) none of the above

Biology & Microbiology

The brain maintains information on how things should be operating. This information is based on

a. receptors. b. integrators. c. feedback. d. set points. e. regulators.

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Which of the following statements about plant hormones is false?

a. They are organic compounds that act as a highly specific chemical signal. b. They are effective in extremely small amounts. c. They elicit many different responses. d. They stimulate a response at one concentration and inhibit that same response at a different concentration. e. They can be categorized into seven major classes.

Biology & Microbiology