The portion of the Y chromosome that determines male gender is known as ________.
What will be an ideal response?
SRY or "sex-determining region of the Y chromosome"
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Viroids are characterized by all of the following except
A) circular DNA. B) well-characterized transmission. C) self-replicating. D) latent forms exist in some genomes. E) associated with plant diseases.
A researcher tests the hypothesis that large, daily doses of vitamin C help protect against catching the common cold. What would be the best experimental and control group to test this hypothesis?
A. Experimental group: takes a large dose of vitamin C daily; Control group: takes nothing. B. Experimental group: people with a cold are administered vitamin C daily; Control group: people without a cold are not administered vitamin C. C. Experimental group: takes a large dose of vitamin C daily; Control group: takes a large weekly dose of vitamin C. D. Experimental group: takes a large, daily dose of vitamin C; Control group: takes a daily dose of a sugar pill disguised as vitamin C.
The diagram shows the rate of diffusion into a cell using carrier proteins.
Carrier proteins are saturated at which point?
A. 1 B. 2 C. 3 D. 4
All of the following are found in the cell walls of gram-positive bacteria EXCEPT_______
a. peptidoglycan b. teichoic acid c. lipid A d. N-acetylglucosamine e. lipoteichoic acid