When a ___ hormone carrier protein complex contacts the surface of a cell, the hormone is released
and penetrates directly through the plasma membrane.
a. peptide
b. steroid
c. protein
d. peptide and protein
e. peptide, steroid, and protein
A
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Temperate bacteriophages ____
a. kill their hosts during each cycle of infection b. infect only animals c. may enter an inactive phase in which they do not kill their host d. are enveloped viruses e. infect organisms living in temperate environments
When heterozygotes are favored over homozygotes __________ selection occurs
a. stabilizing b. directional c. disruptive d. frequency-dependent e. abnormal
While researching the effects of light on chlorophyll synthesis in sorghum, you find that brief pulses of red light stimulates the synthesis of chlorophyll a and b. This would suggest that chlorophyll synthesis is directed by the Pr form of phytochrome.
Answer the following statement true (T) or false (F)
The presence of Gram-negative diplococci in pus from an inflamed penis is diagnostic for infection by
A) human herpesvirus 2. B) Treponema pallidum. C) Neisseria gonorrhoeae. D) Chlamydia trachomatis. E) Mycoplasma hominis.