The role of the antenna complex in a photosystem is to
A. transfer excited electrons to the primary electron acceptor.
B. generate glucose.
C. generate NADPH.
D. capture photons from sunlight.
D. capture photons from sunlight.
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Most cancers require at least two mutations: 1) one in an oncogene, which encodes proteins that trigger cell division,
and 2) one in a tumor suppressor gene, whose protein products, in their unmutated form, play a key role in preventing the cell cycle from progressing if the DNA is damaged or in the absence of specific cues. Which class of proteins might be considered tumor suppressors?
a. Cdk inhibitors b. cyclins c. growth factor receptors d. microtubules e. transcription factors
Gamma interferon is used to treat
a. herpes infections. b. multiple sclerosis. c. measles. d. mumps. e. hepatitis C.
Which type of adaptation is most likely to occur over evolutionary time?
a) one that increases the physiological complexity and sophistication of the individuals in a population b) one that increases the physiological simplicity of the individuals in a population c) one that causes the individuals in a population to more closely resemble humans d) one that causes the individuals in a population to more efficiently reproduce in the environment in which they live e) one that causes the individuals in a population to have greater intelligence
Characteristics of Histoplasma capsulatum include
A. it grows in dry, arid soil. B. it is a yeast with a capsule. C. it grows in moist soil, rich in nitrogen from bird and bat guano. D. it is a dermatophyte. E. None of the choices are correct.