If a single strand of mature messenger RNA contains 12 coding nucleotides, the protein that it will manufacture will have ___________ amino acids.
A. one
B. four
C. six
D. twelve
B. four
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Testosterone is an example of a chemical signal that affects the very cells that synthesize it, the neighboring cells in the testis, along with distant cells outside the gonads. Thus, testosterone is an example of _____
I) an autocrine signal II) a paracrine signal III) an endocrine signal A) only I and II B) only II and III C) only I and III D) I, II, and III
___________________ are organisms that derive energy from sunlight
A. Phototrophs B. Autotrophs C. Heterotrophs D. Chemotrophs E. Lithotrophs
If primary production increases in an ecosystem, it would be reasonable to expect that
A. nutrients are a limiting factor. B. gross production would not increase. C. cellular respiration would increase. D. the trophic web has become more complex. E. the biomass of herbivores would increase.
Where does the Calvin-Benson cycle occur?
a. Stroma b. Grana c. Cell wall d. Cristae e. Cell membrane