Some herbicides, such as paraquat, cause oxidation of NADPH to NADP+. How does paraquat interfere with plant energy metabolism?
What will be an ideal response?
Answer: By oxidizing NADPH to NADP directly, the amount of NADPH available for the Calvin cycle is minimized, and the plant literally starves to death.
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Basic microbiology can be used to
A) probe the fundamental processes of life. B) study characteristics of cells of multicellular organisms. C) model our understanding of cellular processes in multicellular organisms, including humans. D) probe the fundamental processes of life, study characteristics of cells of multicellular organisms, and model our understanding of cellular processes in multicellular organisms, including humans.
The most serious type of mutation is a ________ mutation.
A. frameshift B. point C. silent D. back
In humans, the gonads ____
a. produce gametes only b. secrete hormones only c. nourish the embryo only d. produce gametes and secrete hormones only e. produce gametes, secrete hormones, and nourish the embryo
the tube that links the pharynx and the stomach is the
What will be an ideal response?