In photosynthesis, NADH and NADPH are produced from NAD+ and NADP+ by
A) oxidation reactions.
B) reduction reactions.
C) both oxidation and reduction reactions.
D) neither oxidation nor reduction reactions.
Answer: B
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The immune system component with a principal role at point B in Figure 45-1 is:
a. memory cells. b. IgM antibodies. c. IgG antibodies. d. cytotoxic T cells. e. antibody IgA.
The ozone layer can be destroyed by pollutants such as
A) sulfur dioxide. B) CFCs. C) carbon monoxide. D) hydrocarbons and nitrogen oxides. E) carbon dioxide and oxygen.
In eukaryotes, mitochondria are the organelles primarily involved in
A. lipid synthesis. B. protein synthesis. C. energy release/capture. D. export of enzymes. E. phospholipid assembly.
Which statement about secondary growth in plants is correct? Select all that apply.A) Secondary growth in plants is a result of lateral meristems. Trees and shrubs have active lateral meristems.B) Secondary growth in plants increases the girth (diameter) of woody plants.C) Secondary growth in woody plants results from two cylinders of actively dividing cells, the cork cambium and vascular cambium.D) The cork cambium produces secondary phloem while the vascular cambium produces secondary xylem.E) Only some plants have secondary growth.
What will be an ideal response?