Storage of energy is a MAJOR function of
A. protein.
B. fats.
C. steroids.
D. nucleic acids.
B. fats.
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Chloroplasts ____
a. resemble photosynthetic bacteria b. utilize the same pigments regardless of what organism they are in c. apparently evolved from mitochondria d. utilize DNA derived from the nucleus e. are found in prokaryotes
The only antibody that can cross the placenta from mother to fetus.
What will be an ideal response?
What accounts for the majority of mass within a biomass pyramid of a lake?
a. plants b. snakes c. invertebrates d. small fish
e. large-mouth bassGiven that the enzymes that catalyze nitrogen fixation are inhibited by oxygen, what are two "strategies" that nitrogen-fixing prokaryotes might use to protect these enzymes from oxygen?
1. Couple them with photosystem II (the photosystem that splits water molecules). 2. Package them in membranes that are impermeable to all gases. 3. Be obligate anaerobes. 4. Be strict aerobes. 5. Package these enzymes in specialized cells or compartments that inhibit oxygen entry. A) 1 and 4 B) 2 and 4 C) 3 and 4 D) 3 and 5