The proton pump is the process of
A. producing glyceraldehyde-3-phosphate in the stroma.
B. forming ATP by creating a hydrogen ion gradient across a membrane.
C. converting fats and proteins into carbohydrates.
D. cellular respiration in plants.
B. forming ATP by creating a hydrogen ion gradient across a membrane.
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Questions of ____ and development are ____ explanations of behavior
Fill in the blank with the appropriate word.
When you are upright, what is the primary mechanism that propels blood in your feet back to your inferior vena cava?
A. recoil of elastic fibers in the walls of the leg veins B. contraction of the left ventricle of the heart C. contraction of smooth muscle in the walls of the leg veins D. contraction of skeletal muscles in your legs E. the valves in the leg veins alternating between open and closed
What is the purpose of plant hormones?
A) They are produced in small amounts but have great effects. B) They break down quickly after they are produced. C) They act only at the location where they are produced. D) They generally have one limited effect on the plant.
There are 20100 different possible sequence combinations for a protein chain with 100 amino acids. In addition to the amino acid sequence of the protein, what other factors increase the potential for diversity in these macromolecules?
(a) free rotation around single bonds during synthesis (b) noncovalent interactions sampled as protein folds (c) the directionality of amino acids being added (d) the planar nature of the peptide bond