Oxygen and carbon dioxide are able to pass through the plasma membrane of a cell because
A) they are both polar molecules.
B) both are lipid soluble.
C) they move through ion pores.
D) each binds to a transport protein that "pulls" it across the membrane.
E) they are small and nonpolar and readily pass between phospholipids.
E
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A mutation that changes one particular amino acid into another can affect the functioning of other amino acids farther away in the primary sequence due to
A) the presence of prions. B) protein folding. C) jumping genes. D) the tendency for further mutations to occur.
Of all primates, which are genetically the closest to humans?
a. the great apes b. spider monkeys c. gibbons d. bonobos e. baboons
The part of a neuron that contains a nucleus and other organelles typical of cells is the ________
Fill in the blank(s) with correct word
2,4-D, a potent eudicot weed killer, is most likely a synthetic ____.
A. auxin B. gibberellin C. cytokinin D. phytochrome E. brassinosteroid