Peripheral proteins are linked to either surface of the plasma membrane by:
a. covalent disulfide bonds.
b. associating with fatty acids through hydrophobic interactions.
c. associating with glycoproteins on the inner membrane surface.
d. bonding to integral proteins through noncovalent interactions.
e. embedding in one side of the membrane and, thus, not extending through to the other side.
d
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Which of the following statements is TRUE of restriction enzymes?
A. they are not naturally produced by bacteria, but are bioengineered by humans. B. they protect bacterial cells from invasion by foreign DNA. C. they cut at random sites within a genome. D. they cleave DNA only at sites of adjacent thymine bases. E. there are less than 10 restriction enzymes known.
The relationship between the yucca plant and the
yucca moth that pollinates it is a. camouflage. b. commensalism. c. competitive exclusion. d. mutualism. e. all of these.
Stanley Miller's experiment that applied electric sparks to a reducing atmosphere of methane, ammonia, water, and hydrogen showed that under these conditions,
a. nucleotides can form. b. amino acids can form. c. amino acids can polymerize into polypeptides. d. nucleotides can polymerize into nucleic acids.
Which type of cell has a nucleus and membrane bound organelles
What will be an ideal response?