ATP is called the "energy currency" of the cell
because it
a. looks like money.
b. accumulates in the body and is stored for
emergency use.
c. can be made into nucleic acids.
d. can be reused when it is energized during
phosphorylation.
e. is never out-of-date
D
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Of the enzymes associated with the metabolism of lactose with the lac operon, the one associated with transport of lactose into the cell is
A) ?-galactosidase. B) transacetylase. C) galactoside permease. D) ?-lactase. E) lactose translocase.
Turtles are thought to be living representatives of which of the following lineages?
a. anapsids b. archosaurs c. lepidosaurs d. synapsids e. diapsids
In a human male, the saclike structure that contains the testes is the
A. epididymis. B. vas deferens. C. scrotum. D. sustentacular cells. E. seminal vesicle.
Which statement is true?
a. The hydrogen bonding of cytosine to guanine is an example of complementary base pairing. b. Adenine always pairs up with guanine in DNA, and cytosine always teams up with thymine. c. Each of the four nucleotides in a DNA molecule has the same nitrogen-containing base. d. When adenine base pairs with thymine, they are linked by three hydrogen bonds. e. In the DNA of all species, the amount of cytosine never equals the amount of guanine.