Avogadro's number represents the ____
a. number of grams in a mole of substance
b. number of moles in a gram of substance
c. number of atoms in one gram of substance
d. atomic weight of an atom divided by the weight of an atom of that element
e. weight of an atom of an element divided by the atomic weight of that element
ANSWER: d
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A __________ is a virus that infects only bacteria. Fill in the blank(s) with the appropriate word(s)
Which of the following attributes is the most critical for increasing the chance of cospeciation of parasite and host?
a. The life history of parasite and host are tightly linked. b. The parasite and host are coevolving. c. The parasite adjusts its life cycle to its host's life cycle. d. The parasite is only transmitted vertically from parent to offspring.
Which of the following statements about quaternary structure is not correct?
A. A homotrimer consists of three identical protomers. B. Identical polypeptides can create a functional protein. C. A ribosome can be considered an oligomer. D. All functional proteins have a quaternary structure. E. Less DNA is required to code for a 70,000 molecular weight homotrimer than a 70,000 molecular weight homodimer.
Breaking actin-myosin bonds requires
a. ATP. b. ADP. c. calcium. d. phosphorus. e. sodium