Which of the following is not usually an independent domain of an activator transcription factor?
a. ATPase
b. dimerization
c. DNA-binding
d. transcription activation
e. All of these are potential independent domains of an activator.
Ans: a
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A) hyperthermophilic B) aerobic metabolism C) small genome D) branching near the root of the evolutionary tree of life
The cell membranes of wall-less archaeons are strengthened by ________.
A. lipid-containing polysaccharide B. caldarchaeol C. glycoproteins D. All of the choices are correct.
In Figure 28-2, the zygote is the structure labeled:
a. 1.
b. 4.
c. 8.
d. 17.
e. 21.
In order for a muscle contraction to occur, cross-bridges must form between which one of the following structures within a muscle cell?
A) the plasma membrane and the sarcoplasmic reticulum B) troponin and tropomyosin C) calcium and tropomyosin D) acetylcholine and muscle cell receptors E) actin and myosin