Which of the following choices is not descriptive of a fast-twitch muscle fiber?
a. pale in color
b. produces ATP by lactate fermentation
c. no myoglobin
d. many mitochondria
d
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In the ZW system of sex determination (as in birds), a male is _____________ while a female is ______________
A. ZZ : ZW B. ZW : ZZ C. Z0 : ZW D. Z : ZW
In cancer cells, how are promoter regions silenced?
a. Histone acetylation makes DNA inaccessible. b. Repressors bind to the promoter region making it inaccessible to RNA polymerase. c. Methylation of cytosine DNA residues in CpG islands silences promoter regions. d. Promoters are excised by exonuclease.
Sequencing the genes of humans is important because
A) it provides information on how to build lipids in the cell. B) it will allow scientists to create human clones. C) knowing the nucleotide sequence of human genes will aid in the treatment of diseases caused by them. D) it will give us a better understanding of agricultural animals.
The ability to maintain a relatively constant internal environment
A) Ecosystem
B) Informed consent agreement
C) Epidemiologic studies
D) Critical thinking
E) Homeostasis
F) Metabolism
G) Placebo
H) Theory
I) Hypothesis
J) Adaptive trait