Which types of cells in the human body do not repair themselves if they have been damaged?
a. Skin
b. Bone
c. Blood
d. Hair
e. Nerve
e
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In a bacterial cell, the three genes of the lactose operon are
A) expressed continuously. B) expressed when lactose synthesis is required. C) expressed only in the presence of lactose. D) never expressed, because they are pseudogenes.
Why is whole-exome sequencing cheaper and faster than whole-genome sequencing?
a. It only sequences the proteins produces by the DNA. b. It only sequences the DNA’s short, non-coding regions. c. It only sequences the DNA’s coding, exon-producing regions. d. It only sequences the promoter regions.
Four of the five actions listed below are true of
testosterone. Select the exception. a. promotes secondary sex characteristics b. influences sexual behavior c. necessary for growth and function of male reproductive tract d. stimulates spermatogenesis e. produced by spermatogonia cells
Protist photosynthesis relies on
A) eyespots. B) silica. C) pseudopods. D) pseudoplasmodia. E) chloroplasts.