This arthropod is a filter feeder, a
hermaphrodite, and the only arthropod that
secretes an external shell. This arthropod is
___.
a. an isopod
b. a barnacle
c. a centipede
d. a krill
e. more than one of these
B
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During the initiation step of transcription, which molecule binds the promoter region of a DNA molecule?
A) DNA polymerase B) Reverse transcriptase C) RNA polymerase D) DNA primase E) Topoisomerase
Evaluate this statement: Cholesterol is a type of lipid, and thus all cholesterol lipids are bad for human health
A) True, because high levels of cholesterol lead to increased heart disease. B) True, because high levels of cholesterol lead to obesity. C) False, because some types cholesterol increase heart disease, but other types are necessary, especially in the plasma membrane. D) False, because cholesterol levels are not related to human health.
When the human gene coding for insulin is introduced into a mouse embryo, the gene is correctly expressed in the
appropriate tissue. This shows that:a. tissue-specific gene expression is highly conserved during evolution. b. the introduced gene was edited by the mouse embryo for proper function. c. the introduced gene was exactly the same as the mouse gene for insulin. d. mice and humans are not closely related. e. mouse genes are not tissue specific.
Which of the following can be absorbed directly into the bloodstream?
A) Large proteins B) Fats C) Polysaccharides D) Triglycerides E) Amino acids