Repair enzymes _____
a. repair only mutations that occur in mitochondrial DNA
b. repair only mutations that arise during replication
c. repair only DNA mismatch mutations
d. can only repair mutations that occur prior to replication
e. can only repair mutations that occur after replication
ANSWER: d
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Which group of organisms are hermaphrodites?
a. Elephants b. Hydras c. Aphids d. Lemon sharks e. Tapeworms
Researchers can deliver genes into plants by using
a. the bacterium Agrobacterium tumefaciens. b. microscopic particles coated with DNA. c. electric shocks. d. chemicals. e. all of these.
In plants, the light-dependent reactions require
A. NADP+. B. ATP. C. Calvin cycle enzymes. D. glucose. E. O2.
In humans, the allele for red-green color blindness is X-linked and recessive (Xr; the dominant allele is called XR). A man with normal color vision marries a color-blind woman who gives birth to a color-blind daughter
What can be inferred from this information? A) The woman is XRXr. B) The man must be a carrier for the color blindness allele. C) The daughter must be heterozygous. D) The man is probably NOT the father of the daughter.