The enzyme responsible for replacing RNA primers with DNA is
A. DNA polymerase.
B. helicase.
C. topoisomerase II.
D. DNA ligase.
E. DNA replicase.
A
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A cross of pea plants, both heterozygous for seed shape and color traits, resulted in progeny in the ratio 9/16 round yellow (R_Y_), 3/16 round green (R_yy), 3/16 wrinkled yellow (rrY_), and 1/16 wrinkled green (rryy)
This result demonstrates that the: A. alleles responsible for seed color are segregating but those responsible for shape are not. B. alleles of seed shape and color are segregating independently. C. phenotypes corresponding to seed shape are segregating 1:2:1. D. alleles governing seed color display codominance. E. alleles for seed shape and color are linked.
During receptor-mediated endocytosis
a. plasma membrane receptors bind molecules to be enclosed. b. a small pit forms beneath the receptors. c. a pit closes back on itself. d. a vesicle forms. e. all of these occur
If the number of chromosomes in an animal's gametes is 20, then how many chromosomes would a somatic cell from that animal contain?
a. 10 b. 20 c. 40 d. 80
_____ is the term for a starting a new culture from an existing one.
Fill in the blank(s) with the appropriate word(s).