51. The three major components in a nucleotide are
A. a carboxyl group, an R group, and an amino group.
B. glucose, a nitrogen base, and a phosphate group.
C. a nitrogen base, a six-carbon sugar, and a phosphate group.
D. a nitrogen base, a five-carbon sugar, and a phosphate group.
E. glucose, a fatty acid, and glycerol.
D. a nitrogen base, a five-carbon sugar, and a phosphate group.
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What characteristic of carrier female 2 from generation III predisposed her to produce fragile X offspring at a higher proportion than did her grandmother, the carrier female of generation I?
1.random chance
2.female I-2 was phenotypically normal but her granddaughter, female III-2, was not
3.permutation alleles transmitted by males tend to remain stable or decrease while those transmitted by females become fully mutant alleles
4.permutation alleles transmitted by females tend to remain stable or decrease while those transmitted by males become fully mutant alleles
Dictyostelium discoideum is an unusual organism, one that straddles the boundary between the unicellular and the multicellular. Its feeding phase consists of individual amoeba-like cells that move independently, feeding on bacteria by phagocytosis. When the food runs out, cells begin to aggregate into a multicelled structure that migrates toward light. The cells differentiate into a base, stalk, and spores; only the spores survive to colonize a new habitat. Dictyostelium discoideum is which of the following?
a. A protozoa b. An apicomplexan c. An algae d. A diatom e. A slime mold
If one strand of DNA has the sequence 5’-CCGTAGCA-3’, the complementary strand would be written as
____________________. Fill in the blank(s) with the appropriate word(s).
A(n) ________ involves drug testing on humans
Fill in the blank(s) with correct word