The antibody-binding site of an antibody is made up of
A. portions of both of the heavy chains only.
B. the variable regions of the heavy chains.
C. the light chains only.
D. the variable regions of both light and heavy chains.
E. one heavy chain.
Answer: D
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A testcross is used to
a. determine if a parent with a dominant trait is heterozygous or homozygous. b. determine which allele is dominant. c. determine if the progeny of an experimental cross will get a random assortment of alleles. d. prove that an organism is true-breeding. e. cross an individual with a dominant phenotype with a homozygous dominant individual to prove the alleles are indeed dominant.
Genes that are ________ on chromosomes get separated by crossing over ________ frequently
a. farther apart / less b. farther apart / more c. none of the choices d. closer together / more
DNA replication occurs
a. during both mitosis and meiosis. b. only during mitosis. c. only during meiosis. d. during the S phase. e. during G2.
LDL's transport the cholesterol to
What will be an ideal response?