Which of the following statements best describes DNA polymerase?
A. It is an enzyme required to produce a primer needed for DNA replication.
B. It is an enzyme that catalyzes the addition of nucleotides to the 5? end of a growing DNA strand.
C. It is an enzyme that requires the presence of a small double-stranded nucleic acid primer to catalyze the addition of nucleotides to the 3? end of a growing DNA strand.
D. It is an enzyme required to glue pieces of DNA fragments together.
E. It is an enzyme that polymerizes to the DNA and keeps the replication fork open.
C. It is an enzyme that requires the presence of a small double-stranded nucleic acid primer to catalyze the addition of nucleotides to the 3? end of a growing DNA strand.
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Final protein refinements, storage, and packaging occur ________.
A. in the rough endoplasmic reticulum B. in the smooth endoplasmic reticulum C. in the Golgi apparatus D. in the cytoplasm
Sensory information is received by the ____
a. brain b. muscle c. gland d. skin e. heart
In humans, hair texture is an incompletely dominant trait. Curly is the dominant genotype, wavy is
heterozygous, and straight hair is recessive. What is the probable phenotypic ratio for a cross between a man with wavy hair and a woman with curly hair? A. All wavy hair B. 3/4 wavy hair; 1/4 straight hair C. 1/2 wavy hair; 1/2 curly hair D. All curly hair E. 1/4 curly hair; 1/2 wavy hair; 1/4 straight hair
Type I Helper T cells are involved in
A. innate immunity B. humoral immunity C. cell mediated immunity D. chemical nonspecific