How many types of histone proteins are there?

A. 4
B. 5
C. 7
D. 8


B

Biology & Microbiology

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An IPSP occurs when:

A. ligand-gated chloride channels open. B. ligand-gated calcium channels open. C. voltage-gated chloride channels open. D. both ligand- and voltage-gated chloride channels open.

Biology & Microbiology

Which tissue acts to transport nutrients and wastes throughout the body?

a. blood b. adipose tissue c. loose connective tissue d. fibrous connective tissue e. cartilage

Biology & Microbiology

The sex of most mammals, birds, and insects is determined by:

a. the temperature. b. the external environment. c. sex chromosomes. d. chance. e. the internal envronment.

Biology & Microbiology

A genomic library is a collection of ________ that contains DNA fragments representing most, if not all, of the genome of an organism

Fill in the blank with correct word.

Biology & Microbiology