An important characteristic of the double-stranded DNA molecule is that ___________.

A. DNA is composed of amino acids linked together by peptide bonds that form a double helix.
B. DNA contains four nucleotides: cytosine, uracil, adenine, and guanine.
C. Phosphodiester bonds are formed between bases in opposing DNA strands to form a double helix.
D. Hydrogen bonding between base pairs is responsible for formation of a double helix.


D. Hydrogen bonding between base pairs is responsible for formation of a double helix.

Biology & Microbiology

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What is the name of the neurotransmitter used at a skeletal neuromuscular junction?

A. Norepinephrine B. Calmodulin C. Acetylcholinesterase D. Acetylcholine

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As the human body grows to trillions of cells, DNA replication occurs about how many times?

A) one billion. B) three trillion. C) 100 trillion. D) 100 quadrillion.

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The homeostatic maintenance and remodeling of bone structure depends on the balanced activity of ________.

Fill in the blank(s) with the appropriate word(s).

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How many DNA molecules are in a somatic cell of the snail in G2 phase?

A) 4 B) 8 C) 16 D) too many to count

Biology & Microbiology