The nitrogen in your body came from the 

A. proteins in the food you eat.
B. carbohydrates in the food you eat.
C. air you breathe.
D. water you drink.


A. proteins in the food you eat.

Biology & Microbiology

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Using the accompanying diagram, which of the following corresponds to the +1 nucleotide?

A) A B) B C) C D) F E) G

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In order to fit the X-ray crystallographic data, the two DNA strands must be ____ to each other

a. complementary b. uncomplementary c. parallel d. antiparallel e. semiconservative

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What enables the copied chromosomes to separate during binary fission?

a. The nuclear membrane dissolves. b. The mitotic spindle drives the separation. c. The septum splits the replicated chromosomes. d. The chromosomes are attached to different parts of cell membrane, which elongates and thus separates the chromosomes.

Biology & Microbiology

What is the name given to the starch-digesting enzyme secreted by salivary glands?

A) bile B) lipase C) pepsin D) amylase

Biology & Microbiology