Functionally important gene sequences such as those encoding ribosomal RNA are

A. highly repetitive sequences.
B. minimally repetitive sequences.
C. moderately repetitive sequences.
D. transposable sequences.
E. highly mutated sequences.


C. moderately repetitive sequences.

Biology & Microbiology

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The amino acid that is placed first during translation in bacteria, mitochondria, and chloroplasts is

A. glycine. B. methionine. C. N-formyl-methionine. D. serine.

Biology & Microbiology

At times when Earth’s climate was cooler than it is today, the polar ice caps ____, rainfall ____, and sea levels ____

a. retreated; increased; rose b. retreated; decreased; fell c. grew larger; increased; fell d. grew larger; increased; rose e. grew larger; decreased; fell

Biology & Microbiology

This disease most commonly occurs because

an enzyme that crosslinks fibrin strands into a stable mesh is defective. This disease is

a. sickle-cell anemia. b. hemophilia. c. atherosclerosis. d. hypertension. e. emphysema

Biology & Microbiology

The ____ develops into a corpus luteum

a. zona pellucida b. uterine wall c. primary oocyte d. secondary oocyte e. follicle

Biology & Microbiology