What is the smallest unit that can evolve?

A. The population
B. The ecosystem
C. The cell
D. The individual


Answer: A

Biology & Microbiology

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Which one of the following is a primary component of both living organisms and the Earth's crust?

A. silicon B. hydrogen C. oxygen D. carbon E. nitrogen

Biology & Microbiology

The DNA-binding proteins of almost all regulatory proteins use one of a small set of shapes that enable them to fit into the DNA major groove. These shapes are called  

A.  structural motifs. B.  DNA prints. C.  fingerprints. D.  repressors. E.  transcriptional domains.

Biology & Microbiology

Which of the regions of the ribosome accepts charged tRNA molecules during the elongation phase of

translation?

a. the A site (aminoacyl site) b. first the A site (aminoacyl site) and then the E site (exit site) c. the P site (peptidyl site) d. first the A site (aminoacyl site) and then the P site (peptidyl site) e. the E site (exit site)

Biology & Microbiology

Slow deterioration of muscle function occurring over many years occurs in

A) West Nile encephalitis. B) postpolio syndrome. C) African sleeping sickness. D) minor polio. E) leprosy.

Biology & Microbiology