Amino acids tend to diffuse from a blood capillary to the adjacent cell because

a. this is the only direction they can move
b. the brain directs the movement into cells
c. the cell needs the amino acids to make protein
d. the concentration of amino acids is lower in the cell.


Answer: d. the concentration of amino acids is lower in the cell.

Biology & Microbiology

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A mature mRNA contains which of the following?

A. Exons B. 5' Cap C. 3' Poly-A-tail D. introns E. All of the above F. A, B, C, D G. A, B, C, H. B, C, D

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Three investigators–Nüsslein-Volhard, Wieschaus, and Lewis–won the Nobel Prize for physiology and medicine in 1995 for work they did in 1970 with Drosophila. Briefly describe their findings

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In oxygen homeostasis, the kidney that releases EPO, prompting increased red blood cell production is the:

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