Amino acids are molecules which contain both an amino group and a carboxyl group. Which atomic species must be present in all amino acids?

A) C and H
B) C, H and N
C) C, H and O
D) C, H, N and O


D

Environmental & Atmospheric Sciences

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What will be an ideal response?

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Consider a certain carboxylic acid at physiological pH of about 7.4. Assume the following general reaction. HA(aq) + H2O(l) ? H3O+(aq) + A-(aq) What will happen to the ratio of the deprotonated to protonated form, respectively, if the pH of the solution drops to 6.2?

A) It will decrease. B) It will increase. C) It will remain constant. D) It will decrease then increase since it is a buffer.

Environmental & Atmospheric Sciences

What factor does NOT contribute to the initiation of an ice age?

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Environmental & Atmospheric Sciences