In which soils do most plants do best?

a. sandy soils
b. soils made mostly of humus
c. clay soils
d. loams


Ans: d. loams

Biology & Microbiology

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Plastoquinone (PQ), an electron carrier of small molecular weight, is found in the electron transport chain associated with photosystem II. If PQ is not directly anchored to other membrane or cytoplasmic structures, it is probably _____

A) mobile in the thylakoid membrane B) lipid soluble C) a molecule that serves as a shuttle between the electron transport chain and ATP synthase D) both lipid soluble and a molecule that serves as a shuttle between the electron transport chain and ATP synthase

Biology & Microbiology

The cofactors required for enzyme activity often are

a. allosteric inhibitors. b. allosteric activators. c. charged amino acids. d. large, complex organic molecules. e. competitive inhibitors.

Biology & Microbiology

During the process of diffusion, solutes move ________ their concentration gradient.

a. down b. up c. across d. the solutes do not move during diffusion

Biology & Microbiology

Severe vomiting or excess aldosterone production could result in

A. respiratory acidosis. B. metabolic acidosis. C. respiratory alkalosis. D. metabolic alkalosis.

Biology & Microbiology