Protons are pumped out of the cell, which creates a proton gradient and a charge gradient. This dual energy source is Used by symport to concentrate nutrient inside the cell.
a. true
b. false
Ans: a. true
Biology & Microbiology
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Water stabilizes body temperature and dissolves many substances because
a. it evaporates easily. b. its molecules are covalent. c. its molecules are ionic. d. it contains hydrogen bonds. e. it is free of minerals
Biology & Microbiology
Four of the five answers listed below are nitrogenous bases found in DNA. Select the EXCEPTION.
A. G B. A C. U D. T E. C
Biology & Microbiology
Movement of the chromosomes during anaphase would be most affected by a drug that prevents _____
A) nuclear envelope breakdown B) elongation of microtubules C) shortening of microtubules D) formation of a cleavage furrow
Biology & Microbiology
Which DNA binding motif does lambda repressor have?
a. zinc finger b. helix-loop-helix c. leucine zipper d. helix-turn-helix e. None of the above.
Biology & Microbiology