What will be an ideal response?
What percentage of air is carbon dioxide?
A) 6%
B) 79%
C) 12%
D) < 1%
E) 21%
Ans: D) < 1%
Biology & Microbiology
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A human blastomere is _____
A) an embryonic cell that is smaller than the ovum B) an embryonic structure that includes a fluid-filled cavity C) that part of the acrosome that opens the egg's membrane D) a component of the zona pellucida E) a cell that contains a (degenerating) second polar body
Biology & Microbiology
Consider an erythrocyte with an internal glucose concentration of 0.1 mM and an external glucose concentration of 5 mM. Each of the following is true about GLUT1 transport of glucose across the plasma membrane into the cell except
A) Keq is always equal to 1. B) ?G depends on the concentration gradient. C) inward movement is exergonic. D) ?G° is always equal to 0. E) the rate of GLUT1 transport is faster than that of simple diffusion.
Biology & Microbiology
What is the difference between the leading strand and the lagging strand in DNA replication?
A) The leading strand is synthesized in the ? direction in a discontinuous fashion, while the lagging strand is synthesized in the ? direction in a continuous fashion. B) The leading strand is synthesized continuously in the ? direction, while the lagging strand is synthesized discontinuously in the ? direction. C) The leading strand requires an RNA primer, whereas the lagging strand does not. D) There are different DNA polymerases involved in elongation of the leading strand and the lagging strand.
Biology & Microbiology
What causes a change in the number of chromosomes?
Biology & Microbiology