The free energy for the oxidation of glucose to CO2 and water is -686 kcal/mol and the free energy for the reduction of NAD+ to NADH is +53 kcal/mol
Why are only two molecules of NADH formed during glycolysis when it appears that as many as a dozen could be formed? A) Most of the free energy available from the oxidation of glucose is used in the production of ATP in glycolysis.
B) Glycolysis is a very inefficient reaction, with much of the energy of glucose released as heat.
C) Most of the free energy available from the oxidation of glucose remains in pyruvate, one of the products of glycolysis.
D) There is no CO2 or water produced as products of glycolysis.
C
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In what phase of the cell cycle does a typical cell spend most of its life?
a. interphase b. prophase c. metaphase d. anaphase e. telophase
The microorganisms that do not have a nucleus in their cells are called
A. pathogens. B. eukaryotes. C. prokaryotes. D. fermenters. E. decomposers.
The lungs consist of many small air sacs that greatly increase surface area and thereby facilitate diffusion across a layer of cells. The structures in the digestive system most similar in function to these air sacs are the __________.
a. esophagus b. gastric glands c. chief cells d. sphincters e. villi and microvilli
To which of the following processes is transpiration most analogous?
a. water moving through a water hose b. magnets attracting metal
c. sucking soda through a straw d. a waterfall e. a sponge absorbing a spill