Cyanide poisons cell by limiting the production of ATP through cellular respiration. Cyanide does this by blocking the enzyme that attaches electrons and hydrogen atoms to oxygen to form water. Which stage of cellular respiration would this most directly affect?

A Acetyl CoA formation
B Electron transport chain
C Glycolysis
D Krebs cycle

The small molecule cyclic amp (camp) takes about 0.2 second to diffuse 10 μm, on average, in a cell. suppose that camp is produced near the plasma membrane on one end of the cell; how long will it take for this camp to diffuse through the cytosol and reach the opposite end of a very large cell, on average? assume that the cell is 200 μm in diameter.

Which statement is not an accurate description of meiosis? a) meiosis produces offspring that are genetically diverse. b) meiosis produces offspring that are identical to the parent. c) in sexual reproduction half of the genetic material comes from the father (sperm) and half of the genetic material comes from the mother (egg). d) meiosis decreases the number of chromosomes by half so that when a sperm fertilizes an egg, the resulting zygote has the correct number of chromosomes.

Which of the following organisms are capable of self-fertilization? a.plants b.tigers c.humans