According to the endosymbiont theory:   a)  modern plant cells are able to carry out photosynthesis because their ancestors engulfed cyanobacteria.   b)  chloroplasts and mitochondria evolved from prokaryotic cells.   c)  ancestral eukaryotic cells acquired the ability to carry out aerobic respiration as a result of engulfing aerobic bacteria.   d)  a and c   e)  a, b and c

Why was the development of enzymes fundamental to the evolution of life? a) without enzymes, the activation energy for essential reactions was too low b) enzymes allowed for high rate of catalysis at relatively low temperatures  c) enzymes reduced the cellular demand for ATP d) enzymes allowed for reactions to occur spontaneously

. A multicellular eukaryote cell typically has enough available ATP to meet its needs for about 90 seconds. What would cause an active cell to exhaust its ATP supply so quickly? A) regular rest is a cellular requirement. B) Photosynthesis used up all ATP. C) ATP is transported into other cells. D) Too much glucose takes over the cell, E) the cell runs out of or uses up the available O2

18-Consider the reaction: A + B → C + D+ Energy a) the reaction is endergonic b) an enzyme could further speed up the reaction c) ATP is required for the reaction to proceed d) all of these statements are correct 20-The result of convergent evolution would be that: a) bats, birds and beetles have wings that have evolved at different times in the history of life b) bats, birds and beetles do not share a common ancestor with respect to wings c) the wings evolved three times independently, on three branches of the tree of life d) all of the above are correct 21-This reaction: 6CO2 + 6 H2O converted to C6H12O6 + 6O2 a) requires chlorophyll oxidation b) is an oxidation of carbon dioxide c) converts carbon dioxide into oxygen d) takes place in the mitochondrial matrix 22-Which of these statements is false regarding metabolism in general? a) oxidation can be defined as a loss of electrons b) during photosynthesis, hydrogen atoms are transferred from sugar to O2 c) potential…