In C4 photosynthesis, where does the carbon in newly synthesized glucose come from?
A) Atmospheric CO2
B) Water
C) Chlorophyll
D) ATP and NADPH
E) Enzymes
A
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A spontaneous reaction
A) has to occur immediately. B) will never occur. C) has an overall positive free energy change. D) could occur but might take a very long time. E) is associated exclusively with homeothermic organisms.
Answer the question using the accompanying figure. The structure labeled “B” forms at the ____
a. junctions of A bands and I bands b. H zone c. junctions of A bands and H zones d. M line e. junctions of I bands and M lines
You collect and measure samples of ice and surrounding ice water from a stream in the winter. You find that you collected the same number of water molecules in each form. The volume of the ice samples are larger than the ice water samples. This is a result of
A. the ionic bonds between the water molecules being unstable and constantly forming and breaking that increases the volume and decreases the density of the ice. B. the covalent bonds between the water molecules being unstable and constantly forming and breaking that increases the volume and decreases the density of the ice. C. the covalent bonds between the water molecules being in a fixed position that increases the volume and decreases the density of the ice. D. the hydrogen bonds between the water molecules being unstable and constantly forming and breaking that increases the volume and decreases the density of the ice. E. the hydrogen bonds between the water molecules being in a fixed position that increases the volume and decreases the density of the ice.
What is a phagolysosome?
a. A protein that covers the surface of an invading microbe, making it easier for the phagocyte to ingest. b. A vesicle containing only digestive enzymes and other antimicrobial compounds. c. The structure that results from the fusion of a phagosome and a lysosome. d. A vesicle containing only an engulfed invading microorganism.