Infection with Helicobacter pylori can cause ________
A) tooth decay B) peptic ulcers C) constipation D) gallstones
Answer: B
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Heavy metals are effective antimicrobial agents but are not widely used because of their high toxicity to humans.
Answer the following statement true (T) or false (F)
What must occur before a glucose molecule can be broken down to release energy?
a. One ATP molecule must phosphorylate the six carbon sugar. b. Two ATP molecules must phosphorylate the six carbon sugar. c. Three ATP molecules must phosphorylate the six carbon sugar. d. One ATP molecule must be taken away from glucose. e. Two ATP molecules must be taken away from glucose.
How can freeze-fracture be used to determine the orientation of a protein in a membrane?
A. Freeze-fracture cuts the membrane in protein-sized components for viewing under an electron microscope. B. Freeze-fracture allows a cell to be cleaved in such a way as to preserve the embedded proteins. C. Freeze-fracture allows a cell to be cleaved in between the lipid bilayer, splitting the plasma membrane into two layers.
Beach erosion is often caused by structures built to prevent erosion.
a. true b. false