What are prions?
A) mobile segments of DNA
B) tiny circular molecules of RNA that can infect plants
C) viral DNA that attaches itself to the host genome and causes disease
D) misfolded versions of normal protein that can cause disease
E) viruses that invade bacteria
Answer: D
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In addition to ATP, what are the end products of glycolysis?
A) CO2 and H2O B) CO2 and pyruvate C) NADH and pyruvate D) CO2 and NADH E) H2O, FADH2, and citrate
How does an "activated" receptor transfer information into the cell?
A. by altering its ligand-binding site B. through a conformational change C. by decreased phosphorylation D. by increased translation
An important role of bacteria is:
a. primary producers. b. decomposers. c. nitrogen fixation. d. all of the above
Brown algae that live along the rocky shores of the north temperate zones are able to withstand pounding tides and drying because of their holdfasts and the water-retaining material in their cell walls.
Answer the following statement true (T) or false (F)