Answer the question using the accompanying graph. Which portion of the graph shows the activation energy in the
presence of enzyme?
a. A
b. B
c. C
d. W + X
e. Y + Z
ANSWER: b
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The human elbow is an example of a ____ joint
a. hinge b. fulcrum c. ball-and-socket d. lever e. ligament
Which of the following events occurs in blood in body tissue?
a. free H+ releases from hemoglobin. b. erythrocyte HCO3 ? enters the plasma. c. in the plasma, HCO3 ? and H+ convert into CO2 and H2O. d. in erythrocytes, carbonic anhydrase converts HCO3 ? and H+ into CO2 and H2O. e. CO2 binds to hemoglobin.
A new antibiotic is developed that interferes with the way tRNA fits into bacterial ribosomes. How would this kill the bacteria?
A) The bacteria would be unable to produce necessary enzymes to carry out basic metabolism. B) The tRNA would be unable to carry out transcription. C) Ribosomes would not be able to produce mRNA, and cell functions would halt. D) tRNA would not unwind the DNA to allow DNA polymerase to copy it; thus, cell division would stop.
The movement of organic compounds throughout plants is described as ____.
A. cohesion-tension B. source-to-sink C. facilitated transport D. active transport E. transpiration pull