DNA strands are parallel, running in the same orientation.
a. true
b. false
Ans: b. false
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An explanation for a biological process that is substantiated by a large body of evidence is called a ______.
A. hypothesis B. theory C. systems biology D. reductionism E. prediction
In the female, the ________ secretes both estrogen and progesterone, and if fertilization does not occur, this structure degenerates
Fill in the blank(s) with correct word
Although glucose molecules constantly diffuse into a red blood cell along their concentration gradient, equilibrium is never reached and a steep concentration gradient is continually maintained. What causes this?
a. The active transport of glucose b. The very fast turnover rate of glucose metabolism c. The ability of the cell to engulf glucose by pinocytosis d. The continuous excretion of glucose from other parts of the cell e. The rapid and continuous addition of phosphates onto the glucose molecules
Why is perspiration an effective defense against microorganisms?
A) basic pH and low salt content B) basic pH, low salt content, and presence of lysozyme C) low salt content D) presence of lysozyme E) basic pH