Which of the following is false?
a. The outer coats of all viruses are alike.
b. The virus contains either DNA or RNA at its
core, but not both.
c. Viruses infect organisms in all three domains of
life.
d. Most viruses have a protein coat or covering.
e. Some viruses benefit us indirectly.
Answer: a
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The end of the nucleic acid chain that grows by adding more nucleotides is always the
A. 5 prime end. B. C terminal. C. N terminal. D. 3 prime end.
Osmometer cells in the brain sense an increase in the salt concentration of plasma. This information is sent to the hypothalamus, which notifies the pituitary gland to release the hormone, ADH. ADH causes the kidney to save water, which lowers the salt concentration of the plasma. What characteristic of life does this overall pathway represent?
A. Sensitivity B. Energy utilization C. Cellular organization D. Homeostasis E. Evolutionary adaptation
In the absence of O2, the partial metabolism of glucose in human muscles produces _____
a. acetaldehyde b. carbon dioxide c. energy d. lactic acid e. oxygen
An informed statement that can be tested in a manner suited to the processes of science is known as a