The flu is an example of a virus that spreads through
A. horizontal transmission
B. vertical transmission
Answer: A. horizontal transmission
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Based on the function of mitochondria, what substance is able to pass through the outer membrane of the mitochondria easily?
A. Oxygen B. Sugars C. Amino acids D. Potassium ions
Each year, the direct and indirect costs of psychiatric and neurological disorders in the United States amount to about:
A) $40 billion B) $400 million C) $400 billion D) $40 million
DNA replication occurs during
A. prophase of mitosis. B. metaphase of mitosis. C. gap 1 of interphase. D. S phase of interphase.
In the plasma membrane, the phospholipid heads
A) are hydrophilic and face outward toward the aqueous solution on both sides of the membrane. B) are hydrophilic and face inward, shielded from water. C) are hydrophobic and face outward toward the aqueous solution on both sides of the membrane. D) are hydrophobic and face inward, shielded from water.