Plant cells release hydrogen ions and oxygen from H2O molecules in ____
a. photosystem I
b. photosystem II
c. cyclic photophosphorylation
d. the light independent reaction
e. carbon fixation
ANSWER: b
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A woman who is heterozygous for an allele that results in X-linked pattern baldness marries a man who is nonbald. Which of the following would be true of their offspring?
A. All would be bald B. All of the females would be nonbald, all males would be bald C. All of the females would be nonbald, ½ of the males would be bald D. ½ of females would be bald, and ½ of the males would be bald E. All would be nonbald
Meningitis
a. results when a virus or bacterium crosses the blood-brain barrier. b. is not usually fatal. c. results when cerebrospinal fluid seeps out of the meninges. d. occurs when white matter mixes with gray matter. e. includes all of these characteristics
Many bacterial infections are treated with drugs, such as penicillin and sulpha drugs, that ____ the bacterium’s
enzyme activity. a. inhibit b. promote c. decrease d. stabilize e. accentuate
Which of the following organelles are enclosed by a double membrane?
a. All organelles are enclosed by a double membrane. b. vacuoles and the endoplasmic reticulum c. the nucleus and the Golgi apparatus d. mitochondria and chloroplasts e. ribosomes and lysosomes