Which of the following statements about water is false?
a. Hydrogen bonds can form between water and other polar substances
b. The oxygen atom in a water molecule carries a slight negative charge.
c. The hydrogen atoms in a water molecule carry a slight negative charge.
d. The three-dimensional structure of ice owes its form to hydrogen bonding between water molecules.
c
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Which of the following sequences in double-stranded DNA is most likely to be recognized as a cutting site for a restriction enzyme (endonuclease)?
A) AAGG TTCC B) AGTC TCAG C) GGCC CCGG D) ACCA TGGT E) AAAA TTTT
The myometrium is
a. the lining of the uterus. b. the lining of the vagina. c. the tissue that covers an ovary. d. smooth muscle in the wall of the uterus. e. the lining of the oviducts.
The factors that are the same in all experimental groups are_______.
A. Independent variable B. Dependent variable C. Controlled variable D. B and C
A decline in pH causes the kidneys to increase reabsorption of which substance?
A. Bicarbonate B. Hydrogen ions C. Carbon dioxide D. Carbonic acid E. Phosphates