Muscle cells produce lactic acid when they have an inadequate supply of
A) protein.
B) O2.
C) calcium.
D) actin and myosin.
E) glycogen.
B
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Indicate whether the statement is true or false.
Answer the following statements true (T) or false (F)
1. During hibernation, a bear would be expected to be in the postabsorptive state in terms of nutrient utilization. 2. Triglycerides do not need to be chemically altered or broken down to cross the intestinal epithelium. 3. Animals have the ability to generate glucose from proteins during prolonged postabsorptive states. 4. The term "glucose sparing" refers to the increase in fat utilization seen in most tissues and organs during periods of low glucose availability. 5. Insulin stimulates glycogenolysis and gluconeogenesis by the liver.
Why does DNA synthesis proceed in a 5? to 3? direction?
a. DNA polymerases can only add nucleotides to the 3? end of a polynucleotide strand. b. The 3? end of the polynucleotide molecule contains more phosphates than the 5? end. c. DNA unzips in the 5’ to 3’ direction. d. DNA strands are parallel to each other. e. Chromosomes are aligned in the 5? to 3? direction in the nucleus.
A release of hydrogen ions to a solution would MOST likely ____________.
A) buffer pH B) change salinity C) raise pH D) lower pH E) keep pH steady