Prokaryotic DNA replication occurs at a rate of
A. 750-1,000 base pairs per second.
B. 50-100 base pairs per minute.
C. 750-1,000 base pairs per minute.
D. 50-100 base pairs per second.
Answer: A
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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 is only one strand of DNA transcribed into mRNA?
a. Because mRNA is only required in small quantities. b. Because transcribing both DNA strands would produce different amino acid sequences. c. Because the other strand would produce the same amino acid sequence in reverse order. d. Because all genes are located on the same DNA strand, while the other strand acts as protection. e. Because the other strand is transcribed directly into amino acids.
Receptors for polar molecules are found ____ while receptors for nonpolar molecules are located
____.
a. on the cell surface; within the cell b. within the cell; on the cell surface c. on the cell surface; on the nuclear membrane d. on the nuclear membrane; on the cell surface e. on the cell surface; within the membrane interior
Which mineral is essential to the production of thyroid hormone?
a. iron b. calcium c. sodium d. potassium e. iodine