The enzymes that synthesize mRNA from the start codon are called
A) lactate dehydrogenases.
B) ribonucleases.
C) DNA polymerases.
D) ATP synthases.
E) RNA polymerases.
E) RNA polymerases.
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The currently fashionable "low rise" jeans may expose (the)
A) inguinal canal. B) inguinal ligament. C) posterior superior iliac spine. D) anterior superior iliac spine. E) All of the answers are correct.
Answer the following questions true (T) or false (F)
1. The internal anal sphincter is controlled involuntarily while the external anal sphincter is controlled voluntarily. 2. Cholecystokinin (CCK) and secretin are produced by the duodenum to target the acinar cells of the pancreas. 3. Reactions in which smaller molecules are combined to make a larger molecule are known as anabolic reactions.
In the proximal tubule, hydrogen ions are transported into the filtrate by
A) Na+/H+countertransporters only. B) H+ primary active transporters only. C) H+/Cl- cotransporters only. D) both Na+/H+ countertransporters and H+ primary active transporters. E) both Na+/H+ countertransporters and H+/Cl- cotransporters.
Nerves and blood vessels that service the muscle fibers are located in the connective tissues of the
A) endomysium. B) perimysium. C) sarcolemma. D) sarcomere. E) myofibrils.