When ventricular pressure exceeds atrial pressure, the
A. blood is pumped into the atrium.
B. ventricle is in diastole.
C. atria pump blood into the ventricles.
D. AV valves close.
E. ejection occurs.
Answer: D
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What is the correct order of occurrence for the steps of protein synthesis? 1. mRNA is produced in nucleus. 2. Ribosome moves along mRNA. 3. DNA uncoils for transcription. 4. Polypeptide is produced. 5. tRNA brings amino acids to ribosome. 6. mRNA moves to ribosome
A) 3, 1, 6, 2, 5, 4 B) 2, 4, 6, 1, 3, 5 C) 2, 1, 5, 4, 3, 6 D) 3, 5, 1, 6, 2, 4 E) 1, 5, 3, 4, 2, 6
The proteins with which DNA associates to form chromosomes are called
a. histamines. b. histidines. c. histones. d. ribosomes. e. nuclear lamins.
Which of the following functions is associated with vessels that carry blood directly from arterioles to veins without passing through capillaries?
A. thermoregulation B. nutrient supply to tissues C. removal of metabolic waste products from tissues D. oxygen supply to tissues E. pH regulation
The breakdown of glucose to yield carbon dioxide, oxygen, and ATP can be described as ________
A) catabolic and exergonic B) anabolic and exothermic C) anabolic and exergonic D) catabolic and endergonic E) anabolic and endergonic