The lowest blood pressure that occurs when the ventricles are relaxing is known as ________
A) diastolic pressure
B) systolic pressure
C) aneurysm
D) arterial pressure
A
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This enzyme is responsible for breaking the backbone on the DNA double helix
A. supercoilase B. topoisomerase II C. nucleoidase D. transcriptase E. polymerase
Barr bodies
A. are formed in females. B. are formed only in males. C. cause an increased production of X-linked gene products. D. inactivate Xic on autosomes. E. are formed only in males and inactivate Xic on autosomes.
Which of the following explains why a saturated fat and an unsaturated fat are different?
a. A saturated fat contains double bonds, while an unsaturated fat does not. b. An unsaturated fat contains double bonds, while a saturated fat does not. c. A saturated fat is liquid at room temperature, while an unsaturated fat is not. d. A saturated fat can be called an oil, while an unsaturated fat cannot.
The fact that the earth does not go up in flames in spite of the richness of oxygen in our environment is related to
which of the following concepts?
a. the activation energy needed to break bonds b. the fact that reactants always have less energy than products c. the first law of thermodynamics d. the second law of thermodynamics e. the abundance of water in our atmosphere which inhibits combustion