Which statement is false concerning X chromosome inactivation?
a. It is an accident of evolution.
b. It is an example of dosage compensation.
c. It is a gene control mechanism.
d. It is responsible for the normal development of female embryos.
e. It does not occur in males.
ANSWER: a
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In the chemical shorthand, 14C, the 14 represents the number of ____
a. excess neutrons b. protons plus neutrons c. electrons d. protons plus electrons e. radioactive particles
While running, ____
a. only diastolic blood pressure increases b. only systolic blood pressure increases c. both diastolic and systolic blood pressures increase d. both diastolic and systolic blood pressures decrease e. there would be no change in either diastolic or systolic blood pressure
Consider the biochemical pathway below, where A, B, and C are substrates and products and E1 and E2 are the enzymes that catalyze the reactions. If Enzyme 1 (E1) is inactive, which of the following compounds will accumulate?
A>e1>B>e2>C C only B only A only B and C A and B
The hazardous materials team has deemed it safe for you to enter and remove patients from an office building that exploded. As you are moving the patients, it is MOST important to:
A) provide only immediate lifesaving care inside the building. B) quickly identify the patients who appear to be the most critical. C) remain alert to the possibility of a secondary explosive device. D) get them out of the building before you begin the triage process.