In the mammalian heart, the systemic and pulmonary circuits ____
a. carry only oxygenated and deoxygenated blood, respectively
b. carry only deoxygenated and oxygenated blood, respectively
c. mix during times of stress
d. intermix freely
e. are completely separate
ANSWER: e
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A. one full set of chromosomes, each with 2 molecules of DNA. B. two full sets of chromosomes, each with 2 molecules of DNA. C. one full set of chromosomes, each with 1 molecule of DNA. D. two full sets of chromosomes, each with 1 molecule of DNA.
Induced fit can be best described as the result of:
A. mutations that increase ligand binding. B. a decrease in Ka. C. an increase in Kd. D. the conformational change of the ligand due to binding to protein. E. the conformational change in protein due to binding to ligand.
People having heart attacks often perceive referred pain coming from the ________
a. small of back b. left shoulder and arm c. right shoulder and arm d. stomach
What is the purpose of flowers?
A. to attract pollinators B. to support gamete production C. to capture wind-blown pollen D. to protect reproductive structures E. All answers are correct.