Which step in this process requires use of restriction enzymes?
A) step A
B) step B
C) step C
D) step D
Answer: B
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Bacteria that produce nitrite ( NO2- ) during anaerobic respiration would use ___ as their final electron acceptor.
A. NO3- B. O2 C. N2 D. N2O
Which type of lipid is most important to the structure of biological membranes?
a. fat b. wax c. phospholipid d. neutral fat e. triglyceride
The human body's arterial blood pH is tightly maintained around 7.4 by buffering agents that bind hydrogen ions to stop any change in pH. If an acid-base imbalance overcomes the buffer system, the body changes the ventilation rate, or the rate at which gas enters or leaves the lungs. Changing the ventilation rate changes the concentration of CO2 in the blood, which alters the pH of the blood. In this case, pH 7.4 is the:
A. set point. B. sensor. C. integrator. D. effector. E. homeostatic challenge.
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