Which of the following procedures would identify the enzyme that catalyzes the carboxylation of ribulose-1,5-bisphosphate?
A) irradiating a leaf extract with red light
B) introducing radiolabeled carbon dioxide into a plant extract and determining which molecules become radiolabeled
C) purifying a variety of proteins from plant extracts and testing each protein individually to see if it can carboxylate ribulose-1,5-bisphosphate
D) differential sedimentation of a protein extract
Answer: C
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When transporting charged molecules across a membrane, which of the following is/are true?
A) When moving chloride ions in nerve cells, the movement is with both concentration and electrochemical gradients. B) ?G is dependent on electrochemical potential. C) Keq is always equal to zero. D) ?G° is always equal to one. E) Membrane potential is not a factor.
Chromosomes are duplicated during which phase of the cell cycle?
a. M b. D c. G1 d. G2 e. S
Which term refers to the microscope's ability to show two separate objects as discrete and distinct?
A. Resolution B. Contrast C. Refraction D. Magnification
The pulmonary vein carries blood that is rich in oxygen back to the heart. Is there anything unexpected about the name of this vein?
A. Veins usually carry blood that has been depleted of oxygen. B. There is nothing unexpected about the name of this vein. C. Pulmonary refers to veins that carry blood to the lungs. D. Veins usually carry blood away from the heart.