The area where the optic nerve leaves the retina and where photoreceptors are absent is called the ________
A) optic area
B) blind spot
C) fovea
D) cornea
B
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Because the TCA cycle is associated with degradation and synthesis, the pathway is said to be
A) anabolic. B) amphibolic. C) catabolic. D) bipolar. E) amphipathic.
In the identification of mycobacterial isolates, the catalase test involves the:
a. breakdown of phenolphthalein disulfate into phenolphthalein and other salts. b. measurement of the height of a column of bubbles of oxygen. c. production of a lipase that is able to hy-drolyze the catalase. d. development of a pink-to-red color, indi-cating a positive result.
Where is the dirt? A micro student looking through his microscope observed a small, spherical object. The student felt something must be wrong since he was looking at a slide of Spirogyra. His lab partner suggested maybe it was dirt? He rotated his ocular lens to see if the speck would rotate. It did not rotate. What should he check next?
A) Clean the objective lens B) Clean the ocular lens C) Adjust the diaphragm D) Adjust the condenser
Proteins bind selectively to small-molecule targets called ligands. The selection of one ligand out of a mixture of possible ligands depends on the number of weak, noncovalent interactions in the protein's ligand-binding site
Where is the binding site typically located in the protein structure? (a) on the surface of the protein (b) inside a cavity on the protein surface (c) buried in the interior of the protein (d) forms on the surface of the protein in the presence of ligand