In the Gram-staining procedure, the mordant is
A. crystal violet.
B. alcohol.
C. safranin.
D. iodine.
Answer: D
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According to Stern's experiment described in Figure 6.17, which one of the following enzymes was shown to form an intermediate complex with its substrate(s)?
A. -galactosidase B. pepsin C. DNA polymerase D. lysozyme E. catalase
Which of the following would provide the longest lasting treatment for Leber's congenital amaurosis II?
A) Replacing an enzyme that restores the function of T and B cells B) Substrate reduction therapy and pharmacological chaperone therapy C) Injecting adeno-associated virus carrying ornithine transcarbamylase (OTC) into T and B cells D) Injecting adeno-associated virus carrying a wild type version of the RPE65 gene into affected cells of the retina
Taste buds are
a. really just modified sensilla. b. found only on the tongue. c. collections of papilla that each respond to different stimuli. d. small capsules of cells, each with a pore at the top though which sensory hairs project and interact with environmental molecules. e. EACH able to respond to sweet, sour, salty, bitter, and savory (umami) stimuli.
The enzyme __________ binds to DNA during transcription.
Fill in the blank(s) with the appropriate word(s).