Pyruvate is an important metabolic intermediate that can be converted into several other compounds, depending on which enzyme is catalyzing the reaction. Which of the following cannot be produced from pyruvate in a single enzyme-catalyzed reaction?
(a) lactate
(b) oxaloacetate
(c) citrate
(d) alanine
(c)
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Gram-positive bacteria produce endotoxins
Indicate whether the statement is true or false.
Tubulin subunits are added to growing cilia or flagella by ________.
Fill in the blank(s) with the appropriate word(s).
The letter “C” in the figure above represents
a. root apical meristem. b. dermal tissue. c. vascular tissue. d. ground tissues. e. ground, dermal, and vascular tissues.
If a bone fragment resulting from a broken nose pushed against the olfactory (smell) nerve, triggering an action potential, the person would
A) register the sensation as a smell. B) register the sensation as a visual stimulus. C) register the sensation as a sound. D) lose her sense of smell. E) not register the sensation at all.