A series of enzyme-mediated reactions by which cells build, remodel, or break down organic molecules is known as ____.
a. energy carriers
b. metabolic pathways
c. the induced-fit model
d. intermediary compounds
e. activation
ANSWER: b
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The two interesting types of people who led researchers to discovery of the SRY gene were
A) physicists and chemists. B) XX males and XY females. C) XY males and XX females. D) XXX females and XYY males.
Which of the following statements about mollusks is true?
a. All have visceral ganglia, which control the opening and closing of the shell. b. Cephalopod mollusks are capable of learning and are considered the most intelligent of the invertebrates. c. They have cerebral ganglia, which control the movement of the foot. d. They have three pairs of ganglia that are unconnected and function independently. e. They have two pairs of ganglia that are connected in a ladder-like fashion.
What is the sugar found in an RNA nucleotide?
A) deoxyribose B) thymine C) ribose D) uracil E) glucose
The type specimen for Homo erectus was found at which site?
A. Bahrel el Ghazi B. Fayum C. Makapansgat D. Trinil E. Liang Bua