Which molecule powers the chemical work within cells?
A) NAD+
B) NADPH
C) CO2
D) ATP
D
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Which of the following is not found among the zygomycetes?
A. Nonseptate hyphae B. Fusion of gametes C. Flagellated cells D. Saprophytic nutrition
How do the muscles in your arm extend your arm outward?
A. The muscles in your arm push on the bones, causing your arm to extend. B. The muscles in your arm relax, and the tendons pull the arm straight. C. The top half of your bicep wraps around underneath the elbow like a rope over a pulley. When it contracts, the arm is pulled out straight. D. Some muscles in your arm relax, and others contract, pulling the arm straight.
The monomer subunit of immunoglobulin molecules has all of the following except
A. a variable and constant region on each polypeptide chain. B. disulfide bonds between polypeptide chains. C. four antigen binding sites. D. two identical heavy polypeptide chains. E. two identical light polypeptide chains.
Strictly speaking, mitosis is a division of the
a. nucleus. b. cytoplasm. c. chromosomes. d. nucleus and chromosomes. e. nucleus, cytoplasm, and chromosomes.