Which of the listed contraceptive methods is the most effective?
a. withdrawal
b. diaphragm
c. condoms
d. douching
e. rhythm method
ANSWER: c
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Answer the following statements true (T) or false (F)
1. ATP synthase is a good example of a molecular machine that is composed of various protein subunits and that has moving parts. 2. The proton motive force is key to chemiosis because the H+ electrochemical gradient is lower in the intermembrane space than inside the matrix. 3. If oxygen is present, pyruvate will be converted to acetyl CoA in the mitochondrial matrix. 4. When a molecule of NAD+ (nicontinamide adenine dinucleotide) gains a hydrogen atom, the molecule becomes reduced. 5. Proteins and fats may be used as energy sources to drive aerobic respiration.
Most of the energy that is released by the full breakdown of glucose to CO2 and water ends up in _____
a. NADH b. ATP c. heat d. electrons
Which soil horizon, A, B, or C, contains larger soil particles, not much organic matter, and a greater accumulation of minerals?
1.A
2.B
3.C
Lysosomal proteins are marked by adding a phosphate to a _______ group.
a. glucose b. serine c. GDP d. mannose