What must be true when electrons are passed between protein complexes?
a. Electrons are directly passed from one complex to the next by physical contact.
b. The oxidized electron carrier passes on the electron and becomes reduced.
c. A proton is translocated to the inner mitochondrial space.
d. The matrix decreases in pH.
e. The reduced electron carrier passes on the electron and becomes oxidized.
E
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______ cells are made during mitosis, but _______ cells are made during meiosis.
a. Somatic; diploid b. Haploid; gamete c. Somatic; haploid d. Haploid; diploid
Who used a compound microscope to see chambers within cork and named them cells?
a. Anton van Leeuwenhoek b. Robert Hooke c. Matthias Schleiden
Where are sperm stored after they are produced?
a. in the vas deferens b. in the epididymis c. in the seminiferous tubules d. in the penis
How can urine contain a higher concentration of wastes (be hypertonic) than the blood?
Select one: a. Urine cannot since the process is passive diffusion. b. Reabsorption of water in the loop of the nephron and collecting ducts leaves behind a more concentrated urine. c. All stages in the kidney involve active transport. d. Urine can be hypertonic for small molecules if it is hypotonic for an equal number of big molecules. e. The whole nephron is impermeable to water.