In addition to electrons, which of the following is also involved in electron transfer?
A. hydrogen
B. carbon dioxide
C. carbon
D. ADP
E. glucose
Answer: A
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One symptom of kidney failure can be the appearance of blood in the urine. This would indicate that which part of the kidney was damaged?
A. proximal convoluted tubule B. distal convoluted tubule C. glomerulus D. nephron E. collecting duct
Members of the same species must
a. look alike. b. be reproductively isolated from one another. c. share the same gene pool. d. resist interbreeding. e. produce the same variations.
Peptide bonds form between ____
a. two amino groups b. two carboxyl groups c. a carboxyl group and an R group d. an amino group and a carboxyl group e. an amino group and an R group
The cell membrane that surrounds all cells is said to be semipermeable. What does this mean?
A) Only particles of a substance that are small enough can pass through the cell membrane. B) The cell membrane consists of two layers of lipids with proteins that are either embedded in these layers or on the surface. C) The cell membrane always uses energy to transport particles of substances into and out of the cell. D) Only certain substances can pass through the cell membrane.