The building blocks of proteins are called _______.
A. nucleotides
B. amino acids
C. fatty acids
D. DNA and RNA
B. amino acids
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The functions of antibodies include
A) activating complement, inactivating pathogens, and clumping pathogens. B) activating macrophages, stimulating mast cells, and increasing the white blood cell count. C) creating a warm and swollen area near the site of infection, which harms the pathogens. D) causing B cells to bind to T cells, forming clumps that are visible to the immune system.
Which of the following occurs immediately after a haploid spore germinates?
a. A gametophyte is created by mitosis. b. A gametophyte is created by meiosis. c. A sporophyte is created by mitosis. d. A sporophyte is created by meiosis.
DNA replication is
a. redundant. b. semiconservative. c. progressive. d. conservative. e. repetitive.
Plasmodesmata ______________________
(a) permit small molecules to pass from one cell to another. (b) are found only in animal cells. (c) are closed by the neurotransmitter dopamine. (d) provide tensile strength.