The cell walls of plant cells that have stopped
growing and actively dividing are
characterized by the presence of
a. pectin.
b. cellulose.
c. glue-like polysaccharides.
d. lignin.
e. a gluey matrix containing rope-like strands
D
Biology & Microbiology
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The symplast transports all of the following except
A) sugars. B) mRNA. C) DNA. D) proteins. E) viruses.
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A(n) ________ is a virus that infects bacterial cells.
A. virion B. prion C. bacteriophage D. nucleocapsid E. envelope
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In the DNA double helix, the two strands are joined by _____.
A) phosphate bonds B) hydrogen bonds C) covalent bonds D) deoxyribose
Biology & Microbiology