Which type of macromolecules in Escherichia coli comprise the largest fraction of the microbe's total biomass?
a. carbohydrates
b. DNA and RNA
c. lipids
d. proteins
Answer: D
Biology & Microbiology
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The oldest fossils
a. demonstrate the widest distribution. b. represent the most highly evolved organisms. c. are found buried deeper in the ground than more modern forms. d. are found in Africa. e. are primitive marine vertebrates.
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EcoRI is an example of a ________.
Fill in the blank(s) with the appropriate word(s).
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Some drugs used in chemotherapy stop cell division by affecting the cytoskeleton. The drugs would cause functional disabilities in which of the following?
A) both flagella and cilia B) flagella C) cilia D) neither flagella nor cilia
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A cell membrane is ______________?
a. permeable b. semipermeable c. nonpermeable d. None of the above
Biology & Microbiology