How are prokaryotes different from eukaryotes?

A) Prokaryotes have no DNA.
B) Prokaryotes have no nucleus separating the DNA from the rest of the cell.
C) Prokaryotes are unicellular, while eukaryotes are multicellular.
D) Prokaryotes cause disease, but eukaryotes don't.


B

Biology & Microbiology

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Comparing transmission electron microscopy with scanning electron microscopy, the following statement is true.

A. Transmission EM can provide good images of bacteria but not viruses. B. Transmission EM is used for internal detail of cells and subcellular structures. C. Transmission EM requires dyes. D. Transmission EM gives detail of the external architecture of cells.

Biology & Microbiology

What change would allow a chemical reaction to proceed more quickly, while only minimally increasing the energy input required?

a. denaturing the substrate b. adding a catalyst c. heating the reactants d. diluting the products

Biology & Microbiology

The molecule below is a(n)



A. glycerol.
B. polypeptide.
C. saturated fatty acid.
D. unsaturated fatty acid.

Biology & Microbiology

Telomerase is the name of the enzyme that replaces lost telomeres

A. true B. false

Biology & Microbiology