Which of the following are NOT structures by which viruses adhere to their host cells?

a. Capsule
b. Spikes
c. Fimbriae
d. Slime layer


a. Capsule
c. Fimbriae
d. Slime layer

Biology & Microbiology

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The enzyme that catalyzes the addition of new nucleotides to a growing DNA strand is

A. DNA polymerase. B. helicase. C. topoisomerase II. D. DNA ligase. E. DNA replicase.

Biology & Microbiology

In a neuron at rest, the membrane is most permeable to

A. potassium. B. sodium. C. chloride. D. calcium. E. magnesium.

Biology & Microbiology

Outline three properties of genes for which the Watson–Crick model offers an explanation. What will be an ideal response?

Biology & Microbiology

Under ideal conditions, the number of DNA molecules produced during PCR increases exponentially

Indicate whether the statement is true or false

Biology & Microbiology