All of the following are used by bacteria to attach to host cells EXCEPT

A) M protein.
B) ligands.
C) fimbriae.
D) capsules.
E) A-B toxins.


E

Biology & Microbiology

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The lacZ and lacY genes are transcribed when:

A. lactose is present, regardless of the level of glucose in the cell. B. lactose is absent and glucose levels are high. C. lactose is present and glucose levels are low. D. glucose levels are high and lactose levels are low. E. glucose levels are low, regardless of the level of lactose in the cell.

Biology & Microbiology

Nuclear signaling takes longer than a cytoplasmic signal to work.

a. true b. false

Biology & Microbiology

Which of the following individuals has a recessive phenotype?

A. aAbB B. Aa C. AA D. AaBb E. aabb

Biology & Microbiology

Which are the components of an ATP molecule?

A. ribose, 3 phosphates, 1 adenine B. glucose, 3 phosphates, 1 guanine C. deoxyribose, 3 phosphates, 1 guanine D. deoxyribose, ribose, 1 cytosine E. ribose, 2 phosphates, 1 thymine

Biology & Microbiology