Microbial infection damages hosts by

A) toxins, exoenzymes, induction of immune response.
B) attachment, invasion, endotoxin production.
C) erythrocytes, phagocytes, disintegration.
D) toxigenicity, autoimmunity, overactivity of immune system.


Ans: A) toxins, exoenzymes, induction of immune response.

Biology & Microbiology

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Most viral respiratory diseases are highly contagious but not life threatening

Indicate whether the statement is true or false.

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A deletion in an operon removes the promoter. How will that affect the transcript that is produced from the operon?

A. The transcript will be produced and normal in length B. The transcript will be produced, but shorter than normal C. The transcript will be produced, but longer than normal D. The transcript will produced, but will contain a deletion E. The transcript will not be produced

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If your mother is heterozygous for Huntington disease, which is caused by a dominant allele, the odds

of your inheriting the disorder from her are

a. 1/4. b. 1/2. c. 3/4. d. 1. e. 0.

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The movement of water up the stems of tall plants is least dependent on which of the following factors?

A. Root pressure B. Transpiration C. Cohesion of water molecules D. Water tension within the xylem

Biology & Microbiology