Resistance in bacterial strains develops when the strain is able to inactivate the drug. For example, strains resistant to penicillin produce _______ which breaks the betalactam ring.

a. peptidase
b. polymerase
c. proteinase
d. beta-lactamase


Ans: d. beta-lactamase

Biology & Microbiology

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In plants, the long-distance transport of substances is called transpiration

Indicate whether the statement is true or false.

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Elastic cartilage is found

a. in the nose. b. at the ends of bones. c. in the external ear. d. between vertebrae. e. embryonic skeleton.

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If a trait is X-linked recessive, who would express the trait?

A) females homozygous for the dominant allele and males hemizygous for the recessive allele B) heterozygous females and males hemizygous for the dominant allele C) females homozygous for the recessive allele and males hemizygous for the recessive allele D) females homozygous for the recessive allele and males hemizygous for the dominant allele E) the same proportions of females and males

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True or False: If an individual is infected with a pathogen, the antibody titer to that pathogen will decrease

a. TRUE b. FALSE

Biology & Microbiology