Lactobacillus acidophilus ferments _____in the vagina into____, which protects against pathogenic microbes.

a) pyruvate, citric acid
b) glycogen, pyruvate
c) Lactic acid, citric acid
d) glycogen, lactic acid


Answer: d) glycogen, lactic acid

Biology & Microbiology

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Four of the five answers listed below are related by a common source. Select the exception

a. calcitonin b. sex hormones c. cortisol d. epinephrine e. aldosterone

Biology & Microbiology

A(n) ________ refers to the complete set of DNA within the chromosomes of an individual

Fill in the blank(s) with correct word

Biology & Microbiology

Which of the following statements about the lac operon is not true?

a. When the inducer binds to the repressor, the repressor can no longer bind to the operator. b. When the inducer binds to the operator, transcription is stimulated. c. When the repressor binds to the operator, transcription is inhibited. d. When the inducer binds to the repressor, the shape of the repressor is changed. e. The repressor has binding sites for both DNA and the inducer.

Biology & Microbiology

Plant cells that give rise to two cells, one of which is free to differentiate into various kinds of cells that contribute to the plant body, are called

A. meristematic cells. B. parenchyma cells. C. lateral cells. D. primary cells. E. endodermal cells.

Biology & Microbiology