Cells are treated with a drug that blocks purine synthesis. Which bases would not be made in those treated cells?

A. cytosine, thymine, and uracil
B. adenine and guanine
C. adenine and thymine
D. cytosine and guanine


B

Biology & Microbiology

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Which of these acts as a countercurrent multiplier?

a. collecting duct b. glomerulus c. loop of Henle d. vasa recta

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Amphibians can accomplish gas exchange by using

a. gills. b. lungs. c. respiration through the skin. d. both gills and lungs. e. gills, lungs and respiration through the skin.

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The spinal cord runs through the vertebral column and connects with the brain through the

__________. Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

Into which group would you place a unicellular organism that has 70S ribosomes and a peptidoglycan cell wall?

A) Animalia B) Bacteria C) Fungi D) Plantae E) Protist

Biology & Microbiology