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
Biology & Microbiology
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.
Biology & Microbiology
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