Who proposed the concept of chemotherapy, that compounds might selectively kill pathogens without harming people?
A) Gerhard Domagk
B) Alexander Fleming
C) Paul Ehrlich
D) Selman Waksman
E) Joseph Lister
C
Bloom's Taxonomy: Knowledge
Section: The History of Antimicrobial Agents
Learning Outcome: 10.1
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Which of the following organisms has the largest number of protein-coding genes?
a. E. coli (bacteria) b. Saccharomyces cerevisiae (yeast) c. Homo sapiens (human) d. Oryza sativa (rice) e. Drosophila melanogaster (fruit fly)
Each DNA strand has a backbone that consists of
alternating a. covalent and ionic bonds. b. nitrogen-containing bases. c. hydrogen bonds. d. sugar and phosphate molecules. e. covalent and hydrogen bonds.
Borders between patches that result from natural disturbances typically change over time
Indicate whether the statement is true or false
Potassium ions are important in the resting membrane potential and the action potential of the nerve and to the contraction of muscle cells. The concentration gradient of potassium ions is critical to both. An excess of potassium outside a neuron or
muscle cell would negate the concentration gradient. What would happen if the heart were injected with massive amounts of potassium? Explain your answer. What will be an ideal response?