The production of second messengers in signal transduction offers at least two advantages, speed and
A. specificity.
B. amplification.
C. one-to-one stoichiometry.
D. reversibility.
E. affinity.
B. amplification.
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In the mid-nineteenth century Charles Darwin and Alfred Russel Wallace observed many organisms
Based on these observations they arrived to an explanation on how populations change through time. They termed it:
a. evolution. b. natural selection. c. creationism. d. natural evolution. e. genetics.
A eukaryotic chromosome consists of
a. DNA and lipids. b. RNA and proteins. c. DNA and proteins. d. DNA and carbohydrates. e. just DNA
When oxygen is released as a result of photosynthesis, it is a direct by-product of _____
A) splitting water molecules B) chemiosmosis C) the electron transfer system of photosystem I D) the electron transfer system of photosystem II
Control of the lac operon and lactose utilization in bacteria is (check all that apply)
A. controlled by the expression of three downstream genes. B. not induced in the presence of both glucose and lactose. C. only induced when there is glucose but not lactose. D. preferentially utilizing lactose as a carbon source. E. is a negative control, mediated by a repressor.