Which of the following proteins is likely to act as a gene repressor?
(a) factor X
(b) factor Y
(c) factor Z
(d) none of the above
Answer: (c) factor Z
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The microbial oxygen-consuming capacity of a water sample is called its
A) chemical oxygen demand. B) biochemical capacity. C) biochemical oxygen demand. D) chemical capacity.
The simultaneous movement of sucrose into a cell against its concentration gradient and protons into a cell with their concentration gradient is best described as an example of
a. symport. b. passive diffusion. c. antiport. d. facilitated diffusion. e. active transport.
Brush border cells have:
a. villi b. acidic secretions c. microvilli d. bile secretions e. smooth muscle
In Arabidopsis thaliana, a model organism in plant genetics, there are three classes of genes that control the development of floral structures: A, B, and C. Mutations of these genes cause organs to form in inappropriate places
What category of genes are they?