The following is a list of events involved in the activation of a cell by a steroid hormone. Which one of the following answers best represents the order in which the steps occur?
1. cellular response to the hormone
2. activation of a gene
3. formation of a hormone-receptor complex
4. diffusion of the hormone through a target cell membrane
5. production of a protein
A) 4, 3, 2, 5, 1
B) 2, 5, 4, 3, 1
C) 5, 3, 4, 1, 2
D) 2, 5, 1, 3, 4
E) 4, 3, 2, 1, 5
A
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Answer the following statement true (T) or false (F)
Animals that see only black and white have predominantly what type of photoreceptors?
a. rod cells b. cone cells c. dendrites d. photo discs
Permafrost and low rainfall are characteristic of which biome?
a. boreal forest b. montane coniferous forest c. arctic tundra d. desert e. chaparral
Almost all enzymes are
a. carbohydrates. b. proteins. c. lipids. d. nucleic acids. e. amino acids.