Lipid soluble molecules are expected to cross the cell membrane by way of:
A. simple diffusion
B. signal transduction
C. facilitated diffusion
D. active transport
E. group translocation
Answer: A. simple diffusion
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a. apical dominance b. primary growth c. secondary growth d. transpiration
If RNA was the first information storage molecule, what macromolecule would have been the "next"
molecule produced in the progression toward living cells?
a. DNA b. lipids c. carbohydrates d. sugars e. proteins
Which of the following is an example of a reporter gene?
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Photosystems are mainly
a. a grouping of energy-trapping molecules. b. enzymes for splitting water. c. a cluster of ATP molecules. d. a sugar assembly site. e. assemblies of thylakoids