Ribosomes are made up of multiple subunits of RNA and protein. They are important in cellular function because
A) they are storage bodies for the cell.
B) the provide structural support in the cytoskeleton.
C) they are the site of protein synthesis.
D) they contain genetic information.
Ans: C) they are the site of protein synthesis.
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Scientists want to determine whether chemical X, a component of fertilizer, is harmful to fish. They treat fish in the
laboratory with increasing amounts of the chemical for one week and then measure their viability. Fish that are not treated with chemical X are considered ____.
a. experimental data b. controls c. replicates d. experimental variables e. the null hypothesis
In facilitated diffusion, the membrane components responsible for transport are proteins
Indicate whether the statement is true or false.
"K" is the elemental symbol for
A. copper. B. potassium. C. krypton. D. nickel. E. phosphorus.
Whose discovery of streptomycin stimulated an intense search for other antibiotics?
A. Ehrlich B. Waksman C. Pasteur D. Fleming