The smallest unit of an element that still retains the chemical and physical properties of that element is called a(n)
A. molecular bond.
B. isotope.
C. nucleus.
D. neutrino.
E. atom.
Answer: E
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Which molecule actually “translates” the genetic code of RNA into the language of proteins?
a. tRNA b. mRNA c. rRNA d. Amino acids
A prokaryotic large ribosomal subunit is composed of
A) tRNA and protein. B) mRNA and protein. C) rRNA and protein. D) only proteins folded together. E) only rRNAs folded together.
Which of these is NOT required for a good experimental design?
A. A control group B. Results that confirm your hypothesis C. Multiple replicates of the same experiment D. A hypothesis that can be tested E. All of the above are required for good experimental design
Oxygen crosses a plasma membrane
A) by osmosis. B) through simple diffusion. C) with the help of a nonspecific transporter. D) through facilitated diffusion. E) through porins.