The length of a DNA sequence is _____ than the mature mRNA transcribed from it, because
A. shorter it does not contain exons.
B. equal it was transcribed from the DNA sequence.
C. longer it does not contain introns.
D. shorter each codon of three bases encodes only one amino acid.
E. longer each codon of one amino acid encodes three bases.
Answer: B. equal it was transcribed from the DNA sequence.
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The evolution of prezygotic barriers to reproduction after postzygotic barriers already exist is called ____
a. species fusion b. reinforcement c. adaptive radiation d. geographic isolation e. hybridization
Which of the following includes all of the others?
a. sucrose b. glucose c. cellulose d. glycogen e. carbohydrate
Acid-fast cell walls contain high concentrations of
a) teichoic acid. b) peptidoglycan. c) pseudomurein. d) mycolic acid.
If a scientist were to shoot protons through an atom as Rutherford did with gold foil, he or she would likely find that
A. most of the protons deflected or bounced back from the atom. B. the atom emitted electrons. C. few of the protons passed straight through the atom. D. most of the protons were absorbed by the atom. E. most of the protons passed straight through the atom.