An organism that obtains its energy by oxidizing organic or inorganic substances is a(n) ____
a. autotroph
b. auxotroph
c. heterotroph
d. chemotroph
e. phototroph
ANSWER: d
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The nucleosome core particle is composed of ____
a. DNA b. helicase c. single-stranded binding proteins d. RNA primer e. histones
DNA is more stable than RNA for storing genetic information because ____
a. uracil needed for RNA synthesis is far less common than thymine needed for DNA synthesis b. RNA breaks more easily and accumulates more mutations than DNA does c. DNA is easier to build from its component molecules d. DNA requires less energy to construct than RNA does e. RNA molecules are longer than DNA molecules and thus more prone to breakage
Compare the functions of roots with those of shoots. How are they similar and how are they different?
What will be an ideal response?
A red blood cell has lost its nucleus to make more space for carrying oxygen. This is an example of ________
A) the relationship between structure and function B) a cell whose DNA is circular C) a cell that is not living D) a prokaryotic cell