During the process of photosynthesis energy from the sun is converted into
a .chemical energy in the bonds of inorganic molecules
b. chemical energy in the bonds of organic molecules
c. enzymes used to produce inorganic molecules
d. enzymes used to produce organic molecules
Ans: b. chemical energy in the bonds of organic molecules
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Mutations that change the configuration of a protein at a specific temperature are called ____ mutations
A. Neutral B. Beneficial C. Deleterious D. Conditional
Because archaeons lack peptidoglycan in their cell walls ________.
A. some have an outer layer of complex polysaccharide and some have an outer layer of protein B. some have an outer layer of complex polysaccharide C. some have an outer layer of protein D. they must always be grown in isotonic medium
Which of the following statements best summarizes the differences between DNA and RNA?
A) DNA encodes hereditary information, whereas RNA does not. B) The bases in DNA contain sugars, whereas the bases in RNA do not contain sugar. C) DNA nucleotides contain a different sugar than RNA nucleotides. D) DNA contains the base uracil, whereas RNA contains the base thymine.
What factor or factors discovered with electron microscopy distinguished prokaryotic from eukaryotic cells?
a) their size b) their color c) the types of their internal structures or organelles d) their fragility