Which of the following is FALSE when comparing RNA and DNA?
A. Both have a 5' end and a 3' end.
B. Both contain nucleotides connected by phosphodiester linkages.
C. Both contain phosphate groups.
D. Both are composed of nucleotides that contain sugars.
E. Both are composed of purines and pyrimidines.
F. Both are composed of identical nucleotides.
G. Both are composed of nucleotides that contain a phosphate group, a pentose sugar, and a nitrogenous base.
Answer: F
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Charles Keeling's work demonstrated that, over the last five decades, atmospheric CO2 levels have (collectively) increased
A. true B. false
All organisms fit into one of the two following
categories.
a. consumers and decomposers b. producers and decomposers c. producers and consumers d. scavengers and detritivores e. consumers and scavengers
Members of which of the following groups can
be single-celled producers?
a. plantae b. protista c. bacteria d. bacteria and protista e. bacteria and plantae
The inner mitochondrial membrane contains proteins that
a. synthesize ATP. b. pump protons. c. transport pyruvate and fatty acids. d. All of the above