Which one of the following statements about RNA is correct?
A. RNA is a more stable molecule than DNA.
B. RNA has the same 5-carbon sugars as DNA.
C. RNA uses the same pyrimidine bases as DNA.
D. RNA uses the same purine bases as DNA.
E. All of these choices are correct.
Answer D
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Gene regulation in multicellular organisms leads to differential gene expression and specialized cell functions
A. true B. false
What two abiotic factors are considered to most affect organisms?
a. fire and water b. the atmosphere and fire c. temperature and fire d. temperature and water e. climate and fire
In an aquatic ecosystem, what name is given to the region where photosynthesis can occur?
A) pelagic zone B) aphotic zone C) benthic realm D) photic zone
During DNA replication, the enzyme called DNA ______ joins the newly synthesized DNA segments.
Fill in the blank(s) with the appropriate word(s).