Which of the following is not needed for DNA replication?
A. ribosomes
B. DNA
C. nucleotides
D. enzymes
E. None of these are needed.
A
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Bacteria synthesize CDP-diacylglycerol in order to build ________, a major cell membrane phospholipid component.
A. lipopolysaccharide B. peptidoglycan C. lipid rafts D. phosphatidylethanolamine
Which of the following questions is about gene regulation? Select all correct choices
A. Why do all eukaryotes share a common genetic code? B. Where are genes for hemoglobin expressed? C. How much insulin is produced after a meal?
In which blood vessels is pressure the greatest?
a. in the veins b. in the capillaries c. in the arteries d. in the venules
The main center for homeostatic control of the internal environment is the ____.
A. pons B. medulla oblongata C. hypothalamus D. thalamus E. cerebellum