Each strand of the DNA molecule serves what function during DNA replication?
a. source of amino acids
b. source of bases
c. enzymatic function
d. DNA unwinding
e. DNA template
ANSWER: e
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Which property of phospholipids allows membrane proteins involved in the same biochemical pathway to associate with each other?
A. formation of lipid rafts B. flip-flop of individual phospholipids C. amphipathic nature of the phospholipids D. decreased fluidity of the membrane due to carbon-carbon double bonds
Which of the following fruits, vegetables or grains are produced by eudicots? Select all correct choices
A. wheat B. blueberries C. rice D. sunflower seeds E. carrots
Which of the following statements about veins is false?
A. Veins located in the head, limbs, and lower body have one-way valves that help prevent blood from pooling due to gravity. B. The blood pressure within the veins is much lower than the blood pressure within the arteries. C. Veins have thinner walls than arteries. D. As much as 80% of the total blood volume resides in the venous circulation at any given time. E. None of the answer options is false.
Observing replication of circular plasmid DNAs by electron microscopy showed that:
A. replication initiates at multiple origins, creating multiple replication bubbles in the plasmid. B. template strands completely unwind before replication starts. C. replication initiates from a single origin, creating a single replication bubble in the plasmid. D. the plasmid DNA must become linear before replication can initiate at each end of the linear plasmid. E. replication occurred only at one replication fork of the bubble created.