The AUC and AUA codons in mRNA both specify isoleucine. What feature of the genetic code explains this?
a.) complementarity
b.) nonsense codons
c.) universality
d.) degeneracy
Answer: d.) degeneracy
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The distance between the crests of two successive waves of light is known as the ____
a. wave frequency b. wave period c. wave distance d. wavelength e. wave space
Which of the following is true of the kidneys found
in marine animals? a. smaller than terrestrial animals b. larger and more efficient than terrestrial animals c. secrete crystalline urea to conserve water balance d. use osmotic pressure and don’t have specialized kidneys e. none of these
What is a functional connection between the nucleolus, nuclear pores and the nuclear membrane
What will be an ideal response?
In early experiments to understand the control of the cell cycle, researchers fused HeLa cells that were at different
stages of the cell cycle. What did the results of these experiments suggest?
a. The concentrations of cyclin dependent kinases (Cdks) fluctuate throughout the cell cycle. b. The concentrations of cyclins fluctuate throughout the cell cycle. c. The cell cycle has three checkpoints through which the cell must pass in order to progress through to mitosis. d. Microtubules play an essential role in the progression of the cell cycle. e. Molecules in the cytoplasm control the progression of the cell cycle.