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Based on their experiment with T2 bacteriophages, Hershey and Chase concluded that

An allele for a particular trait that is only expressed in the presence of a second copy of the same allele is called

Which statement about the genetic code is false?

44. THINK:  Matt is studying how the protein transferrin enters cells. He examines cells that have taken up transferrin, and finds clathrin-coated vesicles. What mechanism was used to take transferrin into the cell?  

49. The waste material from the Golgi Apparatus will leave the cell via a process known as _____________________. 

50. If a strand of mRNA attaches to a ribosome outside of the nucleus, this is known as  __________________ .

24. Osmosis occurs as water can cross the lipid bilayer through specialized channels for water movement called ________________.  

Let P = purple flowers and p = white, and T = tall plants and t = dwarf. What are the genotypes of the gametes that are produced by a plant that is heterozygous for both traits?

41. During neuronal signaling, a change in membrane potential will cause sodium channels to open and let Na+ ions diffuse down their concentration gradient into the cell. Which of the following helps establish the concentration gradient necessary for this process to occur?  

45. The process of synthesizing proteins is known as _______________________ .