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Protein Synthesis (Quiz 4)

How is protein synthesis similar to the catalysis of a reaction by an enzyme? Protein synthesis is a series of chemical reactions in which molecules are brought into contact with one another and chemical bonds are formed and broken. The key event in protein synthesis is the formation of bonds between adjacent amino acids in the protein and the breaking of bonds between the same amino acids and the tRNA molecules that first bring the amino acids to the ribosomes. The function of the ribosome is to bind the tRNA molecules and then move through the ribosome. As the tRNAs are moved, the ribosome’s configuration brings the amino acids into contact and then severs the bonds between tRNA and amino acid. In a general sense, RNA is acting as an enzyme that catalyzes the reactions that form the amino acid chain.

View the animation below, then complete the quiz to test your knowledge of the concept.






1Transcription is characterized by...
A)a messenger RNA molecule synthesized from the DNA molecule in the nucleus.
B)a transfer RNA molecule synthesized from the DNA molecule in the nucleus.
C)a ribosomal RNA molecule synthesized from the DNA molecule in the nucleus.
D)the blueprint of the RNA molecule used to bind amino acids together to form proteins.
E)the binding of enzymes to their substrates to produce products.



2Translation is characterized by...
A)a messenger RNA molecule synthesized from the DNA molecule in the nucleus.
B)a transfer RNA molecule synthesized from the DNA molecule in the nucleus.
C)a ribosomal RNA molecule synthesized from the DNA molecule in the nucleus.
D)the blueprint of the RNA molecule used to bind amino acids together to form proteins.
E)the binding of enzymes to their substrates to produce products.



3Which of the following is a true statement concerning protein synthesis?
A)translation occurs in the nucleus and transcription occurs in the cytoplasm.
B)transcription occurs in the nucleus and translation occurs in the cytoplasm.
C)translation occurs in the nucleus and transcription occurs in the mitochondria.
D)transcription occurs in the nucleus and translation occurs in the mitochondria.
E)for every RNA produced, there is an enzyme or enzyme product produced.



4The products of protein synthesis are exclusively enzymes and enzyme products.
A)True
B)False



5The sequence for protein synthesis is translation, then transcription.
A)True
B)False







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