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

1	Which of the following combinations are correctly matched?
	A)	70S – ribosome
	B)	anticodon – mRNA
	C)	codon – tRNA
	D)	A and B
	E)	A, B, and C
2	Which of the following occurs as the ribosome shifts down the mRNA by a distance of one codon?
	A)	the tRNA that was in the A site picks up another amino acid
	B)	the tRNA that was in the A site releases the growing polypeptide chain
	C)	the tRNA that was in the A site moves into the P site
	D)	the tRNA that was in the P site moves into the A site
	E)	the tRNA that was in the P site picks up another amino acid
3	A certain polypeptide is 100 amino acids in length. During translation of this polypeptide, how many amino acids entered through the A site of the ribosome?
	A)	1
	B)	9
	C)	50
	D)	99
	E)	100
4	The large ribosomal subunit joins the translation initiation complex after the small subunit has already joined.
	A)	True
	B)	False
5	Elongation of the polypeptide chain is terminated when a stop codon enters the P site of the ribosome.
	A)	True
	B)	False