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

1	Which of the following statements about bactoprenol is FALSE?
	A)	it is a protein carrier
	B)	its active form is bactoprenol-phosphate
	C)	it binds UDP-N-acetyl muramic acid first and then UDP-N-acetyl glucosamine
	D)	it is recycled by a pyrophosphatase
	E)	choose this answer if all of the above are TRUE
2	Which of the following statements best describes the FINAL structure of the peptide chain in peptidoglycan?
	A)	tetrapeptide linked to N-acetyl glucosamine
	B)	tetrapeptide linked to N-acetyl muramic acid
	C)	pentapeptide linked to N-acetyl glucosamine
	D)	pentapeptide linked to N-acetyl muramic acid
	E)	pentapeptide linked to both N-acetyl glucosamine and N-acetyl muramic acid
3	In Escherichia coli, the crosslinking of peptidoglycan layers occurs between the amino acids
	A)	D-alanine and D-alanine.
	B)	D-alanine and L-alanine.
	C)	D-alanine and meso-diaminopimelic acid.
	D)	L-alanine and meso-diaminopimelic acid.
	E)	L-alanine and D-glutamic acid.
4	Peptidoglycan is a structure that is only found in bacteria.
	A)	True
	B)	False
5	During peptidoglycan formation amino acids are added without the help of transfer RNA and ribosomes.
	A)	True
	B)	False