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Section 1: Proteins

Proteins


1.	A chain of 15 amino acids joined by peptide bonds is called a(n) __________. Need a Hint?
		A)	enzyme
		B)	peptide
		C)	polypeptide
		D)	protein


2.	What is the name given to a series of amino acids that are linked by peptide bonds? Need a Hint?
		A)	protein
		B)	lipid
		C)	carbohydrate
		D)	ester


3.	What two functional groups are contained in all amino acids? Need a Hint?
		A)	carbonyl and halogen
		B)	carboxyl and amino
		C)	amido and ether
		D)	amino and amido


4.	What type of chemical functional group is made when a peptide bond is formed? Need a Hint?
		A)	amine
		B)	ester
		C)	amide
		D)	carbonyl


5.	A polypeptide of 50 or more amino acids is called a protein. What kind of molecule is the polypeptide? Need a Hint?
		A)	isomer
		B)	monomer
		C)	stereomer
		D)	polymer


6.	How many different amino acids are commonly found in living things? Need a Hint?
		A)	20
		B)	10
		C)	15
		D)	30


7.	Proteins can form two three-dimensional structures. Changes in temperature, pH, and other factors will disrupt these structures. By what name do we know this disruption? Need a Hint?
		A)	denaturation
		B)	helix
		C)	sheet
		D)	polypeptide


8.	Most enzymes are ____________. Need a Hint?
		A)	lipids
		B)	carbohydrates
		C)	proteins
		D)	denatured


9.	Enzymes act as __________ in your body. Need a Hint?
		A)	catalysts
		B)	carbohydrates
		C)	lipids
		D)	substrates


10.	To function properly, the reactive site of an enzyme must have the same shape as the substrate to which it binds. This fit is commonly known as _____________. Need a Hint?
		A)	tongue and groove
		B)	lock and key
		C)	projection and enclosure
		D)	heme and globin


11.	What are the four primary functions and uses of proteins in living cells? Need a Hint?
		A)	energy storage, digestion, denaturation, transport
		B)	recycling, digestion, polymerization, transport
		C)	catalysis, structure, transport, carrying signals
		D)	denaturation, structure, transport, carrying signals