Proteins

Proteins are polymers of __________.

• amino acids

• fatty acids

• carboxylic acids

• nucleic acids

All proteins

• have a unique structure that determines their unique function.

• are exactly the same in function but different in structure.

• are exactly the same in structure but different in function.

• are enzymes.

The order of amino acids determines the ______ and ultimately the function of a protein.

• shape

• color

• flavor

• texture

Enzymes are ________ that act as ________.

• proteins, catalysts

• amino acids, proteins

• proteins, amino acids

• catalysts, carbohydrates

What is the function of enzymes in living things?

• increase the rate of chemical reactions

• form the basis of the plasma membrane

• main energy molecule for a cell

• insulation and protection

What is a peptide bond?

• Bond that holds two amino acids together.
• A bond that holds hydrogen and oxygen molecules together.
• A bond that holds the phosphate group of one nucleotide and a sugar of a neighboring nucleotide.
• A bond that is formed by the sharing of electrons.

How many different amino acids are there?

• 15
• 20
• 25
• 30

The diagram shows the structure of an amino acid. Which type of molecule is formed from amino acids?

• lipids
  
• proteins
  
• carbohydrates
  
• nucleic acids
  

What is a long chain of amino acids called?

• Polysaccharide

• Lipid

• Carbohydrate

• Polypeptide

• Nucleic acid

Alpha helix and beta sheet are examples of what type of protein structure?

• Primary

• Secondary

• Tertiary

• Quaternary