IB Biology Protein

What are polypeptides?

• chains of carbohydrates
• chains of amino acids
• chains of fatty acids
• chains of nucleic acids

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NGSS.HS-LS1-1

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The reaction which occurs when a polypeptide is formed is called .....

• a condensation reaction
• a hydrolysis reaction
• a hydration reaction
• a peptide reaction

Which parts of the amino acid react with another amino acid to form a peptide bond?

• The carboxyl group and the R group
• The carboxyl group and the amino group
• The amine group and the R group
• The R group and carbon backbone

What is the name of the bond that is formed when a polypeptide is made?

• Ester bond
• Glycosidic bond
• Peptide bond
• Amine bond

Amino acids are different from one another due to .......

• their differing carboxyl group
• their differing amine group
• their differing R group
• their differing carbon backbone

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NGSS.HS-LS1-6

How many amino acids can be in a polypeptide? 

• 20
• 200
• 2,000
• 20,000+

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NGSS.HS-LS1-6

Due to organisms having 20 amino acids that can be sequenced in any order and in any chain length, the number of possible combinations in a polypeptide is almost infinite. 

• True
• False

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NGSS.HS-LS1-1

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Where does a cell get the information it needs to determine which order the amino acids should be in a polypeptide?

• Ribosomes
• DNA
• RNA
• The sequence is random

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NGSS.HS-LS1-1

Can more than one polypeptide chain link together?

• Yes
• No

The amino acid sequence determines the shape or conformation of the resulting protein because of......

• hydrogen bonding
• ionic bonding
• covalent bonding
• all of these answers

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NGSS.HS-LS1-1