BIOCHEM C785 UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS
COMPREHENSIVE STUDY GUIDE
●● Amino acids can undergo a proton transfer, thus giving both a (+)
and (-) charge. This molecular state is called the ________.
Answer: Zwitterion
●● Amino acid that are unable to be synthesised from biochemical
pathways within a cell have to be consumed through dietary intake.
These are called _______ amino acids.
Answer: Essential
●● When two amino acids join together, they are joined by an aide bond.
This is also referred to as a _______ bond.
Answer: Peptide
●● Which level of protein structure involves the amino acid sequence,
but not the folding of the protein?
Answer: Primary
●● Unfolding a protein using heat is a process called ________. This
process does not affect the primary sequence of the protein.
,Answer: Denaturation
●● If a neutral amino acid is placed in a very basic environment (pH >
10), it will lose a proton (H+) from the __________ functional group.
Answer: Carboxyl - COOH
●● Disulphides bonds are covalent bonds between two _______ amino
acids.
Answer: Cysteine
●● The process of breaking the bonds between amino acids within a
polypeptide is called a ______ reaction.
Answer: Hydrolysis
●● All amino acids contain both an acidic carboxyl group and a basic
______ group.
Answer: Amino
●● Amino acids never exist in nature as neutral molecules; rather they
undergo a proton transfer to form a ______.
Answer: Zwitterion
●● Humans are unable to produce _____ of the amino acids required,
and therefore they are referred to as essential amino acids.
, Answer: 10
●● If an amino acid is placed in a very acidic environment (pH < 2)
which functional group gains a proton (H)?
Answer: Carboxyl group
●● The amino acid at the "ends" of the peptide can be either a N-
terminal amino acid or a ________ amino acid.
Answer: C-terminal
●● Which level of protein structure describes the 3D arrangement of
localised regions?
Answer: Secondary structure
●● Each turn in an alpha helix contains ____ (number) amino acid
residues.
Answer: 3.6
●● Some enzymes, such as pepsin, break down polypeptides by ______.
Answer: Hydrolysis
●● Various processes, including heating, can achieve disruption of
secondary, tertiary, and even quaternary protein structure. This type of
change in a proteins shape is termed ______ .
QUESTIONS AND CORRECT ANSWERS
COMPREHENSIVE STUDY GUIDE
●● Amino acids can undergo a proton transfer, thus giving both a (+)
and (-) charge. This molecular state is called the ________.
Answer: Zwitterion
●● Amino acid that are unable to be synthesised from biochemical
pathways within a cell have to be consumed through dietary intake.
These are called _______ amino acids.
Answer: Essential
●● When two amino acids join together, they are joined by an aide bond.
This is also referred to as a _______ bond.
Answer: Peptide
●● Which level of protein structure involves the amino acid sequence,
but not the folding of the protein?
Answer: Primary
●● Unfolding a protein using heat is a process called ________. This
process does not affect the primary sequence of the protein.
,Answer: Denaturation
●● If a neutral amino acid is placed in a very basic environment (pH >
10), it will lose a proton (H+) from the __________ functional group.
Answer: Carboxyl - COOH
●● Disulphides bonds are covalent bonds between two _______ amino
acids.
Answer: Cysteine
●● The process of breaking the bonds between amino acids within a
polypeptide is called a ______ reaction.
Answer: Hydrolysis
●● All amino acids contain both an acidic carboxyl group and a basic
______ group.
Answer: Amino
●● Amino acids never exist in nature as neutral molecules; rather they
undergo a proton transfer to form a ______.
Answer: Zwitterion
●● Humans are unable to produce _____ of the amino acids required,
and therefore they are referred to as essential amino acids.
, Answer: 10
●● If an amino acid is placed in a very acidic environment (pH < 2)
which functional group gains a proton (H)?
Answer: Carboxyl group
●● The amino acid at the "ends" of the peptide can be either a N-
terminal amino acid or a ________ amino acid.
Answer: C-terminal
●● Which level of protein structure describes the 3D arrangement of
localised regions?
Answer: Secondary structure
●● Each turn in an alpha helix contains ____ (number) amino acid
residues.
Answer: 3.6
●● Some enzymes, such as pepsin, break down polypeptides by ______.
Answer: Hydrolysis
●● Various processes, including heating, can achieve disruption of
secondary, tertiary, and even quaternary protein structure. This type of
change in a proteins shape is termed ______ .
