What are proteins built from?
Amino acids
A LITTLE HEAD START
MCAT basics · Proteins & enzymes
Biochemistry · 20 cards · Recall starter library
20 foundational protein and enzyme concepts for early MCAT review.
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Which bond connects amino acids in a protein?
Peptide bond
Which protein structure is the amino-acid sequence?
Primary structure
Which protein structure includes alpha helices and beta sheets?
Secondary structure
What mainly stabilizes alpha helices and beta sheets?
Backbone hydrogen bonds
Which protein structure describes one chain’s overall shape?
Tertiary structure
Which protein structure describes multiple associated chains?
Quaternary structure
What does denaturation disrupt?
A protein’s native shape
Which amino-acid region differs between amino acids?
Side chain or R group
Which interaction can link two cysteine side chains?
Disulfide bond
Which amino acid lacks a chiral alpha carbon?
Glycine
What does an enzyme usually lower?
Activation energy
Does an enzyme change a reaction’s overall free-energy change?
No
Is an enzyme consumed by its catalytic reaction?
No
What binds at an enzyme’s active site?
Substrate
What describes active-site adjustment during binding?
Induced fit
Which inhibitor competes for an active site?
Competitive inhibitor
Where does an allosteric regulator bind?
A regulatory site distinct from the active site
What is a non-protein helper required by some enzymes called?
Cofactor
What is an organic enzyme helper often called?
Coenzyme
References & scope
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