WorksheetsEnzymes and Vitamins
Total questions: 10
Worksheet time: 5mins
Which of the following is the reduced form of vitamin C?
Ascorbate
Ascorbic acid
Dehydroascorbic acid
Hydroascorbic acid
A molecule that inactivates enzymes by forming a strong covalent bond to an amino acid side-chain group at the enzyme's active site.
Enzyme inhibitor
competitive enzyme inhibitor
noncompetitive enzyme inhibitor
irreversible enzyme inhibitor
It is an enzyme that is composed only of proteins.
Simple enzyme
Conjugated enzyme
Apoenzyme
Holoenzyme
An enzyme that catalyzes a hydrolysis reaction in which the addition of a water molecule to a bond causes the bond to break.
oxidoreductase
transferase
hydrolase
lyase
What is the relatively small part of an enzyme's structure that is actually involved in catalysis?
substrate
cofactor
active site
enzyme-substrate complex
What model of enzyme action is depicted by the image?
Enzyme-substrate complex
Lock-and-key model
Induced-Fit Model
Absolute Model
Grapefruit is an excellent source of vitamin C. The pink and red colors of grapefruit are due to the carotenoid __________.
Lycopene
Bromelain
Anthocyanin
Phytochemical
Vitamins can be synthesized by the human body.
True
False
Which of the following is NOT a fat-soluble vitamin?
Vitamin A
Vitamin K
Vitamin E
Vitamin C
A vitamin that was once called the "yellow vitamin" because of its color.
Thiamin
Niacin
Biotin
Riboflavin
