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WorksheetsEnzymes and Biomolecules
Total questions: 25
Worksheet time: 13mins
An (a) is a special type of catalyst that is made by a living organism. We sometimes call them biological catalysts.
What is the name of the special region of an enzyme that binds to the substrate?
Active area
Unique site
Complementary region
Active site
Any substance that is acted upon by an enzyme is called a:
Coenzyme
Substrate
Vitamin
Polypeptide
Pancreatic amylase is a digestive enzyme found in the small intestine. It helps break down large starch molecules later in the digestive process. Pancreatic amylase is unable to break down proteins.
Which of the following best explains why pancreatic amylase is able to break down starches, but not proteins?
Enzymes are specific to their substrates
Proteins are too large to be affected by enzymes
Enzymes and proteins cannot break down other proteins
Proteins are able to easily denture enzymes
At first, scientists thought that in order for an enzyme to catalyse a reaction, the substrate had to fit perfectly into the active site.
What was the name for this model of enzyme action?
The original model
The lock and key model
The induced fit model
The induced key model
We now know that in order for an enzyme to catalyse a reaction, the enzymes active site actually changes shape slightly as it binds to the substrate.
What do we call this model of enzyme action?
The new model
The lock and key model
The induced fit model
The induced key model
An enzyme speeds up a reaction by:
lowering the activation energy
raising the activation energy
releasing energy
absorbing energy
What effect does high temperature have on enzymes?
Denatures them
Inactivates them
Destroys them
oxygen, water, carbon, nitrogen
What does organic mean (in chemistry)?
It costs more at the grocery store
It contains carbon and hydrogen
It is made of many individual parts
It produces energy
What is the monomer that makes up carbohydrates?
Monosaccarides
Fatty Acids
Amino Acids
Nucleotides
What are triglycerides made of?
Monosaccarides
Fatty Acids
Amino Acids
Nucleotides
What is the monomer that makes up proteins?
Monosaccarides
Fatty Acids
Amino Acids
Nucleotides
What is the monomer that make up nucleic acids?
Monosaccarides
Fatty Acids
Amino Acids
Nucleotides
Cellulose, starch and glycogen are examples of:
monosaccharides
disaccharides
lipids
polysaccharides
What is the following molecule?
triglyceride
phospholipid
steroid
protein
What is the following molecule?
alpha glcuose
beta glucose
amino acid
disaccharide
What is the following molecule?
glucose
DNA
amino acid
disaccharide
Which protein structure describes the sequence of amino acids?
Primary structure
Secondary structure
Tertiary structure
Quaternary structure
Which of the following describes the secondary structure of proteins?
The sequence of amino acids
The α-helix and β-pleated sheet folding
The folding of the polypeptide chain due to the 'R' groups
The joining of different protein molecules to make one big molecule
Which protein structure describes a protein's three-dimensional shape?
Primary structure
Secondary structure
Tertiary structure
Quaternary structure
Haemoglobin is a quaternary protein because:
It has more than one peptide bonds
Its shape is globular
It consists of more than one polypeptide chains
It has iron in each heme group
