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WorksheetsENZYME
Total questions: 20
Worksheet time: 20mins
Which substance is made up of amino acids?
Fats
Pepsin
Urea
Glycogen
Starch and cellulose are substances that are made up of many units of
fatty acids.
glycerol.
monosaccharides.
amino acids.
Which type of carbohydrate is found in large quantities in the liver?
Starch
Glucose
Sucrose
Glycogen
Which of the following is not true about saturated and unsaturated fats?
Saturated fats contain more cholesterol than unsaturated fats.
Saturated fats do not have double bonds while unsaturated fats have at least one double bond.
Saturated fats have less hydrogen atoms compared to unsaturated fats.
Saturated fats are solids while unsaturated fats are liquids at room temperature.
There are four levels of organisation in protein structure. Which protein is formed when a polypeptide chain is coiled to form an alpha-helix or folded into beta-pleated sheets?
Primary structure
Secondary structure
Tertiary structure
Quarternary structure
The diagram shows the mechanism of enzyme action.
What does P represent?
Enzyme
Substrate
Enzyme-substrate complex
Products of the reaction
Organic compounds are chemical compounds that contain the element
hydrogen.
carbon.
oxygen.
nitrogen.
Lactose is made of
two fructose molecules.
two glucose molecules.
one glucose molecule and one fructose molecule.
one glucose molecule and one galactose molecule.
A triglyceride molecule is made up of
amino acids.
three glucose molecules
one molecule of glycerol and three molecules of fatty acids.
three glycerol molecules.
Proteins are made up of the elements
carbon, hydrogen and oxygen.
carbon, hydrogen, oxygen and nitrogen.
carbon, oxygen and nitrogen.
nitrogen and hydrogen.
Proteins are made up of basic units or monomers called
monosaccharides.
amino acids.
nucleotides.
glycerol.
Excess amino acids cannot be stored in the body. They are broken down by a process known as
hydrolysis.
reduction.
deamination.
decomposition.
Enzymes are
Fat
Protein
Carbohydrates
Protein and carbohydrates
A small amount of enzymes can act on a large amount of substrate because
enzymes do not change after a reaction and can be used again.
a little enzyme can supply enough energy to carry out a reaction.
as the reaction is going on, more enzymes are produced.
enzymes act in a all or none situation.
Which of the following is not true about enzymes?
Enzymes are denatured at temperatures above 60oC.
Enzymes can catalyse chemical reactions.
All enzymes react optimally at a neutral pH.
Reaction of enzymes is reversible.
In the reaction:
Maltose + water ---> glucose + glucose. What is the enzyme involved in this reaction?
Maltase
Pepsin
Lipase
Catalase
The graph shows the effect of temperature on the activity of enzyme X.
The enzyme will be denatured at
below 0oC
between 0oC to 10oC
between 40oC to 50oC
above 60oC
The enzyme rennin is used in industry
to
coagulate milk proteins
coagulate yoghurt.
concentrate cheese.
ripen cheese.
The specificity of an enzyme is due to
the bond between the enzyme molecules.
the presence of certain ions on the surface of the enzyme.
the configuration of the enzyme molecules.
the presence of a co-factor.
Extracellular enzymes are
synthesized in the cell and achieve their effects outside the cell.
have their effects inside and outside the cell.
controls the chemical reactions inside the cell.
synthesized outside the cell and achieve their effects outside the cell
