WorksheetsMacromolecules 24-25
Total questions: 26
Worksheet time: 13mins
Name
Class
Date
1.
Milk contains a high concentration of the carbohydrate lactose. What is the basic structure of lactose?
a)
two monosaccharides joined together
b)
a chain of amino acids in a helix shape
c)
two fatty acids joined to a phosphate group
d)
a chain of alternating sugar and phosphate groups
2.
A cell membrane has a double layer of molecules. These molecules are made up of a phosphorus-containing “head” and two long, fatty acid “tails.”Which of the following best explains why the molecules are classified as lipids?
a)
They contain phosphorus.
b)
They form a double layer.
c)
They are made up of fatty acids.
d)
They are found in the cell membrane.
3.
Which group of organic compounds contains fatty acids?
a)
carbohydrates
b)
lipids
c)
nucleic acids
d)
proteins
4.
What do disaccharides, such as sucrose, and polysaccharides, such as starch, have in common?
a)
They are lipids made of fatty acids.
b)
They are proteins made of amino acids.
c)
They are nucleic acids made of nucleotides.
d)
They are carbohydrates made of simple sugars.
5.
A student is preparing to run in a school track competition. For the quickest source of energy, the student should eat a food that contains a high percentage of
a)
carbohydrates
b)
fat
c)
proteins
d)
sodium
6.
Which type of molecule in the yolk of a chicken egg provides the most energy for a developing chick?
a)
lipid
b)
nucleic acid
c)
salt
d)
water
e)
protein
7.
Which of the following best describes the composition of a nucleotide?
a)
a pair of six-carbon rings attached to each other
b)
a carbon atom joined to hydrogen and three functional groups
c)
a chain of carbon atoms with a carboxyl group bonded to one end
d)
a five-carbon sugar attached to a phosphate group and a nitrogenous base
8.
One category of organic compounds contains molecules composed of long hydrocarbon chains. The hydrocarbon chains may be saturated or unsaturated. Which of the following categories of organic compounds contains these molecules?
a)
carbohydrates
b)
lipids
c)
nucleic acids
d)
proteins
9.
Some bacteria contain a substance called nitrogenase. Nitrogenase catalyzes the chemical reaction that converts atmospheric nitrogen (N2) into ammonia (NH3). Nitrogenase is an example of which of the following?
a)
a sugar
b)
an enzyme
c)
a nucleotide
d)
an amino acid
10.
Which of the following categories of organic molecules is correctly paired with one of its functions?
a)
nucleic acids—digest dead cells
b)
lipids—give quick energy to cells
c)
carbohydrates—store genetic information
d)
proteins—provide structure in skin, hair, and nails
11.
Lemurs’ bodies are adapted to efficiently store energy for times when food is scarce. This adaptation may help to explain how lemur ancestors survived the trip across the Mozambique Channel from mainland Africa to Madagascar. Which of the following types of molecules are primarily used for long-term energy storage in the lemur?
a)
lipids
b)
monosaccahrides
c)
proteins
d)
nucleic acids
12.
In the human body, fibrinogen is necessary for sealing cuts and stopping the loss of blood. Since fibrinogen is made of chains of amino acids, it is an example of which type of organic molecule?
a)
carbohydrate
b)
protein
c)
fatty acid
d)
nucleic acid
13.
Which element is the main component of all organic molecules?
a)
Carbon
b)
Nitrogen
c)
Hydrogen
d)
Oxygen
14.
Cellulose is a complex carbohydrate that makes up the cell walls of plants. Which of the following elements are main components of cellulose?
a)
Calcium, magnesium, and potassium
b)
Carbon, hydrogen, and oxygen
c)
Nitrogen, phosphorus, and sulfur
d)
Iron, zinc, and copper
15.
polymer
a)
A long molecule consisting of many similar or identical monomers linked together.
b)
Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus, Sulfur-elements that make up all living things.
c)
They are proteins made of amino acids.
d)
Complex ions reacting to water
16.
monomer
a)
A small molecule that can join to form a polymer.
b)
A large molecule made of many monomers.
c)
A chemical reaction that breaks down polymers.
d)
A type of protein that builds muscle.
17.
What is the definition of an atom?
a)
An atom is a type of chemical bond between elements.
b)
the smallest particle of an element
c)
An atom is the largest unit of matter in the universe.
d)
An atom is a molecule made up of two or more elements.
18.
What are the four classes of macromolecules?
a)
Vitamins, Minerals, Water, Fiber
b)
Carbohydrates, Proteins, Lipids, Nucleic Acids
c)
Enzymes, Hormones, Antibodies, Carbohydrates
d)
Fats, Sugars, Proteins, Salts
19.
What is the definition of a molecule?
a)
A molecule is two or more atoms bonded together.
b)
A molecule is a type of chemical reaction.
c)
A molecule is a single atom.
d)
A molecule is a mixture of different substances.
20.
What is the definition of a macromolecule?
a)
A macromolecule is a simple sugar that provides energy to cells.
b)
A macromolecule is a type of atom found in all living organisms.
c)
A macromolecule is a small molecule that cannot be broken down further.
d)
A very large organic molecule composed of many smaller molecules
21.
What is a nucleotide?
a)
A nucleotide is a type of protein.
b)
A nucleotide is a complex carbohydrate.
c)
A nucleotide is a single sugar molecule.
d)
A nucleotide is a molecule made up of a nitrogenous base, a sugar, and a phosphate group.
22.
what is an amino acid?
a)
Amino acids are a type of carbohydrate.
b)
Amino acids are inorganic compounds found in minerals.
c)
monomers of proteins
d)
Amino acids are vitamins essential for metabolism.
23.
What is a nucleotide?
a)
A nucleotide is a molecule made up of a nitrogenous base, a sugar, and a phosphate group.
b)
A protein is a vitamin that helps in digestion.
c)
A protein is a small molecule that cannot perform any functions.
d)
A protein is a type of carbohydrate found in plants.
24.
What is a carbohydrate?
a)
A carbohydrate is a type of protein found in meat.
b)
A carbohydrate is a mineral essential for bone health.
c)
macromolecule, C,H,O in 1:2:1 ratio. energy source and structural functions
d)
A carbohydrate is a synthetic compound used in plastics.
25.
What is a lipid?
a)
Energy-rich organic compounds, such as fats, oils, and waxes, that are made of carbon, hydrogen, and oxygen.
b)
A lipid is a type of carbohydrate that is soluble in water.
c)
A lipid is a protein that helps in muscle building.
d)
A lipid is a mineral that is essential for bone health.
26.
What is the definition of a nucleic acids?
a)
Nucleic acids are proteins that catalyze biochemical reactions.
b)
Nucleic acids are small molecules that provide energy to cells.
c)
Nucleic acids are lipids that form cell membranes.
d)
DNA and RNA
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