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WorksheetsChemicals of Life
Total questions: 12
Worksheet time: 39mins
Name
Class
Date
1.
When two monomers or more of monosaccharides combine they form a molecule called a _______________.
a)
Polysaccharide
b)
Lipid
c)
Nucleic acid
d)
Protein
2.
A function of a lipid is________________.
a)
Short term energy
b)
Energy storage
c)
Structures and enzymes
d)
Hereditary information
3.
A ___________________ is a macromolecule that stores information.
a)
Lipid
b)
Carbohydrate
c)
Amino Acid
d)
Nucleic Acid
4.
A monomer unit that makes up lipids is __________________ and _____________.
a)
Saccharides, nucleotides
b)
Amino acids, glycerol
c)
Glycerol, saccharides
d)
Fatty acids, glycerol
5.
__________________ may be fats, oils, or waxes.
a)
Lipids
b)
Carbohydrates
c)
Proteins
d)
Nucleic Acids
6.
This molecule is found in cell membranes forming a bilayer
a)
Protein
b)
Phospolipid
c)
Carbohydrate
d)
Nucleic acid
7.
Organic molecules are from living things and always contain the _____________ atom.
a)
Iron
b)
Carbon
c)
Potassium
d)
Nitrogen
8.
Which of the following is an incorrect association.
a)
Fatty acids, lipids
b)
Nucleotides, nucleic acids
c)
Monosaccharides, lipids
d)
Amino acids, proteins
9.
Of the elements essential to life, _____________________ is a central element in a living organisms organic compounds.
a)
Carbon
b)
Oxygen
c)
Nitrogen
d)
Hydrogen
10.
A change in an organism's surroundings that causes it to react is called
a)
a stimulus.
b)
a response.
c)
development.
d)
energy.
11.
Water is the most abundant molecule found in living organisms. Most mammals, in fact are approximately 70% water by weight. About two-thirds of this water is present inside cells. The other one-third is present outside cells (e.g., in blood plasma or other body fluids). Why is water so important to cells?
a)
Water is stored in the cells to be used when the organism gets thirsty.
b)
Almost all the chemical reactions in life processes occur in solutions with water.
c)
Water determines which proteins are translated from the cellular DNA.
d)
The main structural component found in plasma membranes and cell walls is water.
12.
Match the following carbohydrate molecules with the class of molecule that they belong to:
Molecules: (I) Glucose; (II) Starch; (III) Sucrose
Classes:
A) Polysaccharides
B) Disaccharides
C) Monosaccharides
Molecules: (I) Glucose; (II) Starch; (III) Sucrose
Classes:
A) Polysaccharides
B) Disaccharides
C) Monosaccharides
a)
I-A; II-B; III-C
b)
I-B; II-A; III-C
c)
I-C; II-A; III-B
d)
I-C; II-B; III-A
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