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WorksheetsS32T5 & S32T10 QUIZ 1: MOLECULES OF LIFE
Total questions: 15
Worksheet time: 7mins
Water is a universal solvent due to its
low viscosity
polar molecules
high specific heat capacity
high boiling point
Why does ice float in liquid water?
The liquid water molecules have more kinetic energy and thus support the ice.
The ionic bonds between the molecules in ice prevent the ice from sinking.
Hydrogen bonds stabilize and keep the molecules of ice farther apart than the water molecules of liquid water.
The crystalline lattice of ice causes it to be denser than liquid water.
The unique attractive forces that keep molecules of water together are called
strong forces
adhesion
hydrogen bonds
cohesion
Lactose is a sugar in milk, is composed of one glucose molecule joined by a glycosidic bond to one galactose molecule. How is lactose classified?
As a pentose
As a monosaccharide
As a disaccharide
As a polysaccharide
The hydrolysis of triglyceride will yield
three fatty acids and one glycerol
three glycerols and one fatty acid
two fatty acids and three glycerols
one fatty acid, one amino acid and one glucose
How many double bonds does a saturated fatty acid have?
0
1
2
3
What monomers make up proteins?
Starch
Enzymes
Nucleic acids
Amino acids
The unique characteristic of each amino acid is determined by
its R group
its amino group
the type of peptide bond
its position on the polypeptide chain
What are the bonds between amino acids called?
Hydrogen bonds
Peptide bonds
Ionic bonds
Covalent bonds
At which levels of protein structure do hydrophobic interactions occur?
Quaternary only
Tertiary and quaternary.
Primary, secondary and tertiary
Primary, secondary, tertiary and quaternary.
Which statement about the deoxyribonucleic acid molecule is NOT TRUE?
It contains genetic information in its nucleotide.
It consists of two strands which are parallel to one another.
It contains the bases adenine, guanine, thymine and cytosine
Its sugar unit is deoxyribose which has a hydrogen group attached to the second carbon
Adenine comprises 36% of the nitrogenous bases in the DNA of cells from a bacterial clone. What is the percentage of guanine in the DNA?
14%
18%
36%
64%
What type of sugar and bond are found in DNA molecule?
Triose , Hydrogen bond
Pentose , Peptide bond
Deoxyribose , Hydrogen bond
Hexose , Hydrogen bond
Glucose dissolves in water because
it ionizes
it is hydrophobic
it is a polysaccharide
it has polar hydroxyl groups that interact with polar water molecules
FIGURE shows a nucleotide found in RNA. Which is TRUE about molecule X, Y and Z?
X = Phosphate group Y = Deoxyribose sugar Z = 4 types
X = Phosphate group Y = Ribose sugar Z = 4 types
X = Nitrogenous base Y = Ribose sugar Z = 5 types
X = Phosphate group Y = Deoxyribose sugar Z = 5 types
