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Topic 1.4-1.7 Practice Quiz

Total questions: 64

Worksheet time: 39mins

Name
Class
Date
1.

Which elements are found in all carbohydrates?

a)

Carbon, hydrogen, oxygen

b)

Carbon, nitrogen, oxygen

c)

Carbon, hydrogen, nitrogen

d)

Carbon, phosphorus, oxygen

2.

What is the monomer unit of proteins?

a)

Monosaccharide

b)

Amino acid

c)

Nucleotide

d)

Fatty acid

3.

Which of the following is a function of nucleic acids?

a)

Energy storage

b)

Information storage and transfer

c)

Structural support

d)

Catalyzing reactions

4.

Which element is found in all nucleic acids but not in all carbohydrates?

a)

Hydrogen

b)

Nitrogen

c)

Oxygen

d)

Carbon

5.

Which of the following is an example of a polysaccharide?

a)

Glucose

b)

Starch

c)

Glycerol

d)

Cholesterol

6.

Which of the following best describes a saturated fat?

a)

Contains double bonds between carbon atoms

b)

Contains only single bonds between carbon atoms

c)

Is liquid at room temperature

d)

Is a polymer of amino acids

7.

What is the primary structure of a protein?

a)

The sequence of amino acids

b)

The folding into alpha helices and beta sheets

c)

The overall 3D shape

d)

The association of multiple polypeptides

8.

Which of the following is a monomer of nucleic acids?

a)

Monosaccharide

b)

Nucleotide

c)

Fatty acid

d)

Amino acid

9.

Which element is found in proteins but not in carbohydrates or lipids?

a)

Nitrogen

b)

Oxygen

c)

Hydrogen

d)

Carbon

10.

Which of the following is a function of lipids?

a)

Catalyzing chemical reactions

b)

Long-term energy storage

c)

Genetic information storage

d)

Immediate energy source

11.

Which of the following best describes a dehydration reaction?

a)

Breaking a polymer into monomers by adding water

b)

Joining monomers to form a polymer by removing water

c)

Breaking a polymer into monomers by removing water

d)

Joining monomers to form a polymer by adding water

12.

Which structural difference distinguishes DNA from RNA?

a)

DNA contains uracil, RNA contains thymine

b)

DNA contains deoxyribose, RNA contains ribose

c)

DNA is single-stranded, RNA is double-stranded

d)

DNA contains phosphate, RNA does not

13.

Which of the following best explains why unsaturated fats are liquid at room temperature?

a)

They have more hydrogen atoms

b)

They have kinks in their fatty acid chains due to double bonds

c)

They are made of amino acids

d)

They have no carbon atoms

14.

Which level of protein structure is directly affected by hydrogen bonding between backbone atoms?

a)

Primary

b)

Secondary

c)

Tertiary

d)

Quaternary

15.

Which of the following is a correct pairing of a biomolecule and its monomer?

a)

Carbohydrate - fatty acid

b)

Protein - amino acid

c)

Lipid - nucleotide

d)

Nucleic acid - monosaccharide

16.

Which of the following best describes the quaternary structure of a protein?

a)

The sequence of amino acids

b)

The folding of a single polypeptide chain

c)

The association of multiple polypeptide chains

d)

The formation of alpha helices

17.

Which of the following is a difference between DNA and RNA nucleotides?

a)

DNA nucleotides contain ribose; RNA nucleotides contain deoxyribose

b)

DNA nucleotides contain thymine; RNA nucleotides contain uracil

c)

DNA nucleotides contain uracil; RNA nucleotides contain thymine

d)

Both contain the same nitrogenous bases

18.

Which of the following is a property of phospholipids that makes them important in cell membranes?

a)

They are completely hydrophobic

b)

They have both hydrophilic and hydrophobic regions

c)

They are made of nucleotides

d)

They are polymers of glucose

19.

Which of the following best explains the role of hydrolysis in the digestion of proteins?

a)

It joins amino acids together

b)

It breaks peptide bonds by adding water

c)

It removes water to form peptide bonds

d)

It forms disulfide bridges

20.

Which of the following is a correct match between a biomolecule and an example?

a)

Carbohydrate - cholesterol

b)

Lipid - triglyceride

c)

Protein - cellulose

d)

Nucleic acid - insulin

21.

A student is given a sample and told it contains carbon, hydrogen, oxygen, and nitrogen, but no phosphorus. Which biomolecule could it be?

a)

Nucleic acid

b)

Protein

c)

Lipid

d)

Carbohydrate

22.

A mutation causes a change in the primary structure of a protein. Which levels of protein structure could be affected as a result?

a)

Only primary

b)

Primary and secondary

c)

All levels (primary, secondary, tertiary, quaternary)

d)

Only tertiary and quaternary

23.

Given the following sequence: adenine, ribose, phosphate group, which type of nucleic acid is this nucleotide most likely a part of?

a)

DNA

b)

RNA

c)

Protein

d)

Lipid

24.

A food contains molecules with long hydrocarbon chains and a carboxyl group at one end. Which type of biomolecule is this?

a)

Protein

b)

Nucleic acid

c)

Fatty acid (lipid)

d)

Carbohydrate

25.

If a cell needs to quickly access energy, which biomolecule will it most likely break down first?

a)

Lipid

b)

Protein

c)

Carbohydrate

d)

Nucleic acid

26.

A scientist discovers a molecule with the formula C6H12O6C_{6}H_{12}O_{6} . Which class of biomolecule does this most likely belong to?

a)

Protein

b)

Carbohydrate

c)

Lipid

d)

Nucleic acid

27.

A mutation changes a single base in a DNA sequence from adenine to guanine. What is the most direct effect of this change?

a)

The primary structure of a protein may change

b)

The secondary structure of a protein will change

c)

The lipid composition of the cell will change

d)

The carbohydrate content of the cell will increase

28.

A student adds water to a disaccharide and observes the formation of two monosaccharides. What type of reaction has occurred?

a)

Dehydration synthesis

b)

Hydrolysis

c)

Polymerization

d)

Denaturation

29.

Which of the following best explains why phospholipids form bilayers in water?

a)

Their hydrophobic tails avoid water while hydrophilic heads interact with water

b)

They are completely hydrophobic

c)

They are made of amino acids

d)

They are polymers of glucose

30.

A researcher finds a molecule that contains carbon, hydrogen, oxygen, nitrogen, and phosphorus. Which biomolecule could this be?

a)

Carbohydrate

b)

Lipid

c)

Protein

d)

Nucleic acid

31.
Carbon, Hydrogen, Oxygen and Nitrogen are elements in what biomolecule?
a)
Carbohydrate
b)
Lipid
c)
Protein
d)
Nucleic acid
32.

The process illustrated in the figure is called:

a)

condensation

b)

protein synthesis

c)

hydrolysis

d)

dehydration synthesis

33.

Which of the following shows the 3 parts of a nucleotide of a DNA molecule?

a)

Phosphate, ribose, adenine

b)

Phosphate, amino acid, thymine

c)

Phosphate, deoxyribose, guanine

d)

Phosphate, ribose, valine

34.

What type of bond links amino acids together in a protein?

a)

Peptide bond

b)

Glycosidic bond

c)

Ester bond

d)

Phosphodiester bond

35.

Which of the following best describes the function of cellulose in plants?

a)

Enzyme catalysis

b)

Structural support

c)

Energy storage

d)

Genetic information transfer

36.

Label the image with the best word.

a)

Fatty acid

b)

Nucleotide

c)

Amino acid

d)

Glucose

e)

Protein

37.
ALL polymers (large molecules) are made up of...
a)
monosaccharides
b)
monomers
c)
proteins
d)
None of these
38.
Fats and oils are composed of what two groups of molecules?
a)
 glucose and fructose 
b)
starch and sugar 
c)
water and cellulose
d)
fatty acids and glycerol 
39.
Nucleotides are monomer for
a)
Nucleic Acids
b)
Proteins
c)
Carbohydrates
d)
Lipids
40.
Which of the following best compares the structures of lipids and carbohydrates?
a)
both are made of monosaccharide monomers but lipids are hydrophobic and carbohydrates are hydrophilic
b)
both consist of carbon hydrogen and oxygen, but carbohydrates have repeating structural units and lipids do not
c)
both contain carbon and hydrogen, but carbohydrates also contain oxygen while lipids contain nitrogen
d)
both have a carbon backbone, but lipids have an amino group and carbohydrates have a carboxylic acid group
41.

What part of amino acid varies from one amino acid to the next?

a)

Amino Group

b)

Carbon Group

c)

Carboxylic Group

d)

R Group

42.

Which of the following does not correctly match the biomolecule with its monomer (building block)?

a)

Protein: is made up of amino acids

b)

Nucleic acid: is made up of amino acids

c)

Nucleic acid: is made up of nucleotides

d)

Carbohydrate: is made up of monosaccharides

43.
Amino acid is to protein as
a)
fat is to lipid
b)
DNA is to RNA
c)
sugar is to fat
d)
simple sugar is to starch
44.
In organisms, macromolecules are made up of subunits. Which of these pairs correctly describes
how a macromolecule is constructed?
a)
DNA is made up of nucleic acids.
b)
Protein is made up of amino acids.
c)
Nucleic acids are made up of DNA.
d)
Amino acids are made up of protein.
45.

What does "structure= function" mean?

a)

The shape of something will determine its job, or what it can do

b)

A building will tell you what you need to graph in your calculator

c)

The shape of something will determine what it is made of

46.

Which of the following biomolecules typically contains both nitrogen and phosphate?

a)

Lipid

b)

Protein

c)

Nucleic Acid

d)

Carbohydrate

47.
Identify the biomolecule
a)
Carbohydrate
b)
Lipid
c)
Protein
d)
Nucleic Acid
48.
The reaction used to digest and break the bond in red is:
a)
Hydrolysis
b)
Dehydration Synthesis
c)
Oxidation
d)
Single Displacement
49.
Name this biomolecule
a)
carbohydrate
b)
lipid
c)
nucleic acid
d)
protein
50.
Identify the biomolecule
a)
Nucleic Acid
b)
Protein
c)
Lipid
d)
Carbohydrate
51.
Identify the biomolecule
a)
Protein
b)
Lipid
c)
Carbohydrate
d)
Nucleic Acid
52.

Which macromolecule is composed of Carbon, Hydrogen, Oxygen, Nitrogen, and Phosphorus

a)

carbohydrates

b)

lipids

c)

nucleic acids

d)

proteins

53.
How does RNA differ from DNA?
a)
RNA contains uracil and deoxyribose
b)
RNA contains ribose and thymine
c)
RNA contains uracil and ribose
d)
RNA contains adenine and ribose
54.
a)

Primary Structure

b)

Secondary Structure

c)

Tertiary structure

d)

Quaternary Structure

55.

Sequence of amino acids

a)

Primary Structure

b)

Secondary Structure

c)

Tertiary structure

d)

Quaternary Structure

56.

Regions stabilized by hydrogen bonds between atoms of the polypeptide backbone

a)

Primary Structure

b)

Secondary Structure

c)

Tertiary structure

d)

Quaternary Structure

57.

Regions stabilized by hydrogen bonds between atoms of the polypeptide backbone

a)

Primary Structure

b)

Secondary Structure

c)

Tertiary structure

d)

Quaternary Structure

58.

Three-dimensional shape stabilized by interactions between side chains

a)

Primary Structure

b)

Secondary Structure

c)

Tertiary structure

d)

Quaternary Structure

59.

Hydrophobic interaction. As a polypeptide folds into its functional shape, amino acids with hydrophobic (nonpolar) side chains usually end up in clusters at the core of the protein, out of contact with water.

a)

Primary Structure

b)

Secondary Structure

c)

Tertiary structure

d)

Quaternary Structure

60.

Covalent bonds called disulfide bridges may further reinforce the shape of a protein. Disulfide bridges form where two cysteine monomers, which have sulfhydryl groups (¬SH) on their side chains, are brought close together by the folding of the protein.

a)

Primary Structure

b)

Secondary Structure

c)

Tertiary structure

d)

Quaternary Structure

61.
a)

Primary Structure

b)

Secondary Structure

c)

Tertiary structure

d)

Quaternary Structure

62.

Association of two or more polypeptides

a)

Primary Structure

b)

Secondary Structure

c)

Tertiary structure

d)

Quaternary Structure

63.

Overall protein structure that results from the aggregation of two or more polypeptide subunits.

a)

Primary Structure

b)

Secondary Structure

c)

Tertiary structure

d)

Quaternary Structure

64.
a)

Primary Structure

b)

Secondary Structure

c)

Tertiary structure

d)

Quaternary Structure

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