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IB Bio B1.1 Carbohydrates and Lipids / B1.2 Proteins Quiz

Total questions: 46

Worksheet time: 23mins

Name
Class
Date
1.

What is the basic unit of carbohydrates?

a)

lipid

b)

disaccharide

c)

monosaccharide

d)

polysaccharide

2.

Which type of lipid is composed of three fatty acids and a glycerol molecule?

a)

Monosaccharides

b)

Triglycerides

c)

Phospholipids

d)

Steroids

3.

What are the building blocks of proteins?

a)

Glucose

b)

Amino acids

c)

Nucleotides

d)

Fatty acids

4.

Give an example of a polysaccharide.

a)

Cellulose

b)

Glucose

c)

Protein

d)

Starch

5.

What is the primary structure of a protein?

a)

Network of sugars and proteins

b)

Sequence of amino acids

c)

Arrangement of nucleic acids

d)

Combination of lipids and carbohydrates

6.

What is the main function of monosaccharides in living organisms?

a)

Supporting cell structure

b)

Regulating body temperature

c)

Aiding in muscle contraction

d)

Provide energy

7.

What are the characteristics of saturated fats?

a)

Solid at room temperature, mainly from animal sources, linked to increased risk of heart disease

b)

Liquid at room temperature, mainly from animal sources, linked to increased risk of heart disease

c)

Solid at room temperature, mainly from plant sources, linked to increased risk of heart disease

d)

Liquid at room temperature, mainly from plant sources, linked to decreased risk of heart disease

8.

What are the essential amino acids?

a)

Carbohydrates and fats

b)

Vitamins and minerals

c)

Amino acids that can not be synthesized by the body

d)

Non-essential amino acids

9.

What is the role of proteins in the body?

a)

Proteins have no role in the body

b)

Proteins provide structure, regulate processes, and serve as enzymes and hormones in the body.

c)

Proteins are only used for building muscles

d)

Proteins are only found in the skin and hair

10.

What is the structure of cellulose?

a)

Spherical polymer composed of fructose molecules

b)

Branched polymer composed of sucrose molecules

c)

Planar polymer composed of maltose molecules

d)

Linear polymer composed of glucose molecules

11.
Which of the following is not a monosaccharide?
a)
Glucose
b)
Fructose
c)
Sucrose
d)
Galactose
12.
What type of linkage joins monosaccharides in a polysaccharide?
a)
Peptide bond
b)
Ester bond
c)
Glycosidic bond
d)
Hydrogen bond
13.
Which of the following is a function of carbohydrates in the human body?
a)
Energy storage
b)
Structure and support
c)
Cell recognition
d)
All of the above
14.
Which of the following is a characteristic of saturated fatty acids?
a)
They contain double bonds
b)
They are typically liquid at room temperature
c)
They are commonly found in plant oils
d)
They have no double bonds between carbon atoms
15.
Phospholipids are a major component of:
a)
Cell membranes
b)
DNA
c)
Ribosomes
d)
Mitochondria
16.
What function do steroids perform in the human body?
a)
Energy storage
b)
Cell signaling
c)
Enzyme catalysis
d)
Structure and support
17.
The primary structure of a protein is determined by:
a)
Hydrogen bonding
b)
Peptide bonds
c)
Disulfide bridges
d)
Van der Waals interactions
18.
Which of the following is not a function of proteins?
a)
Enzyme catalysis
b)
Transport of molecules
c)
Energy storage
d)
Cell signaling
19.
What level of protein structure is determined by the sequence of amino acids?
a)
Primary structure
b)
Secondary structure
c)
Tertiary structure
d)
Quaternary structure
20.
Which polysaccharide is used for energy storage in plants?
a)
Starch
b)
Cellulose
c)
Glycogen
d)
Chitin
21.
The breakdown of glycogen into glucose is known as:
a)
Glycolysis
b)
Gluconeogenesis
c)
Glycogenolysis
d)
Glycosidation
22.
What is the main function of cellulose in plant cell walls?
a)
Energy storage
b)
Structural support
c)
Enzyme catalysis
d)
Cell signaling
23.
Unsaturated fatty acids contain:
a)
Only single bonds between carbon atoms
b)
At least one double bond between carbon atoms
c)
No carbon atoms
d)
Both A and B
24.
Which lipid acts as an insulator in animals?
a)
Triglycerides
b)
Phospholipids
c)
Adipose tissue
d)
Waxes
25.
What are the building blocks of a triglyceride?
a)
Amino acids
b)
Fatty acids and glycerol
c)
Monosaccharides
d)
Nucleotides
26.
What type of bond is formed between two cysteine amino acids in a protein?
a)
Peptide bond
b)
Disulfide bridge
c)
Hydrogen bond
d)
Ionic bond
27.
The secondary structure of a protein is stabilized by:
a)
Hydrogen bonds
b)
Peptide bonds
c)
Disulfide bridges
d)
Van der Waals interactions
28.
Denaturation of a protein leads to:
a)
Loss of primary structure
b)
Loss of secondary structure
c)
Loss of tertiary structure
d)
Both B and C
29.
Which of the following is a disaccharide?
a)
Glucose
b)
Maltose
c)
Starch
d)
Cellulose
30.
Which of the following is a function of cholesterol in the body?
a)
Energy storage
b)
Cell membrane structure
c)
Hormone synthesis
d)
Antibody production
31.
Lipids are insoluble in:
a)
Water
b)
Carbon dioxide
c)
Oxygen
d)
Hydrochloric acid
32.
Which of the following is a function of waxes in organisms?
a)
Waterproofing
b)
Energy storage
c)
Enzyme catalysis
d)
Cell signaling
33.
The process of protein synthesis occurs in the:
a)
Ribosome
b)
Nucleus
c)
Mitochondria
d)
Endoplasmic reticulum
34.
Which of the following is a function of adipose tissue in the body?
a)
Energy storage
b)
Blood clotting
c)
Muscle contraction
d)
Nerve impulse transmission
35.
What is the primary function of phospholipids in cell membranes?
a)
Energy storage
b)
Structural support
c)
Selective permeability
d)
Enzyme catalysis
36.
Which of the following is an example of a fibrous protein?
a)
Insulin
b)
Hemoglobin
c)
Collagen
d)
Enzyme
37.
Which lipid is the precursor for the synthesis of steroid hormones?
a)
Triglycerides
b)
Phospholipids
c)
Cholesterol
d)
Waxes
38.
Which of the following is a function of glycogen in the human body?
a)
Structural support
b)
Energy storage in liver and muscles
c)
Cell signaling
d)
Hormone synthesis
39.
Lipids are classified as hydrophobic molecules because they:
a)
Dissolve in water
b)
Are repelled by water
c)
Have a high water content
d)
Form hydrogen bonds with water
40.
The sequence of amino acids in a protein is determined by:
a)
DNA replication
b)
RNA transcription
c)
Protein folding
d)
Genetic code in mRNA
41.
Which of the following is an example of a quaternary protein structure?
a)
Hemoglobin
b)
Collagen
c)
Insulin
d)
Myoglobin
42.
Which molecules are produced during the hydrolysis of a triglyceride molecule?
a)
Water and glycerol
b)
Fatty acids and glycerol
c)
Water and fatty acids
d)
Water and lipids
43.
What feature of carbon makes it most suitable as a basis for life?
a)
Its abundance in nature
b)
Its bonding properties
c)
Its reactivity to light
d)
Its presence in the early atmosphere of the Earth
44.
In which processes are macromolecules broken down into monomers?
a)
Anabolism and catabolism
b)
Catabolism and hydrolysis
c)
Hydrolysis and reduction
d)
Reduction and anabolism
45.
Glucose is absorbed through protein channels in the plasma membrane of epithelium cells in the small intestine. Which characteristics of glucose prevent its diffusion through the phospholipid bilayer?
a)
It is non-polar and therefore hydrophobic.
b)
Its hydrogen bonds link with amino acids in the protein channel.
c)
It is polar and therefore hydrophilic.
d)
Its covalent bonds interact with the phospholipids.
46.
Lipids are more efficient energy stores than carbohydrates. What is the reason for this?
a)
Lipids are bigger molecules than carbohydrates.
b)
Lipids release more energy per gram than carbohydrates.
c)
Lipids can be more easily mobilized than carbohydrates when needed.
d)
Lipids can be used in aerobic and anaerobic respiration when needed.

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