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Biomolecules RECAP

Total questions: 91

Worksheet time: 1hrs 8mins

Name
Class
Date
1.

Which of these inorganic ions is found in Haemoglobin

a)

Magnesium

b)

Iron

c)

Nitrate

d)

Phosphate

2.

What type of bond joins Hydrogen atoms to Oxygen atoms within a molecule of water

a)

Covalent

b)

Ionic

c)

Hydrogen

d)

Disulphide

3.

What type of bond joins two monosaccharides together to form a disaccharide?

a)

Glucosidic

b)

Glycosidic

c)

Ester

d)

Estree

4.

Which form of glucose is this

a)

Alpha

b)

Beta

5.

All four biomolecules are based on Carbon.

a)

TRUE

b)

FALSE

6.

The term "Disaccharides" means

a)

sugar that contains one glucose

b)

Sugar that contains two glucose

c)

Sugar that contains more than two glucose.

7.

Ribose is the pentose sugar present in _________________

a)

DNA

b)

RNA

8.
7.
a)
A
b)
B
c)
C
d)
D
9.

What is true about ionic bonds compared to covalent bonds?

a)

Ionic bonds are stronger

b)

Ionic bonds are weaker

c)

Ionic bonds are the same strength

d)

Ionic bonds do not exist.

10.

Which process is associated with the release of water?

a)

Hydrolysis

b)

Condensation

c)

Photosynthesis

d)

Respiration

11.

What happens to the polymer chain in a hydrolysis reaction?

a)

It becomes longer

b)

It becomes shorter

c)

It remains the same

d)

It forms a new bond.

12.

Lactose is formed from which two monosaccharides?

a)

Glucose and Fructose

b)

Glucose and Galactose

c)

Fructose and Galactose

d)

Glucose and Glucose

13.

What is the main storage molecule in plants?

a)

Cellulose

b)

Starch

c)

Glucose

d)

Protein

14.

Select all types of molecule which are used as energy store molecules

a)

starch

b)

glycogen

c)

cellulose

d)

glucose

15.

Glycogen is an example of

a)

a fat

b)

a protein

c)

a complex carbohydrate

d)

a simple sugar

16.

This is a section of which molecule?

a)

Amylopectin

b)

Amylose

c)

Cellulose

d)

Glycogen

17.
This is a section of which molecule?
a)
Amylose
b)
Amylopectin
c)
Cellulose
18.

It consists of two glucose monomers

a)

maltose

b)

sucrose

c)

lactose

d)

cellulose

19.

The illustration shows...

a)

alpha-glucose

b)

beta-glucose

c)

fructose

d)

maltose

20.

Alpha-glucose differ from its beta isomer in position of:

a)

OH group at carbon 1

b)

OH group at carbon 4

c)

lack of O at carbon 3

d)

OH group at carbon 2

21.

Tick the subunits of starch:

a)

amylose

b)

amylopectin

c)

cellulose

d)

lactose

e)

maltose

22.

The disaccharide lactose is made from which of the following?

a)

glucose

b)

fructose

c)

galactose

d)

maltose

23.

Calculate the pH of a solution that has the hydrogen ion concentration of

2.75 × 10–4 M. Use the formula pH = −log10[H+].

a)

pH 2.56

b)

pH 4.44

c)

pH 3.5

d)

pH 3.56

24.

Which of these are known as "macromolecules" (large molecules)

a)

fatty acids

b)

glycerol

c)

protein

d)

lipids

e)

carbohydrates

25.

What are the monomers of proteins called?

a)

Monosaccharides

b)

Fatty acids

c)

Amino acids

d)

Nucleotides

26.

6. The monomer of carbohydrates is known as _______.

a)

Amino Acid

b)

Fatty Acid

c)

Nucleotide

d)

Saccharide

27.

7. Glycerol and fatty acids are the monomers of _________.

a)

Lipids

b)

Carbohydrates

c)

Proteins

d)

Nucleic Acids

28.

1. The four most common elements found in biomolecules are __________.

a)

Sulfur, Phosphorus, Carbon, Oxygen

b)

Carbon, Oxygen, Nitrogen, Hydrogen

c)

Sulfur, Nitrogen, Carbon, Iron

d)

Carbon, Nitrogen, Hydrogen, Sulfur

29.

Enzymes are an example of

a)

Lipids

b)

Carbohydrate

c)

Protein

d)

Nucleic Acid

30.
Each enzyme only has 1 substrate that will fit its active site.  What is this called?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
31.
What 3 letters do enzymes typically end in?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
32.
Any substance that is acted upon by an enzyme is called a(n)?
a)
Coenzyme
b)
Substrate
c)
Vitamin
d)
Polypeptide
33.
After the enzyme and substrate bind together and perform the reaction, what does the substrate become?
a)
a substrate
b)
an enzyme
c)
a product
d)
an active site
34.
In the diagram, what is letter A? 
a)
product
b)
substrate
c)
enzyme-substrate complex
d)
active site
35.
Letter C...
a)
active site
b)
enzymes
c)
substrate
d)
products
36.
Enzymes provide a site where reactants called substrates can be brought together in an enzyme-catalyzed reaction. The site is called the
a)
enzyme substrate complex.
b)
reaction site.
c)
active site.
d)
lock and key.
37.
An enzyme speeds up a reaction by
a)
lowering the activation energy.
b)
raising the activation energy.
c)
releasing energy.
d)
absorbing energy.
38.
Based on the graph, what is the optimal temperature for this enzyme? 
a)
15oC
b)
40oC
c)
30oC
d)
35oC
39.
The graph shows how enzymes affect reactions in cells. Which statement best summarizes the information shown in the graph?
a)
Enzymes increase the energy of the reactants.
b)
Enzymes decrease the energy level of the products.
c)
Enzyme decrease the activation energy of the reaction.
d)
Enzymes reverse the direction of the reaction.
40.
Which of the following conclusions can be drawn from this graph?
a)
The optimum pH of the enzyme is 6.6.
b)
The optimum pH of the enzyme is 5.8
c)
The enzyme’s activity increases as pH increases 5.0 to 9.0
d)
The enzyme’s activity is greater around pH of 8.0 .
41.
What happens when enzymes are heated to a high temperature?
a)
The enzymes die.
b)
The shapes of the enzyme are altered denature
c)
The enzymes' amino acid sequence changes.
d)
The enzymes remain the same
42.
Which enzyme is most efficient in a basic solution?
a)
A
b)
B
43.
At 40 degrees Celsius, your biological enzymes will...
a)
Functional optimally
b)
Denature
c)
Wait until the temp. increases
d)
Wait until the temp. decreases
44.

Identify the following respectively:


No inhibitor - Competitive inhibitor - Non-competitive inhibitor

a)

X - Y - Z

b)

X - Z - Y

c)

Y - X - Z

d)

Z - X - Y

45.

The graph shows the progress of an enzyme - catalysed reaction with increasing temperature. The decline in the rate at X is MOST likely because

a)

peptide bonds are broken

b)

the enzyme loses its secondary nature

c)

the enzyme loses its tertiary structure

d)

the substrate concentration becomes too low

46.

Which graph shows the changes in substrate concentration during the course of an enzyme catalyzed reaction?

a)

A

b)

B

c)

C

d)

D

47.

Which of the following is the BEST example of anabolism?

a)

Glycogen is converted to glucose

b)

Peptide bonds are hydrolysed by peptidases

c)

Amino acids joined by peptide bonds to form a polypeptide

d)

Amylose and amylopectin combine to form starch molecules

48.

Which of the following tests for starch?

a)

Iodine

b)

Benedict's

c)

Biuret

d)

Emulsion

49.

When protein is present Biuret turns...

a)

purple

b)

blue-black

c)

orange

d)

brick red

50.
When large amounts of glucose is present Benedicts turns...
a)
purple
b)
blue-black
c)
brick-red
d)
green
51.

A negative test for protein will cause Biuret to stay...

a)

brick red

b)

blue

c)

black

d)

orange

52.

What is a positive result for the lipid emulsion test?

a)

milky white colour

b)

clear

c)

yellow

d)

green

53.

In this experiment, you must put your test tubes into a hot water bath

a)

Benedict's Test

b)

Biurets Test

c)

Iodine Test

d)

Ethanol Emulsion Test

54.

This photo represents a

a)

negative test for glucose

b)

negative test for protein

c)

positive test for starch

d)

positive test for glucose

55.

The test tubes in the photo represent a negative and positive result for

a)

Benedict's with glucose

b)

Biuret with protein

c)

Iodine with starch

d)

Ethanol with fat

56.
Which biomolecule does Benedict's solution test for?
a)
simple carbohydrate (monosaccharides)
b)
complex carbohydrates (polysaccharides)
c)
proteins
d)
lipids
57.
Which isomer of glucose is this?
a)
Beta glucose
b)
Alpha glucose
c)
Neither
58.
Which branch of the amino acid determines its overall function?
a)
Amino group
b)
Hydrogen atom
c)
Carboxyl Group
d)
R group
59.
What level of protein structure is this?
a)
Primary
b)
Secondary
c)
Tertiary
d)
Quaternary
60.
Carbohydrates, proteins and lipid monomers are joined in reactions called...
a)
Condensation Reactions
b)
Hydrolysis Reactions
61.

It consists of two glucose monomers

a)

maltose

b)

sucrose

c)

lactose

d)

cellulose

62.

What monomer is found in cellulose but not in starch?

a)

amylose

b)

β-glucose

c)

α-glucose

d)

amylopectin

63.

Which tests for the presence of reducing sugars?

a)

Iodine

b)

Biuret

c)

Benedict's

d)

Emulsion

64.

To test for non-reducing sugars, you must first hydrolyse your sample using....

a)

Strong alkali

b)

Universal indicator

c)

Strong acid

d)

Heat

65.

Which of the following are branched? Tick all that apply.

a)

Glycogen

b)

Amylose

c)

Amylopectin

d)

Cellulose

66.

Which of the following contains cross-links due to hydrogen bonding between microfibrils?

a)

Glycogen

b)

Cellulose

c)

Starch

d)

Maltose

67.

Dipeptides and polypeptides are formed in which type of reaction?

a)

condensation reaction

b)

decomposition reaction

c)

displacement reaction

d)

hydrolysis reaction

68.

What type of bond is formed between two amino acids?

a)

ester bond

b)

glycosidic bond

c)

phosphodiester bond

d)

peptide bond

69.

Which type of bond is responsible for forming beta pleated sheets?

a)

covalent bond

b)

hydrogen bond

c)

ionic bond

d)

metallic bond

70.

In which of the following situations would a disulfide bridge form?

a)

in a polypeptide chain with two adenine amino acids close together

b)

in a polypeptide chain with two cysteine amino acids close together

c)

in a polypeptide chain with two guanine amino acids close together

d)

in a polypeptide chain with two thymine amino acids close together

71.

A disulfide bridge is an example of a...?

a)

covalent bond

b)

hydrogen bond

c)

ionic bond

d)

metallic bond

72.

Which of the following is not present in all proteins?

a)

primary structure

b)

secondary structure

c)

tertiary structure

d)

quaternary structure

73.

Lipase and protease are examples of...?

a)

antibodies

b)

enzymes

c)

structural proteins

d)

transport proteins

74.

Hydrophobic and hydrophilic amino acids are integral structures to which type of protein?

a)

antibodies

b)

enzymes

c)

structural proteins

d)

transport proteins

75.

Which feature of proteins makes them good structural molecules?

a)

cross links between polypeptide chains

b)

high solubility

c)

hydrogen bonds

d)

hydrophobic regions

76.

Which two substances are used to test for protein?

a)

sodium hydroxide solution and copper sulfate solution

b)

sodium hydroxide solution and ethanol

c)

sodium hydroxide solution and iodine solution

d)

sodium hydroxide solution and potassium iodide solution

77.
The bond that joins amino acids are called:
a)
Peptide Bonds
b)
Ester Bonds
c)
Glycosidic Linkages
d)
Phosphodiester Bonds
78.

What is another name for a protein?

a)

fat

b)

sugar

c)

amino acid

d)

polypeptide

79.
The primary sequence of a protein refers to the:
a)
Order of amino acids
b)
α-Helix or β-Pleated Sheet
c)
Interaction of subunits
d)
Hydrogen Bonding
80.
Structures like an α-Helix are formed because of:
a)
Hydrophobic Interactions
b)
DiSulphide Bridges
c)
Salt Bridges
d)
Hydrogen Bonding
81.
The structure of proteins can be changed by environmental factors such as temperature or pH.
a)
True
b)
False
82.

All of the following are functions of proteins EXCEPT

a)

catalyze/speed up chemical reactions

b)

provide quick energy

c)

make up muscles, hair, and bones

d)

support the immune system

83.

An amphoteric compound is when a _____ & ______ interact

a)

base

b)

acid

c)

neutral

d)

salt

84.

Saturated fats are __________ at room temperature.

a)

liquid

b)

solid

85.

Fatty Acids differ in there chain length and their

a)

protein carriers

b)

Side chains

c)

energy level

d)

degree of saturation

86.

What lipoprotein is responsible for transporting fat in blood?

a)

VLDL

b)

Chylomicrons

c)

HDL

d)

LDL

87.

The bonds that join fatty acids and glycerol to form triglycerides are called:

a)
Peptide Bonds
b)
Ester Bonds
c)

Glycosidic Bonds

d)
Phosphodiester Bonds
88.

What is the following molecule?

a)

glucose

b)

saturated fat

c)

unsaturated fat

d)

peptide

89.

What is the following molecule?

a)

triglyceride

b)

phospholipid

c)

steroid

d)

protein

90.

A triglyceride is made up of __ glycerol and __ fatty acids.

a)

3; 1

b)

1; 3

c)

1; 2

91.

Which of the following is a main function of a lipid?

a)

source of quick energy

b)

stores energy, insulates us, and makes up the cell membrane

c)

transport substances in and out of the cell

d)

stores genetic information

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