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GB1 Finals Reviewer

Total questions: 70

Worksheet time: 51mins

Name
Class
Date
1.
Which biomolecule is important source of energy for humans; glucose for human cells, tissues, and organs; provides fiber, sugar, and starches; provides structural support, cell wall, and cell membrane maker?
a)
Nucleic Acid
b)
Lipid
c)
Carbohydrate
d)
Protein
2.
Identify the biomolecule
a)
Lipid
b)
Protein
c)
Carbohydrate
d)
Nucleic Acid
3.

These are the essential in every living thing on Earth to survive. They are essential sources of energy, the means in storing energy, and also for the instructions for the cell functions. They are the ingredients for life.

a)

Atoms

b)

Biomolecules

c)

DNA

d)

Molecules

4.

Monosaccharide are the building blocks of these biomolecules.

a)

CARBOHYDRATES

b)

PROTEINS

c)

LIPIDS (fats)

d)

NUCLEIC ACID

5.

Based on the graph, which of the following could be used to increase the reaction rate beyond point C?

a)

Increase the amount of substrate

b)

Add more water

c)

Increase the temperature

d)

Increase enzyme concentration

6.

According to the induced fit hypothesis of enzyme catalysis, which of the following is CORRECT?

a)

The binding of the substrate slightly changes the shape of the enzyme’s active site

b)

The binding of the substrate depends on the shape of the active site

c)

Some enzymes change their structure when activators bind to the enzyme

d)

A competitive inhibitor can outcompete the substrate for the active site

7.

Which of the following statements regarding enzyme is TRUE

a)

Enzyme decreases the free energy change of a reaction

b)

Enzyme changes the direction of chemical reaction

c)

Enzyme increase rate of reaction

d)

Enzyme prevents changes in substrate concentration

8.
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 .
9.
An enzyme speeds up a reaction by
a)
lowering the activation energy.
b)
raising the activation energy.
c)
releasing energy.
d)
absorbing energy.
10.

Some people cannot digest milk products because they lack a specific enzyme. Which enzyme would be used to break down the lactose in milk?

a)

hydroxylase

b)

maltase

c)

peroxisomes

d)

lactase

11.

How is ADP converted back to ATP?

a)

Phosphate group is removed.

b)

Phosphate group is added.

12.
When a piece of liver is dropped into hydrogen peroxide, the peroxide bubbles vigorously as the hydrogen peroxide (H2O2) decomposes into water (H2O) and oxygen (O2). This rapid change in reaction rate suggests 
a)
that liver contains lots of germs
b)
 the liver contains an enzyme that breaks down hydrogen peroxide
c)
 that liver is a substrate for hydrogen peroxide
d)
that hydrogen peroxide is a powerful enzyme
13.
Letter B...
a)
active site
b)
enzyme
c)
substrate
d)
products
14.
Which of these is most likely an enzyme?  
a)
Sucrose
b)
Galactose
c)
Fructose
d)
Amylase
15.
Letter D...
a)
active site
b)
enzyme
c)
substrate
d)
products
16.
What happens when enzymes are heated to a high temperature?
a)
The enzymes die.
b)
The shapes of the enzyme are altered or denatured
c)
The enzymes' amino acid sequence changes.
d)
The enzymes remain the same
17.

Enzymes are considered to be

a)

Lipids

b)

Carbohydrate

c)

Protein

18.
The graph shows how the activity of an enzyme changes over a range of pH values. Which of the following conclusions can be drawn from this graph?
a)
pepsin works best at a pH near 2
b)
pepsin works best at a pH of 9
19.
The molecule in the diagram plays what role in the body?
a)
Releasing Energy
b)
Forming part of the sugar-phosphate backbone of DNA
c)
Storing Fat
d)
Controlling blood glucose levels
20.
This diagram shows the molecular structure of glucose.

Simple sugars like glucose can be used to make larger organic molecules. Identify a larger molecule made from simple sugars.
a)
Carbohydrates
b)
Lipids
c)
Monosaccharides
d)
Amino Acids
21.
Which of the following answers links a biomolecule with one of its proper functions?
a)
Lipids - Store genetic information
b)
Carbohydrates - short term energy storage
c)
Nucleic Acids - Catalyze reactions
d)
Proteins - long term energy storage
22.
Lipids are made up of which of the following?
a)
glycerol and fatty acids tails
b)
glycerol and monolipids
c)
fatty acids and phosolipids
d)
amino acids and nucleotides
23.
What elements are common to all 4 biomolecules?
a)
Carbon, hydrogen, nitrogen
b)
Carbon, Nitrogen, Phosphorus
c)
Carbon, Hydrogen, Oxygen
d)
Carbon, Hydrogen, Phosphorus
24.
Carbon, Hydrogen, Oxygen and Nitrogen are elements in what biomolecule?
a)
Carbohydrate
b)
Lipid
c)
Protein
d)
Nucleic acid
25.

Which biomolecules act as energy storage for the cell and also cushions and insulates organs?

a)

Carbohyrdates

b)

Lipids

c)

Proteins

d)

Nucleic Acids

26.

Glycerol and fatty acids are the monomers of _________.

a)

Lipids

b)

Carbohydrates

c)

Proteins

d)

Nucleic Acids

27.

Just under an orca's skin lies a thick layer of blubber. Blubber helps insulate a whale from heat loss. Based on this information, which biomolecule is blubber primarily made of?

a)

Lipids

b)

Nucleic Acids

c)

Proteins

d)

Carbohydrates

28.

The monomer of carbohydrates is known as _______.

a)

Amino Acid

b)

Fatty Acid

c)

Nucleotide

d)

Saccharide

29.

Amino Acids are the monomers of __________.

a)

Nucleic Acids

b)

Proteins

c)

Carbohydrates

d)

Lipids

30.

Which biomolecules provide quick energy for the cell and also provide materials to build the cell membrane/wall?

a)

Carbohydrates

b)

Proteins

c)

Lipids

d)

Nucleic Acids

31.

Which biomolecules transport oxygen and other substances and also form part of most organelles?

a)

Lipids

b)

Carbohydrates

c)

Proteins

d)

Nucleic Acids

32.
How do competitive inhibitors affect enzymes?
a)
It binds to the active site, blocking the substrate
b)
It changes the shape of the enzyme
c)
It increases the activation energy
d)
It decreases the activation energy
33.

The graph shows the rate of reaction of two enzymes, A and B, at different pH levels.


Which of the following can be concluded? Tick all that apply.

a)

Optimum pH of enzyme A is 2.

b)

Optimum pH of enzyme B is 8.

c)

Enzyme A only works in a basic solution

d)

At optimum pH, enzyme B is more efficient than enzyme A.

34.
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.
35.

Based on the graph, what is the optimal temperature for this enzyme?

a)

15oC

b)

40oC

c)

30oC

d)

48oC

36.

Why does enzyme activity decline at high temperatures?

a)

denaturation

b)

decreased kinetic motion

c)

increase H-bonding

d)

active sites become full

37.

Which explains the shape of the graph?

a)

active sites malfunction as more substrates are added

b)

active sites denature as more substrates are added

c)

active sites become full as more substrates are added

d)

active sites collide less as more substrates are added

38.

During the enzyme liver lab, you tested the enzymatic activity of catalase before & after it was boiled. What was the result of that lab?

a)

the raw liver reacted with the hydrogen peroxide; the boiled liver did not react

b)

the enzyme died

c)

the raw liver did not react with the hydrogen peroxide; the boiled liver did react

d)

the chemicals in the raw liver activated after it was boiled, which caused it to react with the hydrogen peroxide

39.

During the enzyme liver lab, what was the difference between the raw liver and boiled liver?

a)

Boiled liver was activated by the high temperature, which helped it react with oxygen.

b)

Boiled liver contained active catalase that reacted with H2O2. Raw liver contained denatured catalase that did not react with H2O2.

c)

Raw liver contained active catalase that reacted with H2O2. Boiled liver contained denatured catalase that did not react with H2O2.

d)

Raw liver had undamaged chemicals that helped it activate in water.

40.

What does "denature" or "denaturation" mean?

a)

When you expose a protein to high heat or pH. The protein gets broken down and changes its shape.

b)

When carbohydrates in your body die

c)

When you use high heat or pH to active chemicals within your body. This increases how much energy you need for chemicals reactions.

d)

When you breakdown carbohydrates into their simple sugars

41.

What is Amylase?

a)

enzyme found in pineapples

b)

enzyme found in saliva

c)

enzyme found in liver & other meats

42.

What is Catalase?

a)

enzyme found in pineapples

b)

enzyme found in saliva

c)

enzyme found in liver & other meats

43.

What is the function of enzymes? (what do they do for your body?)

a)

All these responses are correct

b)

they build up molecules quickly & use less energy in the process

c)

they break down molecules quickly & use less energy in the process

d)

they speed up reactions, making them occur fast enough to support life

44.

During a biology class, Henry, Liam, and Grace were discussing about different substances. They came across Sucrose, Galactose, Fructose, and Amylase. Liam wondered which of these is most likely an enzyme. Can you help them?

a)

Sucrose

b)

Galactose

c)

Fructose

d)

Amylase

45.

During a science experiment, Arjun, Jackson, and Mason heated some enzymes to a temperature beyond their range of tolerance. What happens to these enzymes?

a)

The enzymes die.

b)

The shapes of the enzyme are altered and denature

c)

The enzymes' amino acid sequence changes.

d)

The enzymes remain the same

46.

Ava, Mason, and Jackson are having a debate. Ava says enzymes are only found in the digestive system, Mason believes they are in animals but not in plants, and Jackson argues they are in all living cells. Who is correct?

a)

Ava who says enzymes are only found in the digestive system

b)

Mason who believes enzymes are in animals but not in plants

c)

Jackson who argues enzymes are in all living cells

d)

None of them

47.

Rohan, Elijah, and Oliver are conducting a science experiment in their school lab. They are testing different enzymes in various solutions. They want to know which enzyme would be most efficient in an acidic solution. Can you help them?

a)

Enzyme A

b)

Enzyme B

48.

Imagine Jackson, William, and Abigail are studying enzymes in their biology class. They learned that the Enzyme Substrate Complex is often referred to as a ​ (a)   reaction. In this analogy, the lock is the ​ (b)   and the key is the ​ (c)   . The key hole would then be the ​ (d)   . They also learned that these enzymatic reactions are sensitive to changes in their environment that are outside of their range of tolerance and the enzyme will ​ (e)   .

Choose from the below words

Lock & Key

enzyme

substrate

active site

denature

acid

base

pH

product

continue to work

49.

____ carbohydrate is found in exo sc.c. keleton of insects

a)

a. Chitin

b)

b. Peptidoglycan

c)

c. Pectin

d)

d. Inulin

50.

An unique carbohydrate found in bacterial cell wall is _____

a)

a. Peptidoglycan

b)

b. Pectin

c)

c. Cellulose

d)

d. All of the above

51.

The most abundant polysaccharide on Earth is ______

a)

a. Cellulose

b)

b. Starch

c)

c. Pectin

d)

d. Glycogen

52.

The digestion of sucrose (table sugar) results in what two monosaccharides?

a)

a. Glucose and galactose

b)

b.

Maltose and glucose

c)

c. Fructose and glucose

d)

d. Galactose and fructose

53.

Which of these best represents a fatty-acid molecule?

a)
b)
c)
d)
54.

In red blood cells, the compound carbonic anhydrase increases the rate at which carbon dioxide is converted to bicarbonate ions for transport in the blood. In red blood cells, carbonic anhydrase acts as which of the following?

a)

an enzyme

b)

a hormone

c)

a lipid

d)

a sugar

55.

Some bacteria contain a substance called nitrogenase. Nitrogenase catalyzes the chemical reaction that converts atmospheric nitrogen (N2) into ammonia (NH3). Nitrogenase is an example of which of the following?

a)

a sugar

b)

an enzyme

c)

a nucleotide

d)

an amino acid

56.

The diagram shows how lactase can be immobilized to modify milk. What is the purpose of this set-up? Tick all that apply.

a)

hydrolyse the lactose into glucose and galactose

b)

produce lactose-free milk

c)

help prevent the product from being contaminated

d)

make lactase less stable

e)

keep the enzyme for future use

57.

Watch the animation and identify the hypothesis involved

a)

Lock and Key hypothesis

b)

Induced Fit hypothesis

c)

Enzyme-Substrate hypothesis

58.
Use the diagram to answer the question. Between which parts of the molecule must the bonds be broken to form an ADP molecule?
a)
A and B
b)
A and C
c)
B and C
d)
C and D
59.
Succinate dehydrogenase catalyzes the conversion of succinate to fumarate. The reaction is inhibited by malonic acid, which resembles succinate but cannot be acted upon by succinate dehydrogenase. Increasing the ratio of succinate to malonic acid reduces the inhibitory effect of malonic acid. What is malonic acid's role with respect to succinate dehydrogenase?
a)
It is a competitive inhibitor.
b)
It is an allosteric regulator.
c)
It is able to bind to succinate.
d)
It blocks the binding of fumarate.
60.

Explain the graph

a)

Enzymes are denatured

b)

Enzyme's active site are fully occupied with substrate

c)

Active site of enzyme is no longer complementary with substrate

d)

The rate of reaction increases with increasing substrate concentration

61.

_________ is the minimum amount of energy required to start a chemical reaction

a)

Substrate

b)

Products

c)

Activation energy

d)

Enzyme

62.

The diagram represents the activation energy for an enzyme catalyzed and an uncatalyzed reaction. The activation energy for an enzyme-catalyzed reaction is represented by the region labelled

a)

I

b)

II

c)

III

d)

IV

63.

The graph shows the relationship between enzyme concentration and the rate of an enzyme catalyzed reaction. Which of the following statements BEST describes the rate of an enzyme catalyzed reaction?

a)

The rate is directly proportional to the enzyme concentration

b)

The rate is inversely proportional to the enzyme concentration

c)

The rate had reached equilibrium

d)

The rate is affected by the enzyme concentration

64.

Which of the following diagrams BEST illustrates the effect of temperature on the rate of an enzyme catalyzed reaction?

a)

A

b)

B

c)

C

d)

D

65.

Select the correct options.

In non-competitive inhibition,

a)

the inhibitor binds to the active site

b)

the inhibiter binds to the allosteric site

c)

the enzyme active site changes shape

d)

substrate shape changes shape to prevent binding

e)

no reaction takes place

66.

Which of the following graphs represents the effect of pH on rate of reaction?

a)

A

b)

A and B

c)

C

d)

B and D

e)

D

67.

Select the correct options.

Cell metabolism:

a)

includes all reactions in a cell

b)

regulates cellular energy

c)

exists through metabolic pathways

d)

serves to increase energy release through fewer steps

68.

What does ATP stand for?

a)

Adenosine Biphosphate

b)

Adenosine Triphosphate

c)

Adenosine Tetraphosphate

d)

Adenosine Monophosphate

69.

What happens to ATP during the ATP-ADP cycle?

a)

ATP is converted into ADP and exothermic energy after a catabolic reaction.

b)

ATP is converted into ADP and endothermic energy after a catabolic reaction.

c)

ATP is converted into ADP and exothermic energy after a anabolic reaction.

d)

ADP is converted into ATP and exothermic energy after a catabolic reaction.

70.

Accurately label the events and parts of the cycle shown,

a)

Energy is used

b)

ADP

c)

Phosphate from food added

d)

Energy released

e)

3rd phosphate broken off

f)

ATP

1
2
3
4
5
6
1)
2)
3)
4)
5)
6)

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