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Chemistry of Life

Total questions: 88

Worksheet time: 2hrs 51mins

Name
Class
Date
1.

What is a tissue?

a)

Groups of similar types of cells that work together to carry out a specific task

b)

Groups of different tissues working together to perform a particular job

c)

Groups of different organs working together to complete a series of tasks

d)

The smallest unit of life

2.

What is the order of levels of organization of the body from SMALLEST to Largest

a)

cell, organ, tissue, organ system, organism

b)

organism, organ system, organ, tissue, cell

c)

cell, organ, tissue, organ system, organism

d)

cell, tissue, organ, organ systems, organism

3.

Water is the univeral ____.

a)

solute

b)

solvent

c)

solution

4.
Large bodies of water, such as lakes and oceans, do not quickly fluctuate in temperature. What is the reason for this phenomenon?
a)
Water is an acid.
b)
Water is a versatile solvent.
c)
Water has a high heat capacity.
d)
 Water acts as a buffer.
5.

What is cohesion?

a)

The ability of a molecule to "stick" to itself

b)

The ability of a molecule to "stick" to other molecules

c)

Large amounts of energy are required to change the temperature of a substance

d)

A well-organized and efficient team

6.
Why does ice float?
a)
As water freezes, it expands and its density decreases.
b)
As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.
c)
As water freezes, air becomes trapped between the hydrogen bonds of water molecules.
d)
As water freezes, it takes up more oxygen from the atmosphere, causing it to have a greater buoyancy.
7.
Water is polar because...
a)
The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms.
b)
The molecule has two poles, at which the it is colder than other regions of the molecule.
c)
The unequal sharing of electrons gives the water molecule a slight negative charge near its hydrogen atoms and a slight positive charge near its oxygen atom.
d)
The water molecule is neutral.
8.
Which biomolecule is a main source of quick energy?
a)
Nucleic Acid
b)
Protein
c)
Lipid
d)
Carbohydrate
9.
Which biomolecule is found in fats, oils, and waxes and is a source of long-term energy? 
a)
Proteins
b)
Nucleic Acid
c)
Lipids
d)
Carbohydrate
10.
What is the function of a nucleic acid?
a)
Stores genetic information
b)
Stores energy
c)
Quick source of energy
d)
Builds structures
11.
Which biomolecule is this a picture of?
a)
Protein
b)
Nucleic Acid
c)
Lipid
d)
Carbohydrate
12.
Which biomolecule is this a picture of?
a)
Protein
b)
Nucleic Acid
c)
Lipid
d)
Carbohydrate
13.
Which biomolecule is this a picture of?
a)
Protein
b)
Nucleic Acid
c)
Lipid
d)
Carbohydrate
14.
Which biomolecule has sugars and starches?
a)
Lipids
b)
Proteins
c)
Carbohydrates
d)
Nucleic Acid
15.
What type of molecule is this?
a)
Nucleic acid
b)
Protein
c)
Carbohydrate
d)
Lipid
16.
What elements are common to all 4 biomolecules?
a)
Carbon, hydrogen, nitrogen
b)
Carbon, Nitrogen, Phosphorus
c)
Carbon, Hydrogen, Oxygen
d)
Carbon, Hydrogen, Phosphorus
17.
Enzymes are considered to be 
a)
Lipids
b)
Carbohydrate
c)
Protein
d)
Nucleic Acid
18.
Where do substrates bind on an enzyme?
a)
voltage-gated channels
b)
surface receptor
c)
calcium channels
d)
active site
19.
Enzymes are capable of increasing the rate of a chemical reaction within a living cell.  Enzymes accomplish this through which of the following means?
a)
reducing the number of products   
b)
reducing the activation energy
c)
increasing the temperature of the cell
d)
increasing the concentration of reactants 
20.
What word describes when water is attracted to other substances?
a)
cohesion
b)
adhesion
c)
capillary action
d)
surface tension
21.
Which end of the water molecule has a slightly positive charge?
a)
the oxygen end
b)
the hydrogen end
c)
both ends are slightly positive
d)
neither end is positive
22.
Which of the following is LEAST likely to dissolve in water?
a)
nonpolar fats and oils
b)
polar sugar molecules
c)
salt made of a positive sodium ion and a negative chloride ion
d)
all of the substances will dissolve easily in water
23.
The tightness across the surface of water that enables paper clips to float is ____________.
a)
adhesion
b)
capillary action
c)
surface tension
d)
polarity
24.
When water molecules stick easily to other water molecules, this is called what?
a)
cohesion
b)
adhesion
c)
solution
d)
polar molecule
25.

What characteristic is shown in the image?

a)

Polarity

b)

Hydrogen Bonds

c)

Cohesion

d)

Adhesion

26.
What is a substance called if it speeds up a chemical reaction?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
27.
With what 3 letters do enzymes typically end?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
28.
In the diagram, what is letter A? 
a)
product
b)
substrate
c)
enzyme-substrate complex
d)
active site
29.
An enzyme speeds up a reaction by
a)
lowering the activation energy.
b)
raising the activation energy.
c)
releasing energy.
d)
absorbing energy.
30.
Based on the graph, what temperature does this enzyme work best? 
a)
15 C
b)
40 C
c)
30 C
d)
47 C
31.
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.
32.
What happens to an enzyme when it is denatured?
a)
Activation energy is lowered.
b)
It becomes stronger.
c)
It loses its shape.
d)
Activation energy is raised.
33.

This organelle contains DNA and controls cellular growth and reproduction

a)

mitochondria

b)

nucleus

c)

cell wall

d)

cytoplasm

34.

Lipids/Carbohydrate provide long-term energy for cells.

a)

Lipids

b)

Carbohydrates

35.

Lipids / carbohydrates are also called fats.

a)

Lipids

b)

Carbohydrates

36.

DNA and RNA are made up of nucleotides / amino acids.

a)

nucleotides

b)

amino acids

37.

Nucleic acids / Carbohydrates provide proteins with specific instructions for cell growth and repair.

a)

Nucleic acids

b)

Carbohydrates

38.

Polymers can be broken down into other polymers / monomers.

a)

other polymers

b)

monomers

39.

How many calories are in the food label?

a)

240

b)

220

c)

0

d)

53

40.

How many grams of short-term energy does this food label contain?

a)

220

b)

46

c)

4

d)

11

41.

How many grams of lipids does this food label contain?

a)

220

b)

46

c)

4

d)

11

42.

How many grams of the biomolecule used for cell growth and repair are in the food label?

a)

220

b)

46

c)

4

d)

11

43.

Which two biomolecules are used for energy?

a)

Carbohydrates and Proteins

b)

Lipids and Carbohydrates

c)

Proteins and Lipids

d)

Nucleic Acids and Proteins

44.

Which of the following has the correct monomer matched?

a)

Protein -> Nucleotide

b)

Carbohydrate -> Monosaccharide

c)

Lipids -> Amino Acid

d)

Nucleic Acid -> Glycerol & Fatty Acid

45.

What is represented by letter A

a)

Enzyme

b)

Substrate

c)

Active Site

d)

Enzyme Substrate Complex

46.

What does an enzyme do to a chemical reaction?

a)

Speeds it up (catalyzes)

b)

Slows it down

c)

Breaks it down

47.

What happens to an enzyme after it releases the product?

a)

Enzyme is expelled from the cell.

b)

Enzyme is denatured and can no longer catalyze a reaction

c)

Enzyme is re-used and attaches to a new substrate

d)

Enzyme becomes the product

48.

 

All of the following can cause an enzyme to work less effectively EXCEPT -

a)

Concetration (amount of) substrate

b)

Temperature

c)

pH

d)

Perfect Conditions

49.

Which of the following best defines denature?

a)

An enzyme working in optimal conditions

b)

An enzyme's shape changes causing it to no longer catalyze reactions.

c)

A substrate's shape changes to match the enzyme

d)

An enzyme shape changes to match the substrate.

50.

What are the 2 factors that denature an enzyme?

a)

pH and concentration

b)

concentration and temperature

c)

temperature is the only factor

d)

pH and temperature

51.

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

a)

20

b)

40

c)

43

d)

60

52.

Based on the graph, what pH does Enzyme C work best at?

a)

1.5

b)

6

c)

8

d)

9

53.

What does an enzyme do for the activation energy?

a)

It raises it

b)

It slows it down

c)

It speeds it up

d)

It reduces it

54.

Which of the following contains the most lipid?

a)
b)
c)
d)
55.

Below are the four biomolecules, EXCEPT:

a)

Protein

b)

Lard

c)

Carbohydrates

d)

Nucleic Acid

56.

What type of biomolecule contains carbon, hydrogen, oxygen, and nitrogen?

a)

carbohydrate

b)

lipid

c)

nucleic acid

d)

protein

57.

The biomolecule that holds an organism's genetic information is called ___________.

a)

carbohydrate

b)

lipid

c)

nucleic acid

d)

protein

58.

Which of the following is the correct pair of biomolecules and their monomers?

a)

Carbohydrate: Fatty Acids

b)

Protein: Amino acid

c)

Lipid: Nucleotide

d)

Nucleic Acid: DNA

59.

The following statements are TRUE regarding lipids, EXCEPT:

a)

they store energy for later use

b)

they are insoluble in water

c)

they are composed of carbon, hydrogen, oxygen and phosphorus

d)

they can be found in fats and oils

60.

Which of the following is a monosaccharide?

a)

Chitin

b)

Sucrose

c)

Starch

d)

Glucose

61.

Cholesterol is a/an...

a)

carbohydrate

b)

lipid

c)

protein

d)

nucleic acid

62.

Enzyme is a/an...

a)

carbohydrate

b)

lipid

c)

protein

d)

nucleic acid

63.

Which of the following transfers the genetic information for the creation of proteins

from the nucleus to the ribosomes?

a)

DNA

b)

RNA

c)

nucleotide

d)

enzyme

64.

What biomolecule serves as structural materials in hair, nails and connective tissues?

a)

protein

b)

lipid

c)

carbohydrate

d)

nucleic acid

65.

Monosaccharides are the building blocks of which group of biomolecules?

a)

protein

b)

lipid

c)

carbohydrate

d)

nucleic acid

66.

The sugar in RNA is _____________while the sugar in DNA is ________.

a)

deoxyribose, ribose

b)

ribose, deoxyribose

c)

c. ribose, phosphate

d)

ribose, uracil

67.

Which of the following sugars are the components of lactose?

a)

glucose & galactose

b)

fructose and galactose

c)

glucose and glucose

d)

glucose & fructose

68.

Which of the following elements is present in Nucleic acid but not in other biomolecules?

a)

Carbon

b)

Phosphorus

c)

Nitrogen

d)

Hydrogen

69.

Are enzymes used up in chemical reactions?

a)

Yes, they can not be used again for another reaction

b)

No, they can be used again in another reaction

70.

Which letter represents the enzyme?

a)

A

b)

B

71.

Which letter represents the substrate?

a)

A

b)

B

72.

Which letter represents the Product ?

a)

B

b)

C

c)

D

d)

E

73.

Enzymes are "Specific", which best describes this?

a)

function best under certain environmental conditions

b)

speeds up only one type of reaction.

c)

can catalyze the same reaction over and over again.

74.

Enzymes are "Sensitive" which best describes this?

a)

function best under certain environmental conditions

b)

speeds up only one type of reaction. (Like a lock and key!!!) Example: Amylase – only breaks down starches.

c)

can catalyze the same reaction over and over again.

75.
Enzymes are considered to be 
a)
Lipids
b)
Carbohydrate
c)

Proteins

d)
Nucleic Acid
76.
What is the purpose  of an enzyme?
a)
give permission for the reaction
b)
raise activation energy
c)
speed up reactions
d)
control how many reactions occur
77.
Where do substrates bind on an enzyme?
a)
voltage-gated channels
b)
surface receptor
c)
calcium channels
d)
active site
78.
What is a substance called if it speeds up a chemical reaction?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
79.
What 3 letters do enzymes typically end in?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
80.
What is the name for the mechanism of enzyme activity?
a)
Lock and key
b)
jigsaw puzzle
c)
hammer and nail
d)
two hands pattern
81.
The "lock and key hypothesis" attempts to explain the mechanism of?
a)
Vacuole formation
b)
Pinocytosis
c)
Sharing of electrons
d)
Enzyme specificity 
82.
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 .
83.
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.
84.
Enzymes need certain environmental conditions in order to function properly.  What happens when enzymes are heated to a high temperature?
a)
they die
b)
they denature
c)
they change their amino acid sequence
d)
they work better
85.
What makes an enzyme substrate specific?
a)
Size
b)
Shape
c)
Name
d)
Location it is found in
86.
Which substrate would this enzyme catalyze?
a)
Δ
b)
σ
c)
∅
d)
μ
87.
What factors affect an enzyme's reaction rate?
a)
temperature 
b)
pH
c)
substrate concentration
d)
all of these
88.

Which of these is most likely an enzyme? 

a)
Sucrose
b)
Saccharide
c)
Fructose
d)
Amylase

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