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Chemical reactions in biology

Total questions: 67

Worksheet time: 48mins

Name
Class
Date
1.

The process by which plants, some Bacteria, and some Protists make their own food is called __________.

a)

Phototropism

b)

Cellular Respiration

c)

Mitosis

d)

Photosynthesis

2.

Why is sunlight/ light energy written above the arrow and not as a Reactant?

a)

Sunlight makes plants green and only green plants photosynthesize

b)

Light energy travels through the plant down to the roots and causes the water rise

c)

Sunlight is needed for the chemical reaction in photosynthesis to occur

d)

Light energy can be written as either a Reactant or a Product of photosynthesis

3.

Multiple select: What are the products of photosynthesis?

a)

oxygen

b)

water

c)

glucose

d)

carbon dioxide

e)

light energy

4.

Where does photosynthesis occur?

a)

Golgi Body

b)

Chloroplast

c)

Nucleus

d)

Mitochondria

e)

Cell Wall

5.

Multiple select: An organism that cannot make its own food is called a/n __________.

a)

abiotic

b)

autotroph

c)

producer

d)

consumer

e)

heterotroph

6.

Nearly all living organisms obtain energy either directly or indirectly from the ____________ captured during photosynthesis.

a)

sun

b)

moon

c)

soil

d)

water

e)

atmosphere

7.

Where does the digestive system start?

a)

The liver

b)

The throat

c)

The stomach

d)

The mouth

8.
The process by which the body breaks down food so that it can be used for energy.
a)
composition
b)
digestion
c)
deposition
d)
absorption
9.
What is the definition for digestion?
a)
Breaking down food into smaller nutrients
b)
Getting rid of waste products
c)
Getting food into our bodies
d)
Getting nutrients into our bloodstream, so that our cells can use them
10.
Enzymes and acids are examples of 
a)
mechanical digestion
b)
chemical digestion
11.
Chewing, grinding, and churning are examples of...
a)

physical digestion

b)
chemical digestion
12.
Which is an example of a lipid
a)
fat
b)
starch
c)
glucose
d)
hemoglobin
13.
Glucose (sugar) is an example of a
a)
Carbohydrate
b)
Lipid
c)
Protein
d)
Nucleic Acid
14.
Which subunits make up the structure of all proteins?
a)
glucose
b)
amino acids
c)
carbohydrates
d)
fatty acids
15.

Sugar belongs to which class of macromolecules?

a)

proteins

b)

lipids

c)

nucleic acids

d)

carbohydrates

16.
Which foods are considered carbohydrates?
a)
potatoes & bread
b)
steak & fish 
c)
milk & cheese 
d)
chicken & yogurt 
17.
Which statement about photosynthesis is correct?
a)
Plants get the energy they need for photosynthesis from water.
b)
Plants get the energy they need for photosynthesis from soil.
c)
Plants get the energy they need for photosynthesis from sunlight.
d)
Plants get the energy they need for photosynthesis from carbon dioxide.
18.
What are the products of photosynthesis?
a)
Glucose and Chlorophyll
b)
Glucose and Oxygen
c)
Water and Light energy
d)
Carbon Dioxide and Light energy
19.
How does photosynthesis benefit heterotrophs?
a)
It adds carbon dioxide to the air.
b)
It creates a source of energy they can eat.
c)
It creates clean water.
d)
It eliminates harmful sugars.
20.
What three things are needed for a plant to do photosynthesis?
a)
Glucose, Oxygen, Sunlight
b)
CO2, Oxygen, Sunlight
c)
CO2, Water, Sunlight
d)
Oxygen, Water, Sunlight
21.
Please select who performs cellular respiration: 
a)
Animals 
b)
Both animals and plants 
c)
plants 
22.
Cellular respiration is...
a)
the process by which cells break down glucose into energy. 
b)
the process by which cells break light down into energy. 
c)
the process by which cells communicate with other cells. 
23.
Cellular respiration occurs in 
a)
chloroplasts 
b)
mitochondria
c)
golgi aparatus 
d)
thylakoid 
24.

Photosynthesis requires what organelle to occur?

a)

Mitochondria

b)

Chloroplast

c)

Cytoplasm

d)

Endoplasmic Reticulum

25.

Cellular Respiration requires what organelle to occur?

a)

Mitochondria

b)

Chloroplast

c)

Cytoplasm

d)

Endoplasmic Reticulum

26.

In regards to how they obtain energy, these organisms are what?

a)

Autotrophs

b)

Heterotrophs

c)

Plants

d)

Photophilic

27.

In regards to how it obtains energy, this frog is what?

a)

Autotrophic

b)

Heterotrophic

c)

Animal

d)

Cellular Respiration

28.

Almost every food chain/web on planet Earth can be traced back to a ____________ or an ____________.

a)

Plant

b)

Animal

c)

Algae

d)

Chloroplast

29.

What process does this represent?

a)

Photosynthesis

b)

Cellular Respiration

c)

Mitochondria

d)

Chloroplast

30.

What is missing from the equation? Choose the best answer.

a)

Water (6H2O)

b)

ATP

c)

Dihydrogen Monoxide

d)

Mitochondria

31.

What is missing from the equation? Choose the best answer.

a)

Sugar

b)

Sucrose

c)

Chloroplast

d)

Glucose (C6H12O6)

32.

What energy molecule, required for many heterotrophs, is created by Cellular Respiration?

a)

ATP

b)

Glucose

c)

Energy

d)

Adenosine Diphosphate

33.

What is missing from the equation? Choose the best answer.

a)

Nitrogen

b)

Glucose (C6H12O6)

c)

Carbon Dioxide (6CO2)

d)

Carbon Monoxide

34.

What is missing from the equation? Choose the best answer.

a)

Liquid

b)

Glucose (C6H12O6)

c)

Water (6H2O)

d)

Carbon Monoxide

35.

Absorbs energy

a)

Endothermic

b)

Exothermic

36.

Cellular Respiration

a)

Endothermic

b)

Exothermic

37.

Energy is being taken in

a)

Endothermic

b)

Exothermic

38.

Photosynthesis

a)

Endothermic

b)

Exothermic

39.

The sun gives us what type of energy?

a)

chemical

b)

radiation

c)

potential

d)

kinetic

40.

For the body to use food for energy and building materials, the food must first be ______________________ into molecules that are absorbed and transported to cells.

a)

built

b)

digested

c)

circulated

d)

transmogrified

41.

Crystal is trying to increase the protein in her diet. Which foods will best satisfy this nutritional need?

a)

peas, fish, milk, and beans

b)

apples, carrots, juice, and rice

c)

kiwi, lettuce, tea, and strawberries

d)

watermelon, spinach, coffee, and pasta

42.

Which best describes the relationship between diet and exercise for a healthy body?

a)

Consuming large amounts of carbohydrates ensures energy to perform exercise.

b)

A well-balanced diet increases energy levels and improves the ability to exercise.

c)

The body burns more calories through exercise if a high-fat content diet is consumed.

d)

Poor nutritional quality causes the body to increase energy production and provides more energy for exercise.

43.

An ________________ is any substance that cannot be broken down into simpler substances.

a)

Carbohydrate

b)

Cell

c)

Element

d)

Compound

44.

What forms when two or more elements combine chemically?

a)

Compounds

b)

Elements

c)

Carbohydrates

d)

Proteins

45.

Carbohydrates

a)

Make up cell membranes

b)

Energy-rich organic compounds made of the elements carbon, hydrogen, and oxygen

c)

Large organic molecules made of carbon, hydrogen, oxygen, nitrogen, and, in some cases, sulfur

d)

A group of proteins that speed up chemical reactions in living things

46.

A group of proteins that speed up chemical reactions in living things.

a)

Nucleic Acids

b)

Enzymes

c)

Lipids

d)

Carbohydrates

47.

40 grams of calcium reacts with 71 grams of chlorine to produce _______ g of calcium chloride.

a)

31

b)

101

c)

100

d)

111

48.

______ g of hydrogen reacts with 32 g of oxygen to produce 34 g of hydrogen peroxide.

a)

2

b)

3

c)

66

d)

64

49.

Is the chemical equation following the Law of Conservation of Mass?

3 H2 + N2 → 2 NH3

a)

Yes, it is following the Law

b)

No, it is not following the Law

50.

How many oxygen atoms in TOTAL make up the chemical equation below?

6 CO2 + 6 H2O → C6H12O6 + 6 O2

a)

18 atoms total

b)

6 atoms total

c)

36 atoms total

d)

2 atoms total

51.

Mass is neither created nor ______________.

a)

made

b)

destroyed

c)

changed

52.
Students react baking soda & vinegar.
Which of the following would provide the evidence that the number of atoms present before a chemical reaction is equal to the number of atoms present after the chemical reaction?
a)
The mass of the plastic bag, baking soda, and vinegar before the reaction was equal to the mass after the reaction.
b)
Bubbles were produced during the reaction, which meant that a gas was being produced.
c)
The plastic bag did not change in any way, indicating that it was not involved in the reaction.
d)
The mass of the baking soda was exactly equal to the mass of the vinegar used to create the chemical reaction.
53.
Molecule
a)
A group of atoms bonded together
b)
Basic unit of a chemical element
c)
Coefficient
d)
Subscript
54.
Maria fills a bowl with 200 g of water. She puts the bowl of water in the freezer, and the water freezes. Which will most likely be the mass of the frozen water?
a)
50 g
b)
100 g
c)
200 g
d)
400 g
55.

How many atoms do you have in the compound 2MgCl2?

a)

2 atoms

b)

4 atoms

c)

6 atoms

d)

8 atoms

56.
This type of system allows matter to flow freely in and out...
a)
Closed System
b)
Open System
57.
What types of systems are there?
a)
Mechanical and Electrical Systems
b)
Inside and Outside Systems
c)
Open and Closed Systems
d)
Human and Machine Systems
58.
A precipitate is a 
a)
liquid that forms when two solids are reacted
b)
a solid that forms when two liquids are mixed
c)
a gas that forms when vinegar and baking soda react
d)
a change of color in a solution
59.
Which of these is not a chemical reaction?
a)
Burning of wood
b)
Milk going bad
c)
Mixing vinegar and baking soda
d)
Melting of ice
60.
The number to the lower side of an element is a 
a)
Subscript
b)
Superscript
c)
Coefficient
d)
Charge
61.

What is matter? (choose the best answer)

a)

Anything with mass and takes up space

b)

Where to begin?

c)

Solids

d)

things I can see and touch

62.

Chemical properties include

a)

Melting point

b)

Reactivity

c)

Flammability

d)

Rust

63.

What happens in EVERY chemical change?

a)

A gas is produced.

b)

A temperature change occurs.

c)

At least 3 substances combine

d)

A new substance is formed.

64.

Marcus folded a piece of paper to make an airplane. He commented " I caused a chemical change!" Which statement BEST describes Marcus' claim?

a)

Marcus was correct because only a chemical change can create something new.

b)

Marcus is right because folded paper can never go back to its original shape.

c)

Marcus' claim is incorrect because folding paper doesn't cause the molecules to rearrange.

d)

Marcus is incorrect because a gas is always produced during a chemical change.

65.
Which of the following is a sign that a chemical reaction has occurred?
a)
change in shape
b)
melting
c)
formation of a gas
d)
dissolving
66.
Which of the following indicates a chemical change?
a)
Change in state of matter
b)
Temperature change
c)
Change in size 
d)
Change in shape
67.

Which of the following is an example of a chemical change?

a)

Dissolving salt

b)

Crushing a juice box

c)

Frying an egg

d)

Melting silver

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