Practice Questions!
Girls vs. Boys
What do living things do to energy?
They transform it (change it from one form to another)
ATP
How many energy transformations are shown in this diagram?
Two
First transformation
ATP
Second transformation
What is the name of the process that is circled?
Photosynthesis
ATP
What type of organism (autotroph or heterotroph) performs
photosynthesis?
Autotroph
ATP
What is the name of the process that is circled?
Cellular respiration
ATP
What type of organism (autotroph or heterotroph) performs
cellular respiration?
They both do
ATP
Why do BOTH autotrophs and heterotrophs perform cellular
respiration?
To make ATP, a form of energy cells can use
ATP
What part of this diagram does an autotroph do?
All of it
ATP
What part of this diagram does a heterotroph do?
Just cellular respiration.
ATP
Which type of organism (autotroph or heterotroph) has
chloroplasts?
Autotrophs
ATP
Which type of organism (autotroph or heterotroph) has
mitochondria?
They both do, because they both perform cellular respiration.
ATP
Identify the organism below and state whether it is an
autotroph or a heterotroph.
Identify the organism below and state whether it is an
autotroph or a heterotroph.
Identify the organism below and state whether it is an
autotroph or a heterotroph.
Identify the organism below and state whether it is an
autotroph or a heterotroph.
Identify the organism below and state whether it is an
autotroph or a heterotroph.
Identify the organism below and state whether it is an
autotroph or a heterotroph.
Identify the organism below and state whether it is an
autotroph or a heterotroph.
Identify the organism below and state whether it is an
autotroph or a heterotroph.
1. List three reasons why cells need energy using the
pictures below.
2. Describe the process of photosynthesis in terms of:
a. how it transforms energy
b. where in a eukaryotic cell it occurs
3. A molecule of glucose (chemical energy) is made during
photosynthesis. Predict what will happen to it next.
4. Identify each of the four autotrophs below.
A
B
C
D
5. Identify the autotroph below that is most different from
the others, and defend your answer.
A
B
C
D
6. Explain how autotroph C is able to perform
photosynthesis.
A
B
C
D
7. Explain how the organisms below differ from each other in
terms of how they obtain chemical energy.
A
B
8. Explain how the organisms below are similar in terms of
how they use chemical energy.
A
B
10. Identify the gas reactant of photosynthesis.
C
O
O
+
O
H
+
H
CO2 gas
O
11. Identify photosynthesis as an energy-absorbing
or energy-releasing chemical reaction.
C
O
O
+
O
H
+
H
Energy-absorbing.
O
12. Explain why 6 molecules of CO2 are needed in
this reaction.
C
O
O
+
O
H
H
To make the 6-carbon ring of glucose.
+
O
13. Identify the WASTE PRODUCT of photosynthesis.
C
O
O
+
O
H
+
H
O2 (oxygen gas)
O
14. List 3 ways that ATP can be compared to a
battery.
Phosphate Groups
ATP
P
P
P
Fully-Charged
Battery
ATP
Small, portable, stores/transmits energy, reachargeable.
15. Explain what happens to energy when ADP
becomes ATP (is energy absorbed or released?)
Adenine
Phosphate Groups
P
P
P
ADP
Partially-Charged
Adenine
Ribose
Phosphate Groups
ATP
P
P
P
ATP
Fully-Charged
Ribose
When ADP becomes ATP, energy is absorbed.
16. Explain why cells do not keep a lot of ATP on
hand.
It only stores a small amount of energy; it would take up too
much room in the cell.
17. Explain why chlorophyll makes this autotroph
look green.
Reflects green light, absorbs all other colors.
List two ways that photosynthetic organisms affect
the air (or water) around them.
11. How is wood made from sunlight, H2O and CO2?
Plant cells require ATP to absorb essential
mineral ions from the soil against a
concentration gradient.
C H O
When a
1. List the four types of autotrophs shown below.
Hint: on land, in water, unicellular eukaryote, “cyan.”
2. List 4 things that all of these autotrophs have in
common.
Hint: appearance, what they can make, what energy source
they rely on, what substance they contain.
3. List 3 ways that group #4 is different from the
other groups.
Hint: type of cell, size, what it doesn’t have
4. Where did Von Helmont think the mass of a plant
comes from, and was he correct?
5. Why did the candle under the bell jar continue to
burn in Priestly’s experiment?
6. What are the reactants of photosynthesis?
C
O
O
+
O
H
H
+
O
7. What are the products of photosynthesis?
C
O
O
+
O
H
H
+
O
8. How many molecules of carbon dioxide are
needed to make one molecule of glucose?
C
O
O
+
O
H
H
+
O
Hint: think about how many C atoms are needed to
make a molecule of glucose.
9. How many molecules of water are needed to
make one molecule of glucose?
C
O
O
+
O
H
H
+
O
Hint: think about how many H atoms are needed to
make a molecule of glucose.
10. Why is oxygen gas given off as a by-product?
C
O
O
+
O
H
H
+
O
Hint: think about how many O atoms are needed to
make a molecule of glucose.