This Grade 9 Cellular Respiration worksheet helps students understand how cells release energy from food.
Students will complete fill-in-the-blank questions covering glucose, oxygen, ATP, and mitochondria.
Cellular Respiration — Practice
0 / 6
Try these before or after you print the worksheet. The printable asks you to fill in the words. This asks what goes in and what comes out — which is the part that makes the equation make sense rather than just be memorised.
Question 1 — put them in order
Click these in order, following one glucose molecule through.
In → mitochondria → broken down → waste out. Reading it as a journey rather than an equation makes the inputs and outputs much harder to mix up.
Question 2
Which two things go into cellular respiration?
Glucose and oxygen go in; carbon dioxide and water come out. Swapping them round describes photosynthesis instead, which is why the two are so easily confused.
Question 3
Where in the cell does cellular respiration take place?
The mitochondria — often called the powerhouse of the cell for exactly this reason.
Question 4
Energy released during respiration is stored as:
ATP. Glucose is the fuel going in; ATP is the usable energy coming out — a bit like the difference between petrol and a charged battery.
Question 5
Which organisms carry out cellular respiration?
All living things. Plants photosynthesise and respire — a common mistake is to think the two are alternatives rather than both happening.
Question 6 — select all that apply
Select every product of cellular respiration, then press Check.
Carbon dioxide, water and ATP. Glucose and oxygen are the inputs, not the products — and chlorophyll is not involved in respiration at all.
Think about it
Cellular respiration uses oxygen and gives off carbon dioxide. Where have you met that pair before?
Plants photosynthesise. Do they also respire? When?
Why do you breathe faster when you run?
Glucose goes in and ATP comes out. Why does a cell bother with the conversion instead of using glucose directly?