Photosynthesis and Cellular Respiration Quiz

Which of the following is the correct balanced equation for photosynthesis?

• $6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2$

• $C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O$

• $6CO_2 + 12H_2O \rightarrow C_6H_{12}O_6 + 6O_2 + 6H_2O$

• $C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 12H_2O$

Answer explanation

The correct balanced equation for photosynthesis is $6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2$. It shows that carbon dioxide and water are converted into glucose and oxygen, reflecting the process accurately.

What is the correct balanced equation for cellular respiration?

• $6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2$

• $C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O$

• $C_6H_{12}O_6 + 12O_2 \rightarrow 6CO_2 + 6H_2O$

• $6CO_2 + 12H_2O \rightarrow C_6H_{12}O_6 + 6O_2 + 6H_2O$

Answer explanation

The correct balanced equation for cellular respiration is $C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O$. This shows glucose and oxygen converting into carbon dioxide and water, reflecting the process of energy release.

In which part of the cell does photosynthesis primarily occur?

• Mitochondria

• Ribosome

• Chloroplast

• Nucleus

Answer explanation

Photosynthesis primarily occurs in the chloroplasts, which are specialized organelles in plant cells. They contain chlorophyll, the pigment that captures light energy to convert carbon dioxide and water into glucose and oxygen.

Where does cellular respiration mainly take place within a cell?

• Chloroplast

• Mitochondria

• Golgi apparatus

• Endoplasmic reticulum

Answer explanation

Cellular respiration mainly occurs in the mitochondria, which are known as the powerhouse of the cell. They convert nutrients into energy, unlike chloroplasts, which are involved in photosynthesis.

Which of the following is an input for the process of photosynthesis?

• Oxygen

• Glucose

• Carbon dioxide

• ATP

Answer explanation

Carbon dioxide is a key input for photosynthesis, as plants use it along with sunlight and water to produce glucose and oxygen. The other options, like oxygen and glucose, are products of the process, not inputs.

Identify an output of cellular respiration.

• Glucose

• Oxygen

• Carbon dioxide

• Water

Answer explanation

During cellular respiration, glucose is broken down to produce energy, resulting in the release of carbon dioxide and water as byproducts. Therefore, carbon dioxide is a key output of this process.

Which of the following is a similarity between photosynthesis and cellular respiration?

• Both occur in the mitochondria

• Both produce glucose

• Both involve the exchange of gases

• Both require sunlight

Answer explanation

Both photosynthesis and cellular respiration involve the exchange of gases: photosynthesis takes in carbon dioxide and releases oxygen, while cellular respiration takes in oxygen and releases carbon dioxide.

What is the main purpose of cellular respiration?

• To produce glucose

• To convert light energy into chemical energy

• To release energy stored in glucose

• To absorb carbon dioxide

Answer explanation

The main purpose of cellular respiration is to release energy stored in glucose. This process breaks down glucose molecules to produce ATP, which cells use for energy, making it essential for cellular functions.