Science Grade 9 Reviewer

Which of the following terms describes the process of food-making in plants?

• Fermentation

• Photosynthesis

• Respiration

• Transpiration

Which of the following is not involved in the process of photosynthesis?

• Carbon dioxide

• Glucose

• Nitrogen gas

• Water

Which of the following equations is the correct chemical equation for photosynthesis?

• 6CO2+6H2O → C6H12O6+6O2

• 6O2+6H2O → C6H12O6+6CO2

• 6O2+6CO2 → C6H12O6+6H2O

• C6H12O6+6O2 → 6CO2+6H2O

In which organelle of plant cells does photosynthesis occur?

• Cell wall

• Chloroplast

• Stomata

• Stroma

Which of the following processes in photosynthesis is incorrectly described?

• Water and carbon dioxide enters the leaf through the guard cells.

• Light energy is captured by chloroplasts found in the mesophyll cells.

• In the last step of the photosynthesis, glucose exits the leaf while oxygen leaves through the stomata.

• In one step of photosynthesis, glucose and oxygen are produced through a series of chemical reactions inside the chloroplasts.

How many water molecules are needed to make one molecule of glucose?

• Eighteen

• Six

• Twelve

• Twenty four

Which pigment found in plants is responsible for the green color of their leaves?

• Carotenoid

• Chlorophyll

• Haemocyanin

• Xanthophyll

Which of the following organisms do not produce their own food?

• Cyanobacteria

• Dogs

• Gumamela

• Phytoplankton

In which of the following organelles is chlorophyll specifically located?

• Cell wall

• Stomata

• Stroma

• Thylakoids

DIRECTIONS: Read each question carefully. Encircle the letter of the correct answer. The guard cells control the movement of which of the following organelle?

• Cell wall

• Stomata

• Stroma

• Thylakoids