Test on Organelles and their functions: plant vs. animal cell

Question 1: Animal cells contain a cell wall.

A. Yes

B. No

Explanation: Animal cells never have a cell wall. The cell wall is present only in plant cells, providing rigid support and protection, and is absent in animal cells. The outer boundary of an animal cell is always the flexible cell membrane.

Question 2: Which of the following statements accurately describe the function of the large central vacuole in plant cells, particularly concerning turgor pressure?

A. It is primarily responsible for storing energy as glycogen.

B. It helps maintain turgor pressure by pushing against the cell wall, contributing to the plant's rigidity.

C. It is a structural component that can occupy up to 90% of the cell volume and stores water, nutrients, and waste.

D. It acts as the primary site for photosynthesis, converting light energy into chemical energy.

Explanation: The study materials state that the large central vacuole's primary role in plant cells is to maintain turgor pressure, pushing against the cell wall to keep the plant rigid, and it is a structural component. It also stores water, nutrients, ions, and waste products and can occupy up to 90% of the cell volume. Option 0 is incorrect because glycogen is an animal energy storage molecule, and the vacuole is not primarily for energy storage in this form. Option 3 is incorrect because chloroplasts, not the vacuole, are the sites of photosynthesis.

Question 3: The study materials describe the vacuole as an organelle unique to plant cells.

A. Yes

B. No

Explanation: The study materials mention chloroplasts and the cell wall as unique aspects of plant cells, but do not describe the vacuole as an organelle unique to plant cells. The provided text does not elaborate on the vacuole at all.

Question 4: Based on the described simulation, what is the key concept reinforced about chloroplasts and their role in cells?

A. Chloroplasts can be found in both plant and animal cells, enabling them to perform photosynthesis.

B. The presence of chloroplasts indicates that only plant cells perform photosynthesis.

C. Chloroplasts are essential for structural integrity in both plant and animal cells.

D. Photosynthesis is a process exclusive to animal cells, facilitated by chloroplasts.

Explanation: The study material states, 'if you try to place a chloroplast in an animal cell, the simulation will indicate an error, reinforcing the concept that only plant cells perform photosynthesis.' This highlights that chloroplasts are associated with photosynthesis, and this process is exclusive to plant cells.

Question 5: The nucleus regulates all cell activities by controlling protein synthesis.

A. Yes

B. No

Explanation: The nucleus regulates all cell activities by controlling protein synthesis, as stated in the study materials.