Quiz: Fundamentals of Cell Structure and Function — 10 perguntas

1. How do the cell wall and chloroplasts in plant cells differ from each other?

A. Both the cell wall and chloroplasts are involved in energy production.

B. The cell wall provides structural support, while chloroplasts are involved in photosynthesis.

C. Both the cell wall and chloroplasts are involved in cell division.

D. The cell wall stores nutrients, while chloroplasts protect the cell.

Answer: (B)

Explicação

The cell wall in plant cells provides structural support and protection, whereas chloroplasts are organelles responsible for carrying out photosynthesis, converting sunlight into chemical energy. They serve different functions and are distinct structures within the cell.

2. Who was the scientist responsible for first observing and naming 'cells' using a microscope in the late 1600s?

A. Louis Pasteur

B. Robert Hooke

C. Anton van Leeuwenhoek

D. Theodore Schwann

Answer: (B)

Explicação

Robert Hooke was the scientist who first observed and named 'cells' in cork tissue in the late 1600s, laying the foundation for cell biology.

3. What is the primary role of the cell membrane in a cell?

A. To produce energy for the cell

B. To regulate what enters and exits the cell

C. To synthesize proteins

D. To store genetic information

Answer: (B)

Explicação

The cell membrane's main purpose is to act as a semi-permeable barrier that controls what substances can enter or leave the cell, maintaining internal stability.

4. Which of the following best describes a prokaryotic cell?

A. A cell with a nucleus and membrane-bound organelles

B. A cell without a nucleus, such as bacteria

C. A cell that only exists in plants

D. A cell with a large central vacuole and chloroplasts

Answer: (B)

Explicação

Prokaryotic cells, like bacteria, lack a nucleus and membrane-bound organelles, unlike eukaryotic cells.

5. What does the Cell Theory primarily state about living organisms?

A. Cells are the smallest units of matter that make up non-living things

B. Only plant and animal cells are considered in the Cell Theory

C. Cells are the basic units of structure but not of function in living organisms

D. All living organisms are composed of cells and all cells come from pre-existing cells

Answer: (D)

Explicação

The Cell Theory states that all living organisms are made up of cells, and that all cells arise from pre-existing cells. This is the fundamental principle captured by option 0, making it the correct answer.

6. Which organelle is primarily responsible for energy production in the cell?

A. Ribosomes

B. Mitochondria

C. Lysosomes

D. Chloroplasts

Answer: (B)

Explicação

Mitochondria generate energy in cells through cellular respiration, making them the powerhouse of the cell.

7. What feature distinguishes plant cells from animal cells?

A. Presence of lysosomes

B. Presence of a cell wall, chloroplasts, and large vacuoles

C. Lack of a nucleus

D. Ability to perform photosynthesis

Answer: (B), (D)

Explicação

Plant cells have a cell wall, chloroplasts for photosynthesis, and large vacuoles, features not found in animal cells.

8. Which process converts sunlight, CO₂, and water into glucose and oxygen?

A. Cell respiration

B. Photosynthesis

C. Fermentation

D. Protein synthesis

Answer: (B)

Explicação

Photosynthesis is the process where chloroplasts in plant cells convert sunlight, CO₂, and water into glucose and oxygen.

9. What is the role of the cell membrane?

A. Control passage of substances in and out of the cell

B. Produce proteins from amino acids

C. Generate energy for the cell

D. Store genetic information in the nucleus

Answer: (A)

Explicação

The cell membrane is semi-permeable and regulates what enters and exits the cell, maintaining homeostasis.

10. Which statement is true about the development of the Cell Theory?

A. It was established in the late 1600s by Robert Hooke.

B. It took nearly 200 years to establish that all living organisms are made of cells.

C. It was first proposed by Louis Pasteur in the 1800s.

D. It states that only plants and animals are made of cells.

Answer: (B)

Explicação

The Cell Theory was developed over nearly 200 years, affirming that all living organisms are composed of cells, a key milestone in biology.