QCM : Fundamentals of Cell Structure and Function — 10 questions

Questions et réponses du QCM

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

Both the cell wall and chloroplasts are involved in energy production.
The cell wall provides structural support, while chloroplasts are involved in photosynthesis.
Both the cell wall and chloroplasts are involved in cell division.
The cell wall stores nutrients, while chloroplasts protect the cell.

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

Explication

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?

Louis Pasteur
Robert Hooke
Anton van Leeuwenhoek
Theodore Schwann

Robert Hooke

Explication

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?

To produce energy for the cell
To regulate what enters and exits the cell
To synthesize proteins
To store genetic information

To regulate what enters and exits the cell

Explication

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 cell with a nucleus and membrane-bound organelles
A cell without a nucleus, such as bacteria
A cell that only exists in plants
A cell with a large central vacuole and chloroplasts

A cell without a nucleus, such as bacteria

Explication

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?

Cells are the smallest units of matter that make up non-living things
Only plant and animal cells are considered in the Cell Theory
Cells are the basic units of structure but not of function in living organisms
All living organisms are composed of cells and all cells come from pre-existing cells

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

Explication

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?

Ribosomes
Mitochondria
Lysosomes
Chloroplasts

Mitochondria

Explication

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

7. What feature distinguishes plant cells from animal cells?

Presence of lysosomes
Presence of a cell wall, chloroplasts, and large vacuoles
Lack of a nucleus
Ability to perform photosynthesis

Presence of a cell wall, chloroplasts, and large vacuoles

Explication

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?

Cell respiration
Photosynthesis
Fermentation
Protein synthesis

Photosynthesis

Explication

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?

Control passage of substances in and out of the cell
Produce proteins from amino acids
Generate energy for the cell
Store genetic information in the nucleus

Control passage of substances in and out of the cell

Explication

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?

It was established in the late 1600s by Robert Hooke.
It took nearly 200 years to establish that all living organisms are made of cells.
It was first proposed by Louis Pasteur in the 1800s.
It states that only plants and animals are made of cells.

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

Explication

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

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Cell theory — key idea?

All living things are made of cells.

Cell — basic unit of life?

All living organisms are made of cells.

Cell — basic unit of life?

Yes, it performs all life processes.

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