Question 1

What are the main components of a cell according to the Singapore Curriculum in Biology?

Accepted Answer

The main components of a cell, as outlined in the Singapore Curriculum for Biology, include the cell membrane, cytoplasm, nucleus, mitochondria, and ribosomes. Plant cells also have a cell wall, chloroplasts, and a large central vacuole. Each component plays a crucial role in maintaining the cell's functions and overall organization.

Question 2

How does the cell membrane contribute to cell structure and organisation?

Accepted Answer

The cell membrane is a vital component of cell structure and organisation. It acts as a protective barrier that regulates the movement of substances in and out of the cell. This selective permeability helps maintain the internal environment of the cell, ensuring that essential nutrients enter while waste products are expelled, thus contributing to the cell's overall organization and function.

Question 3

Why is the nucleus considered the control center of the cell in Biology?

Accepted Answer

In Biology, the nucleus is considered the control center of the cell because it houses the cell's genetic material, DNA. This genetic material contains the instructions needed for the synthesis of proteins, which are crucial for cell function and organization. The nucleus also regulates cell growth, division, and differentiation, making it essential for maintaining the cell's structure and organization.

Question 4

What role do mitochondria play in cell structure and organisation?

Accepted Answer

Mitochondria are known as the powerhouses of the cell because they produce energy in the form of ATP through cellular respiration. This energy is essential for various cellular processes that maintain cell structure and organisation. By providing the necessary energy, mitochondria support activities such as active transport, synthesis of molecules, and cell division, all of which are crucial for the cell's proper functioning and organization.

Question 5

How do plant cells differ from animal cells in terms of structure and organisation?

Accepted Answer

Plant cells differ from animal cells in several key aspects of structure and organisation. Plant cells have a rigid cell wall that provides structural support and protection. They also contain chloroplasts, which are responsible for photosynthesis, allowing plants to convert light energy into chemical energy. Additionally, plant cells typically have a large central vacuole that maintains cell turgor and stores nutrients and waste products. These features contribute to the distinct organization and functions of plant cells compared to animal cells.

Cell structure and Organisation

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