Question 1

What are the basic components of a cell in the Edexcel Lower Secondary Science curriculum?

Accepted Answer

In the Edexcel Lower Secondary Science curriculum, the basic components of a cell include the cell membrane, cytoplasm, and nucleus. The cell membrane controls what enters and exits the cell, the cytoplasm is a jelly-like substance where most cellular activities occur, and the nucleus contains genetic material that regulates cell functions.

Question 2

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

Accepted Answer

Plant and animal cells differ in several ways. Plant cells have a rigid cell wall, chloroplasts for photosynthesis, and a large central vacuole for storage, which are not present in animal cells. Animal cells, on the other hand, have centrioles involved in cell division, which are typically absent in plant cells.

Question 3

Why is cell organisation important in multicellular organisms?

Accepted Answer

Cell organisation is crucial in multicellular organisms because it allows for specialization and efficiency. Different cells perform specific functions, which are organized into tissues, organs, and systems. This organization enables complex biological processes and supports the organism's survival and adaptation.

Question 4

What role do mitochondria play in cells according to the Edexcel Lower Secondary Biology syllabus?

Accepted Answer

Mitochondria are known as the powerhouses of the cell. According to the Edexcel Lower Secondary Biology syllabus, they are responsible for producing energy through the process of cellular respiration. This energy is essential for various cellular activities and overall cell function.

Question 5

How do cells communicate with each other in an organism?

Accepted Answer

Cells communicate with each other through chemical signals and direct contact. Chemical signals, such as hormones and neurotransmitters, are released by one cell and received by another, triggering a response. This communication is vital for coordinating activities and maintaining homeostasis within an organism.

Cells and organisation

Short Notes - Cells and organisation

Study Notes & Exam Tips

Cells and organisation — frequently asked questions