AQA GCSE Biology
AQA GCSE Biology 4.2.1 Principles of Organisation Exam Questions
Free AQA GCSE Biology exam questions for 4.2.1 Principles of Organisation, with a mark scheme for every pack. Covers levels of organisation from cells to tissues, organs, organ systems and whole organisms, with plant and animal examples.
4.2.1 Principles of Organisation exam questions
1 question pack of real past exam questions, each with its mark scheme. Do not stop after a few: answer as many as you can without notes, then mark every answer with the mark scheme. The more questions you do, the more quickly you will spot how examiners ask about each idea.
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About AQA GCSE Biology 4.2.1 Principles of Organisation
Principles of organisation is a short opening section of the AQA Organisation topic, examined on Paper 1. It sets out how cells are the basic building blocks of life and how they are grouped into tissues, organs and organ systems that work together to form an organism. Although it is brief, the vocabulary is tested throughout the rest of 4.2, in the digestive, circulatory and plant transport systems. Examiners often ask you to classify a structure as a cell, tissue, organ or organ system, or to define these terms precisely.
What you need to know
- Cells Cells are the basic building blocks of all living organisms. Specialised cells, such as muscle cells or root hair cells, have adaptations that suit them to a particular function.
- Tissues A tissue is a group of cells with a similar structure and function. Examples include muscular tissue, glandular tissue and epithelial tissue in animals, and xylem, phloem and palisade mesophyll in plants.
- Organs An organ is an aggregation of tissues performing specific functions. The stomach contains muscular, glandular and epithelial tissue; the leaf is a plant organ.
- Organ systems Organs are organised into organ systems, which work together to form organisms. Examples are the digestive system, the circulatory system and the plant transport system of roots, stems and leaves.
- Linking the levels Be ready to place structures in the hierarchy: cell, tissue, organ, organ system, organism. For example, a red blood cell is a cell, blood is a tissue, the heart is an organ, and the circulatory system is an organ system.
Common mistakes in 4.2.1 Principles of Organisation
- Defining a tissue as 'a group of cells'. It is a group of cells with a similar structure and function.
- Calling the heart or the stomach a tissue. Both are organs because they contain several different tissues.
- Thinking plants do not have organs. Leaves, stems and roots are plant organs.
- Saying an organ system is 'lots of organs'. It is a group of organs working together to perform a particular function.
Try three 4.2.1 Principles of Organisation exam-style questions
1. Define the term organ. (1 mark)
Show the mark scheme answer
A group of different tissues working together to perform a specific function
2. The stomach contains muscular tissue, glandular tissue and epithelial tissue. Describe the role of each tissue. (3 marks)
Show the mark scheme answer
Muscular tissue contracts to churn the contents; glandular tissue produces digestive juices such as enzymes and hydrochloric acid; epithelial tissue covers the inside and outside of the stomach
3. Put these in order of increasing size of organisation: digestive system, epithelial cell, stomach, epithelial tissue. (2 marks)
Show the mark scheme answer
Epithelial cell; epithelial tissue; stomach; digestive system (all four in correct order for 2 marks, one error for 1 mark)
4.2.1 Principles of Organisation FAQs
What does AQA GCSE Biology 4.2.1 Principles of organisation cover?
It covers the levels of organisation in living things: cells, tissues, organs, organ systems and organisms.
Which paper is 4.2.1 Principles of organisation examined on?
Organisation is assessed on Paper 1.
What examples should I learn for principles of organisation?
Learn at least one animal and one plant example at each level, such as epithelial tissue, the stomach and the digestive system, and xylem tissue, the leaf and the plant transport system.
