GCSE BIOLOGY AQA (Organization)EXAM REVISION QUESTIONS
WITH VERIFIED SOLUTIONS LATEST 2025 UPDATE.
Specialized cells - ANSWER- As an organism develops, cells differentiate to form different
types of cells.
As a cell differentiates:
- it may change shape
- different sub-cellular structures develop to let it to carry out a specific function.
Include cells such as sperm, nerve and muscle cells.
Sperm cell - ANSWER- Tail: to propel the sperm to fertilize the egg.
Mitochondria: sperm have many of these cell components, which are the major site of respiration,
to provide energy for their journey.
Nucleus: contains only one set of the genetic material.
Acrosome: contains enzymes to allow the sperm to penetrate the outer layer of the egg.
Muscle cell - ANSWER- Contains:
- nucleus
- many mitochondria for energy
- protein fibres that can contract
Motor neurone - ANSWER- Contains:
- dendrites
- cell body
- axon
- sheath (acts as an insulator)
, Xylem cell - ANSWER- The cells are arranged end to end but the end walls break down to
form hollow tubes.
The cell wall of the cell is strengthened by a substance called lignin.
Phloem cell - ANSWER- The end wall of the cells allow sugars through but support the tubes.
The cells are arranged end to end into tubes.
Contain companion cells.
Root hair cell - ANSWER- Lots of mitochondria for active transport of minerals.
Long projection to increase the surface area to absorb water and minerals.
Tissue - ANSWER- A group of cells with a similar structure and function, which all work
together to do a job.
Examples of tissues - ANSWER- - muscle tissue contracts to produce movement
- glandular tissue produces substances such as enzymes and hormones
- epithelial tissue covers organs
Organs - ANSWER- Groups of different tissues, which all work together to perform a specific
job.
Each may contain several tissues.
Stomach - ANSWER- An organ that contains:
- muscle tissue that contracts to churn the contents
- glandular tissue to produce digestive juices
- epithelial tissue to cover the outside and inside of the stomach
Organ systems - ANSWER- Groups of organs working together to do a particular job.
WITH VERIFIED SOLUTIONS LATEST 2025 UPDATE.
Specialized cells - ANSWER- As an organism develops, cells differentiate to form different
types of cells.
As a cell differentiates:
- it may change shape
- different sub-cellular structures develop to let it to carry out a specific function.
Include cells such as sperm, nerve and muscle cells.
Sperm cell - ANSWER- Tail: to propel the sperm to fertilize the egg.
Mitochondria: sperm have many of these cell components, which are the major site of respiration,
to provide energy for their journey.
Nucleus: contains only one set of the genetic material.
Acrosome: contains enzymes to allow the sperm to penetrate the outer layer of the egg.
Muscle cell - ANSWER- Contains:
- nucleus
- many mitochondria for energy
- protein fibres that can contract
Motor neurone - ANSWER- Contains:
- dendrites
- cell body
- axon
- sheath (acts as an insulator)
, Xylem cell - ANSWER- The cells are arranged end to end but the end walls break down to
form hollow tubes.
The cell wall of the cell is strengthened by a substance called lignin.
Phloem cell - ANSWER- The end wall of the cells allow sugars through but support the tubes.
The cells are arranged end to end into tubes.
Contain companion cells.
Root hair cell - ANSWER- Lots of mitochondria for active transport of minerals.
Long projection to increase the surface area to absorb water and minerals.
Tissue - ANSWER- A group of cells with a similar structure and function, which all work
together to do a job.
Examples of tissues - ANSWER- - muscle tissue contracts to produce movement
- glandular tissue produces substances such as enzymes and hormones
- epithelial tissue covers organs
Organs - ANSWER- Groups of different tissues, which all work together to perform a specific
job.
Each may contain several tissues.
Stomach - ANSWER- An organ that contains:
- muscle tissue that contracts to churn the contents
- glandular tissue to produce digestive juices
- epithelial tissue to cover the outside and inside of the stomach
Organ systems - ANSWER- Groups of organs working together to do a particular job.
