Chromosomes & DNA
The nucleus of a cell contains chromosomes made of DNA molecules. Each chromosome carries a large number of genes.
How many pairs of chromosomes are in a human body cell?
What is Chromosomes & DNA?
"A chromosome is a thread-like structure of nucleic acids and protein found in the nucleus, carrying genetic information."
What is produced by mitosis?
Why are cultures in school laboratories usually incubated at about 25°C rather than 37°C?
Which change would increase the rate of diffusion?
Which answer best completes the statement? The nucleus contains ____ and controls the cell
Genetic Packaging
In body cells, the chromosomes are normally found in pairs.
Human body cells have 23 pairs (46 total) of chromosomes.
Genes are small sections of DNA that code for specific proteins.
Sex cells (gametes) only have 23 single chromosomes, not pairs.
Want to improve faster?
The fastest way to improve your grade is to practise exam-style questions, identify your gaps, and focus only on what you don't know.
Related GCSE Biology Questions
Verified for 2024/25 Exams
Aligned to current UK Science Specifications
Little & Often Content Team
Science Education Specialists