Where is DNA found in a human cell? What is a gene?

DNA is a long molecule found in the nucleus (or more specifically the nucleolus) of a human cell. When it is condensed and shortened it appears, under a microscope, as 23 pairs of chromosomes.

A gene is a long sequence of DNA. This is the same thing as a portion of a chromosome. It encodes a specific protein. This means that the specific DNA sequence can be read by an enzyme and through various cellular processes (transcription and translation) a protein is synthesised. This protein may have its own function or contribute to a larger protein structure that has a function. The protein may function at the cellular level or may be involved in a visible characteristic such as hair colour.

Answered by Ryan M. Biology tutor

16767 Views

See similar Biology GCSE tutors

Related Biology GCSE answers

All answers ▸

What is active transport and how is it different from diffusion?


What are the main similarities and differences in the structure of plant and animal cells?


Bob and Brenda are both heterozygous for a genetically inherited recessive trait. (a) Calculate the probability that they would have a healthy child. Use a genetic diagram to help. (b) Suggest an example of a recessive inherited disorder


What is osmosis?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences