Describe the basic structure of a DNA and complementary base pairing.

DNA is a large polymer consisting of two DNA strands that form a double helix. Each strand is made up of bases. In DNA, there are four different bases:Adenine, Thymine, Cytosine & GuaninePairs of bases form chemical cross-links between the two strands of DNA to form the final double helix. The base pairs always form a particular way:- Adenine always pairs with Thymine (A --- T)- Cytosine always pairs with Guanine (C --- G)This process is called complementary base pairing.

TD

Related Biology GCSE answers

All answers ▸

In 2012, two scientists were awarded the Nobel prize for their research on stem cells. They showed that adult cells could be reprogrammed to become cells with the properties of embryonic stem cells. Describe the possible benefits of this research.


Describe transcription and translation.


A recessive allele causes condition X. A heterozygous man and homozygous recessive woman want to have a child. Use a punnet square to determine the probability that the child will have condition X.


What is an enzyme?