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 ▸What happens in prophase of mitosis?
Define osmosis
Explain how xylem vessels are adapted to carry out their functions in plants. 4 marks
i) Briefly explain the difference between anaerobic and aerobic respiration (2). ii) Which of these reactions produce more energy and briefly describe why?(2)