Search results with tag "Biologymad a level"
DNA (DNA = deoxyribonucleic acid) - BiologyMad A-Level …
www.biologymad.comDNA (DNA = deoxyribonucleic acid) • DNA is the genetic material of all living cells and of many viruses. • DNA is: an alpha double helix of two polynucleotide strands. • The genetic code is the sequence of bases on one of the strands. • A gene is a specific sequence of bases which has the information for a particular protein. • DNA is self-replicating - it can make an identical copy ...
Meiosis. - BiologyMad A-Level Biology
www.biologymad.com2) In Metaphase I, the homologous pairs of chromosomes line up randomly across the equator of the cell, so each daughter cell will get a random mixture of ‘mother’ and ‘father’ chromosomes. This is known as ‘independent assortment’ and is the second cause of variation.
THE CIRCULATORY SYSTEM - BiologyMad A-Level …
biologymad.comTHE HEART 1. The central organ of the cardiovascular system is the heart. This is a hollow, muscular organ that contracts at regular intervals, forcing blood through the circulatory system.
INTRODUCTION TO THE CELL - BiologyMad A-Level Biology
biologymad.comCHAPTER 1: STRUCTURE AND FUNCTION OF THE CELL INTRODUCTION TO THE CELL Both living and non-living things are composed of molecules made from chemical elements such as