The Cell Lecture 3 0.0 / 5 ? Human BiologyLecture 3UniversityNone Created by: saraht83Created on: 29-04-16 10:45 Prokaryotes divide by... fission 1 of 11 Cytokinesis separates one cell into two 2 of 11 Eukaryotes divide by... mitosis or meiosis 3 of 11 What are chromosomes? DNA molecules packaged into thread-like structures in the nucleus, only visible when cell is dividing 4 of 11 What is a centromere? constriction point, divides chromosome in two 'arms' 5 of 11 What is the short arm called? p arm 6 of 11 What is the long arm called? q arm 7 of 11 What are histones? proteins, compact chromosomal DNA, provide energy 8 of 11 What is the charge on DNA? negative 9 of 11 What is a nucleosome? basic repeating structural and functional unit of chromatin 10 of 11 What are the functions of chromatin? package DNA, strengthen DNA, control gene expression + DNA replication 11 of 11
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