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890184
Cell Division and DNA
Description
Science Mind Map on Cell Division and DNA, created by miss_asiann2798 on 17/05/2014.
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science
Mind Map by
miss_asiann2798
, updated more than 1 year ago
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Created by
miss_asiann2798
almost 10 years ago
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Resource summary
Cell Division and DNA
Cell Structure and Functions
Unicelllular - One celled
Multicellular= More than 1 cell
Nucleus - Control centre. Contains DNA. Reproduces cells
Cell Membrane - boundary around cell. control exit and entry of substance
Cytoplams - all contents in cell except nuclueus
Ribosomes - small organelles, make proteins or structures
Chloroplasts - contains chlorophyll, pigment to convert sun into food photosythesis
Vacuole - Sacs to store nutrients, waste products and food
Cell wall - tough outer to make plant stronger
Genetic Infomation
DNA located in nucleus
Genetic info stored in chemical -DNA
Deoxyribonucleic Acid
Shaped in a double helix
nucleotides -subuntils of DNA
Adenine
Guanine
Cytosine
Thymine
Sugar and phosphate backbone
Nitrogen bond
Genes Chromosones and DNA
Gene - Unit of inhertence
sequence of nucleotides is a chemical code
DNA molecule = a gene
Thousands of genes wrapped up to make thread like structure - chromosone
Come in 23 pairs with 22 the same and 23rd determines boy or girl
DNA Repilcation
Mitosis - division of cell into 2 to reproduce cells
copying of genetic infomation - DNA replication
Daughter cells may have different genetic code if error happpens
mutation- accidental changes to DNA or CHROMOSONE
Mutation in body - cause death of one cell or may become cancerous
in a gamate may kill egg or sperm or embryo
Cell theory
All living things are made out of cells
Cells are the basic units or building blocks of life
Are cells that come from other cells
Functions of life
To grow
To reproduce
Take in substances from their surroundings and assimilate
respond
excrete wast
extract energy form food
Types of cells
Cell>Tissue>organ>organ system
Media attachments
591cell (image/jpg)
DNA_structure1 (image/png)
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