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Organisation of genetic material

Organisation of genetic material

Eukaryotic cells with nuclei measuring only a few micrometres may contain nearly 2 metres of DNA, coiled multiple times.

Biology

Keywords

genetic material, DNA, deoxyribonucleic acid, double helix, chromosome, adenine, thymine, cytosine, guanine, reproduction, purine, pyrimidine, hydrogen bond, histone protein, nucleosome, human, biochemistry, biology

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Animal and plant cells, cellular organelles

Eukaryotic cells contain a number of organelles.

DNA

Carrier of genetic information in cells.

Meiosis

Our gametes are haploid cells produced from diploid cells by meiosis, a special type of cell division.

Mitosis

Mitosis is the process by which a eukaryotic cell divides into two cells and the number of chromosomes remains unchanged.

Purine (C₅H₄N₄)

A heterocyclic aromatic organic compound, its derivatives include guanine and adenine.

Pyrimidine (C₄H₄N₂)

A heterocyclic organic compound, its derivatives are thymine, cytosine and uracil.

2-deoxy-beta-D-ribose (C₅H₁₀O₄)

A component of DNA, it contains one less hydroxyl group than β-D-ribose.

Levels of biological organisation

This animation presents levels of biological organisation from the level of the individual organism to the level of cells.

Paramecium caudatum

Common ciliated eucaryotic unicellular organisms widespread in freshwaters.

Radioactivity

The process of the decay of unstable nuclei is called radioactivity.

Tardigrade

Tardigrades can survive in extreme environments, they can even stay alive in outer space.

Amoeba proteus

Widespread heterotrophic unicellular organisms with constantly changing shapes

Structure of proteins

The structure and arrangement of polypeptide chains affects the spatial structure of proteins.

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