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DNA

DNA

Carrier of genetic information in cells.

Ķīmija

Atslēgvārdi

DNS, DNS spirāle, DNS ķēde, ģenētiskais materiāls, dezoksiribonukleīnskābe, nukleīnskābe, adenīns, tīmīns, citozs, guanīns, polinukleotīds, slāpekli saturoša bāze, dezoksiriboze, fosforskābe, nukleotīds, bāzes pāri, ģenētiskais kods, Watson, Kriks, Franklins, Wilkins, labais, papildinošs, kodols, ķīmija, bioķīmija, Bioloģija

Saistītie vienumi

2-deoxy-beta-D-ribose (C₅H₁₀O₄)

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

Organisation of genetic material

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

Phosphoric acid (H₃PO₄)

It is also used as a food additive, limescale and rust remover.

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.

RNA

A polynucleotid made up of phosphoric acid, ribose, and nucleobases (cytosine, uracil, adenine and guanine).

Amoeba proteus

Widespread heterotrophic unicellular organisms with constantly changing shapes

Bacteria (advanced)

Bacteria are unicellular organisms that have no nuclei and are a few micrometres in length.

Genome editing

Genome editing is a type of genetic engineering which results in changes in the genome of an organism. This animation presents one of the best-known genome...

Mitosis

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

Phosphate ion (PO₄³⁻)

A compound ion formed when a phosphoric acid molecule releases a proton.

Prenatal development

This animation demonstrates the development of the human embryo and foetus.

Tardigrade

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

The structure of prokaryotic and eukaryotic cells

There are two basic cell types: prokaryotic and eukaryotic cells.

Animal and plant cells, cellular organelles

Eukaryotic cells contain a number of organelles.

Bacteria (spheres, rods, spirals)

Bacteria occur in a wide range of shapes, including spheres, rods and spirals.

Fibroin

Fibroin is a fibrillar protein excreted by silkworms.

Polymerisation of ethene

Polymerised ethylene is known as polyethylene, a type of plastic.

Viruses

Viruses consist of protein and DNA or RNA; they reprogram infected cells to produce more viruses.

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