Biology & 3D Animation Library

DNA Has Four Units

Four units of DNA

A, C, G and T. adenine cytosine guanine and thymine. These are the four chemical building blocks of the DNA molecule. They are componants of nucleic acid, which gives DNA it's tongue-twisting full name: deoxyribonucleic acid.

dna molecule, deoxyribonucleic acid, cytosine, thymine, guanine, adenine, nucleic acid, building blocks, tongue

This animation is available on YouTube .

Related Content

15533. DNA Has Four Units, 3D animation

Blocks to bases, DNA Has Four Units.

  • ID: 15533
  • Source: DNALC.DNAi

1445. DNA

Because it contains the directions for assembling the components of the cell, DNA is often thought of as the "instruction book" for assembling life.

  • ID: 1445
  • Source: G2C

16342. Animation 15: DNA and proteins are key molecules of the cell nucleus.

Friedrich Miescher and Phoebus Levene research nuclein, protein. and DNA.

  • ID: 16342
  • Source: DNALC.DNAFTB

15495. Chargaff's ratios, 3D animation with narration

Erwin Chargaff found that in DNA, the ratios of adenine (A) to thymine (T) and guanine (G) to cytosine (C) are equal. This parity is obvious in the final DNA structure.

  • ID: 15495
  • Source: DNALC.DNAi

16421. Concept 19: The DNA molecule is shaped like a twisted ladder.

Deoxyribose and phosphate molecules form the uprights and nucleotide pair form the rungs of the DNA ladder.

  • ID: 16421
  • Source: DNAFTB

15681. DNA nucleotides represented as wooden tiles

Changes in the DNA are reflected in the protein product. There is a correlation between what happens to the genetic sequence and the resulting protein sequence.

  • ID: 15681
  • Source: DNAi

15492. Discovering the double helix structure of DNA, James Watson, video with 3D animation and narration

James Watson used cardboard cutouts representing the shapes of the DNA bases to figure out how bases pair.

  • ID: 15492
  • Source: DNAi

16442. Concept 20: A half DNA ladder is a template for copying the whole.

DNA polymerase and an experiment using nitrogen isotopes prove DNA replication.

  • ID: 16442
  • Source: DNAFTB

16422. Animation 19: The DNA molecule is shaped like a twisted ladder.

James Watson and Francis Crick explain how they solved the structure of DNA. Erwin Chargaff explain how he measured the levels of each of the four nitrogenous bases.

  • ID: 16422
  • Source: DNALC.DNAFTB

15567. DNA sequence

Early sequencers used four different reactions to determine the placement of each of DNA's four bases - known as A, C, T & G - in the sequence.

  • ID: 15567
  • Source: DNAi