Biology: Age 16

7 illustrated Biology lessons for Age 16.

How DNA Copies Itself Before a cell divides, its DNA is copied during S phase of the cell cycle. The double helix unzips and each ol…
Semi-conservative DNA replication DNA replication begins when the double helix unwinds and separates. Each old strand directs the formation of a…
DNA replication fork At the replication fork, the double helix opens and the two strands separate. Along each old strand, DNA polym…
Gene Variants and Inheritance Genes come in different versions called variants, and some variants are dominant while others are recessive. T…
Blocked receptors at a nerve-muscle junction Curare blocks acetylcholine receptors on muscle fibres. The muscle fibres cannot contract, so the muscle stays…
Slime Mold Maze Run A yellow slime mold spreads through a tabletop maze. It withdraws from dead ends and thickens along the shorte…
Leaf and Snail Swap Gases Inside the sealed jar the leaf takes in carbon dioxide and water and, using sunlight, builds sugar while relea…