Chloroplasts – Cell Organelles Ep 4

So far, all the organelles we have looked at (the nucleus, mitochondria, ribosomes and RER) are found in both animal and plant cells. Today's organelle, the chloroplasts, are only found in plant cells and some eukaryotic algae. Their main function is to carry out photosynthesis - the reaction that uses light energy to make glucose … Read more

Ribosomes and the RER – Cell Organelles Ep 3

Ribosomes Ribosomes are very small organelles often drawn as dots in diagrams. They are free in the cytoplasm or attached to the rough endoplasmic reticulum (RER). One cell can contain millions of ribosomes if it needs to produce a lot of proteins. If we zoom right in, we find that ribosomes are actually made up … Read more

The Mitochondria – Cell Organelles Ep 2

I believe it is said in meme culture that the mitochondria are the powerhouses of the cell. I'm not going to pretend to know why that is a meme, but there is some truth in it. The main function of the mitochondria is to carry out aerobic respiration (except the first stage) which produces adenosine … Read more

The Nucleus – Cell Organelles Ep 1

Cell organelles, or subcellular structures, are specialised to carry out certain functions. The main function of the nucleus is to contain the genetic material (DNA) of the cell. And where better to begin A-Level biology revision than at the information centre of the cell. The Nucleus The nucleus (plural nuclei) is often drawn as a … Read more

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