lysosome

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28 05, 2017

What are lysosomes? Parts of a cell – Biology

By |2018-04-15T17:01:41-07:00May 28th, 2017|Biology|0 Comments

Lysosomes (under an electron microscope) Prokaryote cells don't have lysosomes, so the first lysosomes probably evolved about the same time as the other pieces of eukaryote cells. That was about two billion years ago. Like the vacuoles and the Golgi bodies and the other parts of a cell, lysosomes (LIE-sew-somes (like HOMES)) are [...]

28 05, 2017

What is a Golgi body? Parts of a cell – Biology

By |2019-07-10T08:48:01-07:00May 28th, 2017|Biology|0 Comments

Image of a Golgi body. Taken with an electron microscope at the University of Melbourne, Australia How does a cell make Golgi bodies? First the RNA of a eukaryote cell finishes assembling new protein or lipid or sugar molecules in the endoplasmic reticulum. Then the molecules gradually pinch off a little piece of [...]

28 05, 2017

How do cells get rid of cell waste?

By |2019-06-02T21:16:50-07:00May 28th, 2017|Biology|4 Comments

Cell waste: A cell with a vacuole Cell waste and vacuoles Soon after eukaryote cells began to make vacuoles to help them catch their food and store it, about 600 million years ago, the cells also began to use the vacuoles to get rid of garbage in the cell - molecules that the [...]

28 05, 2017

What is an enzyme? Cell biology

By |2019-05-30T07:55:45-07:00May 28th, 2017|Biology|0 Comments

A model of an enzyme reacting with another molecule and breaking it into two pieces. Each little ball represents an atom.This enzyme, lysozyme, breaks up bacteria in your blood to keep you from getting sick. What are enzymes made of? An enzyme is a kind of big, complicated protein molecule, made mainly of [...]

28 05, 2017

Cell digestion – Parts of a cell – Cell Biology

By |2019-05-07T14:54:58-07:00May 28th, 2017|Biology|0 Comments

Amoeba - a one-celled organism - Cell digestion How do cells get energy? All cells have to have some way to get energy from outside themselves, or they will starve to death. The earliest, simplest cells, about 3.5 billion years ago, got their food by drifting around in the ocean until they came [...]