Biology Answers: How do enzymes work?

Post your biology questions and biology answers here. That’s what this site is for. Someone asked me how it is possible specifically for enzymes to lower the activation energy of a chemical reaction. It came up with digestive enzymes that Continue reading Biology Answers: How do enzymes work?

Tutorial on acids and bases

This week I made a video tutorial on acids and bases. This is part 3 of the chemistry of water. In addition to a tutorial on acids and bases, I’ve also added in a bit about ocean acidification. Here’s the Continue reading Tutorial on acids and bases

Science Tutorial on the Periodic Table

This week’s science tutorial is about the periodic table of the elements. I assume you already know what the atomic number means, and you understand a little bit about orbitals and electron shells. (If not, go to this video science tutorial). Continue reading Science Tutorial on the Periodic Table

Chemical Reactions: A basic tutorial

On Saturday I was making cinnamon rolls for my family. And it occurred to me how many chemical reactions take place in everyday processes. When I make a batch of cinnamon rolls, a lot of chemical reactions are taking place. Continue reading Chemical Reactions: A basic tutorial

Science tutor video: acids and bases

I’m finally branching out, and adding a little bit of chemistry to my science tutor video series. This short (6-minute) science tutor video covers the established definitions of acids and bases. I’ve also put in a quick tutorial on the Continue reading Science tutor video: acids and bases