DDB Chapter 2

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Links for the Second Chapter


Sample lab writeups:
These are examples of how to write up the labs in this chapter.

Sample for Experiment 2.1
Sample for Experiment 2.2
Sample for Experiment 2.3

This video discusses atomic structure.

Ionic and Covalent Bonds
This video discusses how atoms either share or exchange electrons to form molecules.

Hydrogen Bonds
This video discusses how hydrogen bonds form and what they do. It also explains why water is polar, and what that means when it comes to mixing things with water.

Why Water Expands When it Freezes
This video discusses how hydrogen bonds form and what they do.

An experiment showing that water expands when it freezes
This video shows how powerful water is when it expands as it freezes.

Cohesion, Adhesion, and Capillary Action
This video explains capillary action. He talks about it in a way chemists need to understand it, so you don’t need to worry about what he says regarding the meniscus. Just concentrate on how he explains the interplay between adhesion and cohesion.

This video explains the three forms of carbohydrates.

Dehydration and Hydrolysis
This video explains how monomers come together and how they can be broken apart.

Saturated and Unsaturated Fats
This video explains triglycerides.

This video explains phospholipids.

Amino acids and Proteins
This video explains amino acids and how they form proteins. You don’t need to know the difference between polar, nopolar, and nonstandard amino acids.

Levels of structure in proteins
This video explains the four levels of structure in a protein.

Nucleic Acids
This video explains nucleic acids. You don’t need to worry about the last portion (about ATP) right now, but it will be important in the next chapter.

DNA 5′ and 3′
This video explains how to find the 5′ and 3′ ends on DNA

DNA Replication
This video animates the replication of DNA.

Transcription and Translation 1
This video is a simplified look at protein synthesis.

Transcription and Translation 2
This video animates the production of proteins from DNA.

To give you an idea of what a biomachine is, you can watch this animation, which shows how a single molecule in a bacterium behaves:

You can also read this article, which explains why the molecule is important to bacteria.

Chemical Evolution
In this video, Dr. Tour discusses why chemical evolution couldn’t have happened.