Digestion
The two purposes of digestion are:
1. To break down nutrients
2. To absorb nutrients into the body
How does cold temperature affect enzymes?
Makes them work slower.
What is the job of carbohydrates in our body?
Main source of energy.
Which test do you use to test for fat?
Brown Paper test
Name an example of mechanical digestion.
Name an example of chemical digestion.
Mechanical digestion: chewing, peristalsis
Chemical digestion: saliva, acid, pancreatic enzymes, bile
How does boiling hot temperature affect enzymes?
It denatures enzymes (changes their shape) and then they no longer work.
What is the job of nucleic acids in our body?
Stores and transmits genetic information.
Which test do you use to test for starch?
Iodine test
What is the job of amylase?
Breaks down starches into sugars
How does having a lot of other types of molecules around affect enzymes?
It makes the enzymes work slower.
What are proteins made of?
Amino acids
If you put iodine on a piece of food and it looks yellow, that means that...
It doesn't contain starch.
What is the job of bile?
Breaks down fats.
How does warm temperature affect enzymes?
It makes them work faster.
How are polymers and monomers related to each other?
Polymers are made of many monomers.
Which test do you use to test for protein?
Biuret Test
How does the shape of the villi help them to do their job better?
The villi are like small hairs. This shape increases the surface area of the small intestine. More surface area allows for more absorption of nutrients.
If there are a lot of other molecules in a cell, how does an enzyme know which molecules to use?
Each enzyme is a different shape. It only works on substances that are the right shape to fit into the enzymes.
What monomers make up fat?
Glycerol and Fatty acids
How can you find out if food contains sugar?
It will turn orange if you do the Benedict's test.