Which of the following is the chemical formula for a fat: 1) C6H12O6 2) CH3(CH2)COOH 3) CH(NH2)COOH
Answer Number 2
Which picture (Top or Bottom) represents a saturated fatty acid? Be sure to explain why.
The picture on top is the saturated fatty acid because it is straight and has no double bonds.
Which picture (Top or Bottom) represents an unsaturated fatty acid? Be sure to explain why.
The picture on the bottom is the unsaturated fatty acid because it is bent due to a double bond between to carbon atoms.
Which of the following three foods is the best source of a saturated fatty acid known as stearic acid
The steak! Stearic acid is an animal fat used by muscles to store energy.
Which of the following, the Chicken or the Avocado, is the best source of an unsaturated fatty acid known as archiodonic acid?
The Avocado! Unsaturated fats are usually found in fruits, vegetables, nuts, and grains.
What kind of lipid molecue is this?
A triglyceride
What kind of lipid molecule is this?
A phospholipid. This is what the cell membrane is primarily made up of.
Arterioschlerosis is __________________ caused by __________________
a disease / too much fatty acids and cholesterol building up a plaque in the arteries of the heart.
This lipid is _________________
Cholesterol
What are the biological functions of triglycerides?
These large molecules are energy rich. They provide organisms with lots of calories to burn for fuel. They also make insulation like blubber.
How many types of fatty acids are in this triglyceride molecule?
1 saturated fat and 2 unsaturated fats
How can you describe the chemical properties associated with the heads and tails of phospholipids
The heads are charged and hydrophilic (water loving) while the tails have no charges and hydrophobic (water hating)
If 100,000 phospholipids are exposed to water, describe the shape and appearance the will take on.
They will form a hollow ball with the heads interacting with water on the outside and the inside of the hollow ball while tails "hide" from water.
What are hydrophobic molecules? Name two. Can they pass through the cell membrane?
Molecules without charges. Carbon Dioxide and Oxygen are examples. They will NOT get stuck on the heads and WILL dissolve into the fatty layer of cell membranes
True or False? Water will easily pass through this phospholipid bilayer.
False! Water is polar and will stick to the charged heads of phospholipids. Water will pass through protein tubes stuck in between the phospholipids.
What are the dark orange molecules in between the phospholipids? Why are they needed?
Those are cholesterol molecules. They give the plasma membrane added strength and flexibility.
