Carbohydrates & Lipids 1
Glucose is an example of a
a. monosacchride
b. disaccharide
c. polysaccharide
d. none of the above
monosaccharides because they are only one sugar molecule
What is the purpose of lipids?
a. pass down genetic information
b. breakdown wastes
c. store energy
d. are pigments for skin and hair
c. store energy
_________ are speed up chemical reactions
a. triglycerides
b. disaccharides
c. enzymes
d. ATP
enzymes
What is a monomer of a nucleic acid?
nucleotide
Macromolecules are made up of smaller parts called ________
monomers
True or False:
Saturated fats are found in liquid form at room temperature.
False
What are the monomers of a lipid?
glycerol and fatty acid
Write all the element that are found in nucleic acids but not in lipids.
Nitrogen and Phosphorus
Must have both answers to receive points.
What are the elements of protein?
C, H, O, N, and S
This is one job proteins do not have in the body.
a. structure for tissues and organs
b. insulation
c. transport things through cell membranes
d. help with immune systems
b. insulation
What is an example of a food that has lipids?
a. potatoes
b. bananas
c. lettuce
d. steak
d. steak
Starch (Breads, Rice, Crackers) is an example of which specific type of carbohydrate?
The answer must be complex carbohydrates or polysaccharides
Half credit cannot be given.
The indicator to test for proteins is placed on food and turns blue.
Must answer both questions.
- What is the indicator used to test for proteins?
- Does the food have protein?
Must have both answers correct. Half credit cannot be given.
- Indicator - Biuret
- No proteins in the food
What is the part of an amino acid that is made of 1 nitrogen atom bonded to two hydrogen atoms?
amino group
Hormones and cholesterol are examples of which macromolecule?
lipids
What is the ratio of C, H, and O found in carbohydrates?
1:2:1
Which of the following is an example of a disaccharide?
a. fructose
b. glucose
c. table sugar (sucrose)
d. starch
c. table sugar (sucrose)
What are the 3 parts of an amino acid?
carboxyl group, amino group, and R group
Must have all 3 answers to get the points.
Half credit cannot be given.
We have 20 different amino acids.
Which part of an amino acid makes one amino acid different from another amino acid?
R side chain
If iodine is placed on a food sample and it turns orange, which specific macromolecule is it testing for AND did the food sample have that macromolecule?
It's testing for complex carbohydrates OR polysaccharides AND it doesn't have the macromolecule.
Your answer isn't acceptable if you didn't answer both questions, or you just wrote carbohydrates.
Must have both answers correct. Half credit cannot be given.
A student is trying to test an unknown food sample to see if it has glucose.
Must answer both questions.
- What indicator will be used?
- What color will the indicator turn if there was glucose in the food?
- Glucose is a monosaccharide or simple carbohydrate which is tested using Benedict's solution
- Benedict's solution will turn red or orange
Must have both answers correct. Half credit cannot be given.
Multiple glucose molecules are bonded together to create a polysaccharide. The process of bonding the glucose together is called _________
dehydration synthesis
Give an example of a nucleic acid.
Either DNA or RNA are acceptable answers
What are the 3 parts of a nucleotide?
nitrogenous base, phosphate group, and a sugar
Must have all answers correct. Half credit cannot be given.
Kimberly tests a food to see which macromolecules are present. The biuret test showed a purple. After adding Sudan Red, red floating spots were seen. She places iodine on the food and it turns black. When a Benedict's solution was added to the food, it turned blue. Which macromolecule(s) are present in the food?
protein, lipids, complex carbohydrates
Must write all answers to receive points.
Half credit cannot be given.