BIOLOGY EXAM 2 - CHAPTERS (5),6,7 UPDATED
ACTUAL QUESTIONS AND CORRECT ANSWERS
Question:
1. Summarize the different roles lipids play in organisms and
give examples
Answer:
1.) Energy sources
2.) Storage
3.) stuctural
4.) cell to cell signaling
5.)Cell Chemistry
Question:
2. What are the structural features of a fatty acid?
Answer:
Chain of Carbons with a methyl group at on end and hydroxyl group at the
other
Question:
3.
Answer:
Methyl group
,Question:
4. Explain the difference between saturated and
unsaturated fatty acid?
Answer:
Saturated- No double bonds
Unsaturated- 1 or more double bonds (less hydrogen) have a kinck in them
Question:
5. Explain cis vs.trans double bond configurations... which is
most common in natural foods?
Answer:
Cis- Natural isomers, creates a bend in the molecule
TRANS- man made( food processing) they make vegetable oils more solid
produces as a biproduct increase heart disease #1 cause of death in
america, causes atherosclerosis ( accumulation of plaques on the inner walls
of arteries increases ) increases LDL ( Low density lipoprotein Cholesterol
Question:
6. What determines the omega number of a fatty acid?
Answer:
counting from the methyl end to the first double bond.
, Question:
7. What are the structural features of fats.
Answer:
3 fatty acids + 1 glycerol (glycerol is a hydroxyl group, founded at the ends,
it is a reactive chemical group, can attach to other molecules)
Question:
8. What is meant by saturated vs unsaturated fats.
Answer:
Saturated- Founded in meats, solid at room Temp( no double bounds.)
Unsaturated- Founded in fish and plants, liquid at Room T ( one or more
double bond less hydrogen)
Question:
9. What are oils?
Answer:
Unsaturated fats from fish or plants. Liquid at room temperature
Question:
10. What are the structural features of phospholipids and
why the are important in cells?
Answer:
Makes up animal cell membrane
made from 2 fatty acids+ 1 glycerol+1 phosphate + 1 additional chemical
The head is made Choline, the phosphate, glycerol, the tails are fatty acids
which is hydrophobic and the head id hydrophilic.
Question:
11. How does the cholesterol differ from that of a fat?
Answer:
A type of steroid, they contain 4 rings, it's also an alcohol.
ACTUAL QUESTIONS AND CORRECT ANSWERS
Question:
1. Summarize the different roles lipids play in organisms and
give examples
Answer:
1.) Energy sources
2.) Storage
3.) stuctural
4.) cell to cell signaling
5.)Cell Chemistry
Question:
2. What are the structural features of a fatty acid?
Answer:
Chain of Carbons with a methyl group at on end and hydroxyl group at the
other
Question:
3.
Answer:
Methyl group
,Question:
4. Explain the difference between saturated and
unsaturated fatty acid?
Answer:
Saturated- No double bonds
Unsaturated- 1 or more double bonds (less hydrogen) have a kinck in them
Question:
5. Explain cis vs.trans double bond configurations... which is
most common in natural foods?
Answer:
Cis- Natural isomers, creates a bend in the molecule
TRANS- man made( food processing) they make vegetable oils more solid
produces as a biproduct increase heart disease #1 cause of death in
america, causes atherosclerosis ( accumulation of plaques on the inner walls
of arteries increases ) increases LDL ( Low density lipoprotein Cholesterol
Question:
6. What determines the omega number of a fatty acid?
Answer:
counting from the methyl end to the first double bond.
, Question:
7. What are the structural features of fats.
Answer:
3 fatty acids + 1 glycerol (glycerol is a hydroxyl group, founded at the ends,
it is a reactive chemical group, can attach to other molecules)
Question:
8. What is meant by saturated vs unsaturated fats.
Answer:
Saturated- Founded in meats, solid at room Temp( no double bounds.)
Unsaturated- Founded in fish and plants, liquid at Room T ( one or more
double bond less hydrogen)
Question:
9. What are oils?
Answer:
Unsaturated fats from fish or plants. Liquid at room temperature
Question:
10. What are the structural features of phospholipids and
why the are important in cells?
Answer:
Makes up animal cell membrane
made from 2 fatty acids+ 1 glycerol+1 phosphate + 1 additional chemical
The head is made Choline, the phosphate, glycerol, the tails are fatty acids
which is hydrophobic and the head id hydrophilic.
Question:
11. How does the cholesterol differ from that of a fat?
Answer:
A type of steroid, they contain 4 rings, it's also an alcohol.
