Biochemistry Lipids Quiz

20 Questions | By Astosich | Updated: Jul 3, 2022 | Attempts: 13681

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Check out our amazing biochemistry quiz designed to test how much you know about lipids. You must have studied fats and lipids in your biochemistry chapters. It's time to check your knowledge regarding the same. Lipids are macro biomolecules that are insoluble in water but soluble in non-polar solvents like alcohol and ether. The following quiz also contains questions related to fats or oils. So, give it a try and expand your memory about lipids.

Questions and Answers

1.

The basic backbone of most fat or oil molecules is an alcohol called....
- A.
  
  Glycerol
- B.
  
  Glycerin
- C.
  
  Glyceric acid
- D.
  
  Glycogen
2.

Which of these statements best describes the composition of Lipids?
- A.
  
  C, H, O in a 1:2:1 Ratio
- B.
  
  C, H, O, N, P all present
- C.
  
  C, H, O in no specific ratio
- D.
  
  C, H, O, S
3.

Which of the following functional groups would be found in typical lipids?
- A.
  
  Carboxyl -COOH (O=C-O-H)
- B.
  
  Hydroxyl -OH
- C.
  
  Carbonyl -C=O
- D.
  
  All of these are possible
4.

The image below shows a molecule of Octanoic Acid. Which type of molecule is it?
- A.
  
  An alcohol
- B.
  
  An unsaturated fatty acid
- C.
  
  A saturated fatty acid
- D.
  
  None of the above mentioned
5.

Which of the following would be true of this molecule?
- A.
  
  It is a triglyceride fat
- B.
  
  It is most likely liquid at room temperature
- C.
  
  It is most likely a solid at room temperature
- D.
  
  Only a & b
- E.
  
  Only a & c
6.

Which of these statements best describes these molecules?
- A.
  
  They are both fatty acids.
- B.
  
  They are both saturated fatty acids.
- C.
  
  The top one is an unsaturated fatty acid; the lower one is saturated.
- D.
  
  The top one is a saturated fatty acid; the lower one is polyunsaturated.
- E.
  
  They are both unsaturated fatty acids.
7.

Which of these is NOT a typical role for lipids in a living organism?
- A.
  
  Provide stored energy reserves
- B.
  
  Form a structural component of cell membranes & many tissues
- C.
  
  A source of glucose, when broken down
- D.
  
  A material from which hormones can be produced
- E.
  
  Protection of internal organs, insulation beneath skin
8.

This is a molecule of Linoleic acid. Which statement best describes it?
- A.
  
  It is an unsaturated fatty acid.
- B.
  
  It is a saturated fatty acid.
- C.
  
  It is a triglyceride fat.
- D.
  
  It is a sterol.
9.

Which molecule is shown below?
- A.
  
  Triglyceride
- B.
  
  Fatty acid
- C.
  
  Cholesterol
- D.
  
  Glycerol
10.

Examine the diagram below, showing a phospholipid. The areas labelled A, B, C, D are (in order...)...
- A.
  
  Protein, phosphate, carbohydrate, lipid
- B.
  
  Phosphate, glycerol, carbohydrate, fatty acids
- C.
  
  Amino acid residue, phosphate group, glycerol, fatty acids
- D.
  
  Fatty acids, phosphate, carbohydrate, hydrocarbon
- E.
  
  Amino acid residue, fatty acid, glycerol, phosphate
11.

The main role of phospholipids in living cells is to...
- A.
  
  Store energy for future nutritional leads
- B.
  
  Make the cell wall in plant cells
- C.
  
  Make insect exoskeletons
- D.
  
  Form cell membranes in all eukaryotic cells
- E.
  
  Form the basis of many hormones
12.

Examine the image of a phospholipid, below. Note that some areas are labelled hydrophobic, and others are hydrophilic. What is the term we use for molecules, like this one, that have both properties?
- A.
  
  Hydrogenous
- B.
  
  Ambivalent
- C.
  
  Amphoteric
- D.
  
  Ambidextrous
- E.
  
  Antipasto
13.

In an aqueous environment, phospholipids will form which of the following?
- A.
  
  Micelles
- B.
  
  Liposomes
- C.
  
  Bilayers
- D.
  
  All of the above
- E.
  
  Only a & c
14.

Which of the following common materials behaves as an amphoteric molecule?
- A.
  
  Olive oil
- B.
  
  Detergent
- C.
  
  Lard
- D.
  
  Fat
15.

The first cells likely developed from spontaneous associations of phospholipids, called....?
- A.
  
  Liposomes
- B.
  
  Micelles
- C.
  
  Macrophages
- D.
  
  Lipoproteins
- E.
  
  Microlipids
16.

All plant lipids are liquids, or oils.
- A.
  
  True
- B.
  
  False
17.

Lipids and carbohydrates have virtually the same composition.
- A.
  
  True
- B.
  
  False
18.

When lipids are being digested, the cell uses up one water molecule.
- A.
  
  True
- B.
  
  False
19.

Which of the following best describes the formation of lipids?
- A.
  
  Isomerization
- B.
  
  Polymerization
- C.
  
  Dehydration synthesis
- D.
  
  Ammonification
20.

The breakdown of lipids involves the breaking of a bond using water. This is a process called...?
- A.
  
  Hydration
- B.
  
  Dehydration
- C.
  
  Hydrophobia
- D.
  
  Hydrophilia
- E.
  
  Hydrolysis