What Did You Learn About Lipids?

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| By Beus

Beus

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Quizzes Created: 1 | Total Attempts: 292

Questions: 7 | Attempts: 292 | Updated: Mar 21, 2023

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After our presentation, you will have a quiz to take to see how much you learned. For some questions, more than one answer is available.

Questions and Answers

1.

When do lipids have a double bond?
- A.
  
  When they're unsaturated
- B.
  
  When they're saturated
- C.
  
  When they're fatty acids
- D.
  
  When they're steroids
Correct Answer
B. When they're saturated

Explanation
Lipids have a double bond when they are unsaturated, not when they are saturated. Unsaturated lipids have one or more double bonds in their fatty acid chains, which cause the molecules to have kinks and prevent them from packing tightly together. In contrast, saturated lipids have no double bonds and their fatty acid chains are fully saturated with hydrogen atoms, resulting in a straight, rigid structure. Therefore, lipids with double bonds are considered unsaturated, not saturated.

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2.

Lipids...
- A.
  
  Kill viruses
- B.
  
  Store energy
- C.
  
  Make you get tanner
- D.
  
  Help prevent injury to vital organs
Correct Answer(s)
B. Store energy
D. Help prevent injury to vital organs

Explanation
Lipids are a diverse group of molecules that serve various functions in the body. One of their primary roles is to store energy. Lipids, such as triglycerides, store energy in the form of fat, which can be utilized by the body when needed. Additionally, lipids also play a crucial role in protecting vital organs. They form a protective layer around organs, acting as a cushion and helping to prevent injury.

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3.

Lipids are soluble in...
- A.
  
  Water
- B.
  
  Coke
- C.
  
  Ether
- D.
  
  Chloroform
Correct Answer(s)
C. Ether
D. Chloroform

Explanation
Lipids are not soluble in water because they are hydrophobic, meaning they repel water. However, they are soluble in organic solvents such as ether and chloroform. These solvents have nonpolar characteristics that allow them to dissolve lipids, which are also nonpolar in nature.

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4.

Two types of lipids are...
- A.
  
  Steroids and proteins
- B.
  
  Fatty acids and nucleic acids
- C.
  
  Fatty acids and steroids
- D.
  
  Proteins and enzymes
Correct Answer
C. Fatty acids and steroids

Explanation
Fatty acids and steroids are two types of lipids. Fatty acids are long chains of hydrocarbons with a carboxyl group at one end, and they are important for energy storage and membrane structure. Steroids, on the other hand, are a class of lipids with a specific four-ring structure, and they have various physiological functions such as hormone regulation and membrane fluidity. Therefore, the correct answer is fatty acids and steroids.

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5.

What are oils made of?
- A.
  
  Dehydration synthesis
- B.
  
  Lipids
- C.
  
  Fatty acids
- D.
  
  Glycerol
Correct Answer(s)
A. Dehydration synthesis
C. Fatty acids
D. Glycerol

Explanation
Oils are made up of lipids, which are organic compounds that are insoluble in water. Lipids consist of fatty acids and glycerol. Dehydration synthesis refers to the chemical reaction that occurs when a molecule of water is removed to join two smaller molecules together, such as in the formation of a lipid molecule. Therefore, all three options - dehydration synthesis, fatty acids, and glycerol - are correct explanations for what oils are made of.

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6.

What are lipids?
7.

Lipids contain three elements. Briefly explain what they are.

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Current Version
Mar 21, 2023

Quiz Edited by
ProProfs Editorial Team
Nov 01, 2009

Quiz Created by
Beus

What Did You Learn About Lipids?

When do lipids have a double bond?

Lipids...

Lipids are soluble in...

Two types of lipids are...

What are oils made of?

What are lipids?

Lipids contain three elements. Briefly explain what they are.