Lipids - Roles Of Triglycerides

Question 1

What are triglycerides more commonly known as?

2

Answer 1

Fats

Oils

Question 2

What is the main difference between fats and oils?

Answer 2

Fats are solid at room temp

Oils are liquid at room temp

Question 3

Why do fats and oils have a different state at room temp?

Answer 3

The different in state is due to the presence of double bonds between carbon atoms in the fatty acid tail

Question 4

What makes a fatty acid saturated?

Answer 4

There are no double bonds between carbon atoms in the hydrocarbon chains

Question 5

What makes a fatty acid monounsaturated?

Answer 5

There is 1 double bond between carbon atoms in the hydrocarbon chains

Question 6

What makes a fatty acid polyunsaturated?

Answer 6

There are many double bonds between carbon atoms in the hydrocarbon chains

Question 7

Why do the unsaturated hydrocarbon chain bend?

Answer 7

Because of the carbon double bonds

Question 8

What does the bending of the unsaturated hydrocarbon chains cause to happen?

Or

Why are unsaturated triglycerides liquid at room temp?

Answer 8

The bending pushes the unsaturated triglyceride molecules further apart than the saturated molecules

This weakens the intermolecular forces between the unsaturated triglyceride molecules so they form a liquid at room temp

Question 9

Are fats saturated or unsaturated?

Answer 9

Saturated

Question 10

Are oils saturated or unsaturated?

Answer 10

Unsaturated

Question 11

What can triglycerides replace is respiration?

Answer 11

Glucose

Question 12

What do triglycerides release a lot of in respiration?

Answer 12

Energy

Question 13

Why does triglycerides release a lot of energy in respiration?

Answer 13

Due to the large number of carbon hydrogen bonds which are broken down

Question 14

What reactions is triglycerides found in?

1

Answer 14

Metabolic reactions

Question 15

What is triglyceride a good source of in metabolic reactions?

Answer 15

Water

Question 16

Why is triglyceride a good source of water in metabolic reactions?

Answer 16

Because water is released when the components of triglycerides are broken down in respiration

Question 17

Why are triglycerides excellent molecules for energy stores?

2

Answer 17

They provide the most energy per unit of mass of any storage molecule

They are large and non-polar so are insoluble in water

Question 18

Triglycerides

Why is providing the most energy per unit of mass of any storage molecule useful?

Answer 18

This is useful for animals as it reduces the mass that must be carried around

Question 19

Why is triglycerides being insoluble in water useful?

Answer 19

So they don’t affect the osmotic balance of cells in the body

Question 20

What useful properties do triglycerides have?

Answer 20

Oils repel water so aquatic animals produce oil to waterproof their fur

Fats are used by animals for thermal insulation

Fats used by animals to protect internal organs

Fats less dense than water so they aid in buoyancy for aquatic animals