Topic 2.3 - Lipids

Question 1

What is a lipid’s smallest sub-unit ?

Answer 1

Triglycerides

Question 2

What are the three types of lipids ?

Answer 2

Triglycerides, Phospholipids and Steroids

Question 3

What is the structure of a carboxyl group ?

Answer 3

COOH
OH - C = O

Question 4

What makes a saturated fat saturated ?

Answer 4

All the carbon atoms in the chain are linked to each other by single covalent bonds.

Question 5

What are all the types of fatty acids ?

Answer 5

Unsaturated fats, saturated fats, trans unsaturated fats and cis unsaturated fats.

Question 6

What are trans and cis unsaturated fats ?

Answer 6

Trans unsaturated fats are fats which have hydrogen atoms bonded on opposite sides of the double bond whereas cis have are on the same side.

Question 7

What are lipids’ main function ?

Answer 7

Energy storage

Question 8

How do we calculate BMI (give the formula) ?

Answer 8

BMI = Mass in kg / height in metres squared

Question 9

Which fatty acids present health risks if overconsumed ?

Answer 9

Trans fats and saturated fatty acids

Question 10

What are the bonds that link fatty acids together ?

Answer 10

Ester bonds

Question 11

Give limitations for BMI

Answer 11

Athletic profile (muscle mass), water retention, ethnicity, heavy bones…