Biological molecules

Question 1

What type of fatty acid has atleast one double bond between carbon atoms?

Answer 1

Unsaturated

Question 2

What elements do lipids contain?

Answer 2

Carbon, hydrogen and oxygen

Question 3

What is attached to the three fatty acids in a triglyceride?

Answer 3

Glycerol molecule

Question 4

What is esterification?

Answer 4

Process of triglycerides being synthesised- ester bonds form

Question 5

What makes fatty acids insoluble?

Answer 5

They have a hydrophobic tail so repel water

Question 6

How are phospholipids different to triglycerides ?

Answer 6

One of the fatty acid molecules is replaced by a phosphate group

Question 7

What is cholesterol a type of?

Answer 7

Lipid

Question 8

What make up carbohydrates?

Answer 8

Polymers or Monosaccharides

Question 9

What are monosaccharides (carbohydrates) joined by?

Answer 9

Glycosidic bonds

Question 10

Three examples of monosaccharide carbohydrates?

Answer 10

Alpha glucose
Beta glucose
Ribose

Question 11

What is one use of starch?

Answer 11

Main energy storage material in plants

Question 12

Two examples of starch

Answer 12

Amylose and Amylopectin

Question 13

What is one use of glycogen?

Answer 13

The main storage material in animals

Question 14

Why is glycogen good for storing glucose?

Answer 14

Has lots of side branches so glucose can be released quickly

Question 15

Three examples of polysaccharide carbohydrates

Answer 15

Starch, glycogen and cellulose

Question 16

What is cellulose used for?

Answer 16

Major part of cell walls in plants

Question 17

What is cellulose made up of?

Answer 17

Unbranched chains of beta glucose

Question 18

What kind of bonds join beta glucose chains in cellulose?

Answer 18

Hydrogen bonds

Question 19

Do saturated fatty acids have any double bonds between their carbon atoms?

Answer 19

No