L2- Biomolecules

Question 1

Four main classes of biological molecules

Answer 1

Carbohydrates
Nucleic Acids
Lipids
Proteins

Question 2

General formula for carbohydrates

Answer 2

(CH2O)n

Question 3

Functional properties of carbohydrates

Answer 3

Energy source (glucose)
Energy store (glycogen)

Question 4

Structural properties of carbohydrates

Answer 4

Part of cell wall (only in bacteria)

Question 5

Solubility of carbohydrates

Answer 5

Water soluble (hydrophilic, polar)

Question 6

Carbohydrates with 3 carbons

Answer 6

Triose

Question 7

Example of a triose

Answer 7

Glyceraldehyde

Dihydroxyacetone

Question 8

Carbohydrates with 5 carbons

Answer 8

Pentose

Question 9

Example of a pentose

Answer 9

Ribose

Question 10

Carbohydrates with six carbons

Answer 10

Hexose

Question 11

Example of hexose

Answer 11

Glucose

Fructose

Question 12

What is an aldose?

Answer 12

Monosaccharide that contains an aldehyde group

Question 13

What is a ketose?

Answer 13

Monosaccharide that contains a keto group

Question 14

What is an isomer?

Answer 14

Same chemical formula

Question 15

Percentage of hexose in linear form

Answer 15

<1%

Question 16

Carbon 1 is found at which landmark in carbohydrates

Answer 16

End of carbohydrate chain closest to the carbonyl group

Question 17

Linear ring structure to ring structure

Answer 17

Nucleophilic attack by lone pair of electrons of hydroxyl group on the carbonyl carbon ring create ring