Organic Chemistry

Question 1

What is the function of DNA?

Answer 1

Encodes genetic instructions for development and functioning of living organisms

Question 2

What is the structure of DNA?

Answer 2

2 polymer chains made from 4 different monomers called nucleotides

Question 3

What is a protein?

Answer 3

Polymers of different amino acids

Question 4

Explain fractional distillation

Answer 4

Heated crude oil enters a tall fractionating column, which is hot at the bottom and gets cooler towards the top
Vapours from the oil rise through the column
Vapours condense when they become cool enough
Liquids are led out of the column

Question 5

What does saturated and unsaturated mean?

Answer 5

Saturated- Contains single covalent bonds
Unsaturated- Contains more than one covalent bond

Question 6

What is the general formula for alkanes

Answer 6

CnH2n+2

Question 7

What is the general formula for alkenes

Answer 7

CnH2n

Question 8

How do you test for an alkane or alkene?

Answer 8

Bromine water goes colourless with an alkene
Bromine water stays orange with an alkane

Question 9

What is the structure and bonding of carbon dioxide, magnesium oxide and silicon dioxide?

Answer 9

Carbon dioxide and silicon dioxide are made up of normal atoms while magnesium oxide is formed from ions
Silicon dioxide and magnesium oxide form giant structures while carbon dioxide forms small structures
They all have weak IMF
Carbon dioxide has double bonds, while silicon dioxide is made of single bonds