#37 Summary of Genetic control

1. DNA and RNA are polynucleotides, made up of long chains of nucleotides.

2. A nucleotide contains a pentose sugar, a phosphate group and a nitrogen-containing base. In RNA the sugar is ribose, and in DNA it is deoxyribose.

# 36 Gene mutation, sickle cell anaemia

A gene mutation is a change in the sequence of nucleotides that may result in an altered polypeptide.

# 35 The genetic code - protein synthesis

The genetic code specifies the amino acids that are assembled to make polypeptides. The way that DNA codes for polypeptides is central to our understanding of how cells and organisms function.

# 34 DNA structurer and replication

DNA molecule consists of nucleotides in which the sugar component is deoxyribose whereas the RNA molecule has nucleotides in which the sugar is a ribose.

# 33.2 Nucleic acids and protein synthesis - Syllabus 2016 - 2018

6.1 Structure and replication of DNA
6.2 Protein synthesis 

# 33.1 Nucleic acids and protein synthesis - Syllabus 2015

• Structure and replication of DNA
• Role of DNA in protein synthesis