Protein Synthesis

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mohrbio

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Protein synthesis: 

Protein synthesis Section 4

Flow of Genetic Information: 

Flow of Genetic Information DNA RNA protein

RNA Structure and Function: 

RNA Structure and Function RNA is very similar to DNA – long strand of nucleotides

RNA Structure and Function: 

RNA Structure and Function RNA is different from DNA in the following ways: Contains the sugar ribose instead of deoxyribose Contains uracil instead of thymine Single-stranded Much shorter than DNA

Types of RNA: 

Types of RNA There are three major types of RNA that each plays a different role in protein synthesis

Types of RNA: 

Types of RNA Ribosomal RNA ( rRNA ) – makes up part of the ribosome

Types of RNA: 

Types of RNA Messenger RNA (mRNA) – carries the message from DNA in the nucleus to the ribosomes in the cytoplasm

Types of RNA: 

Types of RNA Transfer RNA ( tRNA ) – transfers amino acids to the ribosome to make a protein

The Genetic Code: 

The Genetic Code The genetic code is the rules for how a sequence of bases codes for a particular amino acid Each group of three nucleotides is called a codon and codes for an amino acid

The Genetic Code: 

The Genetic Code

Transcription: 

Transcription Instructions for a gene coded in DNA are rewritten into an RNA molecule

Translation: 

Translation Translation = the making of a protein

Steps of Translation: 

Steps of Translation 1. mRNA is fed through a ribosome three bases at a time

Steps of Translation: 

Steps of Translation 2. Molecules of tRNA translate the mRNA code by picking up a specific amino acid from the cytoplasm

Steps of Translation: 

Steps of Translation 3. In the ribosome, bases on the tRNA match with bases on the mRNA like pieces of a puzzle

Steps of Translation: 

Steps of Translation 4. tRNA releases their amino acids and they become linked in a chain