2.7 IB Transcription, Translation and Protein Synthesis

What process is going on in this photo? 

• Transcription 
• Translation 
• Replication 
• All the above 

Answer explanation

This is translation as the mRNA code is being translated by the ribosome into the primary amino acid sequence.

Tags

NGSS.HS-LS1-1

Translation is the process where.....

• mRNA is created in the Nucleus
• mRNA is decoded to form a protein 
• glucose molecules are made
• is where lipids are synthesised

Answer explanation

How many amino acids are coded for by this sequence of nucleotides:
ATG GGA ACT CCA

• 4
• 2
• 6
• 12

Answer explanation

Remember, a sequence of 3 bases code for each amino acid.

Tags

NGSS.HS-LS1-1

The amino acid sequence of a polypeptide chain creates the _________ structure of the protein.

• Primary
• Secondary
• Tertiary
• Quaternary

Answer explanation

The primary sequence is the order of amino acids.

Tags

NGSS.HS-LS1-1

The enzyme that produces mRNA in transcription is called....

• RNA Polymerase
• DNA Polymerase
• Transcriptase
• RNA Intrase

Answer explanation

It makes sense it would be called transcriptase as the name is related to its function, making the molecule that is transcribed - mRNA.

RNA is read in sections called......

• Triplets
• Genes
• Codons
• Genes

Answer explanation

The CODE is on the CODON!

Transcription is a process that in eukaryotic cells takes place in the.......

• Nucleus
• Cytoplasm
• Golgi Apparatus
• Rough E.R.

Answer explanation

Transcription happens in the nucleus as it is the DNA that is being transcribed and DNA is only found in the nucleus.

Tags

NGSS.HS-LS1-1

RNA polymerase builds RNA in the _________ direction

• 5' to 3'
• 3' to 5'
• both directions
• any direction

Answer explanation

Just like DNA, RNA is built in the 5'-3' direction.

Translation is a process in eukaryotic cells that takes place in the.......

• Cytoplasm
• Nucleus
• Nucleolus
• Golgi Bodies

Answer explanation

Translation is where the mRNA code is translated into the amino acid sequence. So this must happen at the ribosome in the cytoplasm.

The codon 5'-UAC-3' would have an anti-codon match of

• 3'-AUG-5'
• 3'-TAC-5'
• 5'-AUG-3'
• 5'-CAU-3'

Answer explanation

Take your time on these questions and really think about them.

Tags

NGSS.HS-LS1-1