Transcription and Translation big mark questions

Created by: Zac102003
Created on: 11-12-20 11:41

Starting with mRNA in the cytoplasm, describe how translation leads to the production of a polypeptide.

Do not include descriptions of transcription and splicing in your answer. (5)

1- ribosome attaches to mRNA
2-ribosome moves to start codon - AUG
3- tRNA brings specific amino acid
4-Anticodon on tRNA complementary to codon on mRNA
5-ribosome 'fits' around two codons
6-process repeated and a.a. joined by peptide bonds in condensatio

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Describe how mRNA is produced in a plant cell. (5)

1-the DNA strands separate = H bonds broken
2- only one strand is used to make RNA
3- complementary base pairing A-U T-A C-G G-C
4- RNA nucleotides joined by RNA polymerase
5- pre-RNA formed
6-splicing = introns removed to form mRNA

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Messenger RNA (mRNA) is used during translation to form polypeptides.

Describe how mRNA is produced in the nucleus of a cell. (6)

1- Helicase 2- Breaks hydrogen bonds. 3- Only one DNA strand acts as template.
4- RNA nucleotides attracted to exposed bases
5- Complementary base pairing 6- RNA polymerase joins (RNA) nucleotides together
7- Pre-mRNA spliced to remove introns

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Explain how the structure of DNA is related to its functions. (6)

1- Sugar-phosphate (backbone) provides strength
2- Large molecule so can store lots of information
3- Helix / coiled so compact 4- base sequence codes for amino acids / protein;
5- Double stranded so S-CR can occur
6-weak H bonds for separation

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Starting with mRNA in the nucleus of a cell, describe how a molecule of protein is synthesised. (6)

1- mRNA leaves through nuclear pore 2-To ribosome 3- tRNA molecules bring amino acids
4- Specific tRNA molecule for specific amino acid 5.Anticodon of tRNA corresponds complementary to codon on mRNA 6- Peptide b. form between a.a. 7- tRNA detaches and

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Other cards in this set

Card 2

Front

Describe how mRNA is produced in a plant cell. (5)

Back

Card 3

Front

Messenger RNA (mRNA) is used during translation to form polypeptides.

Describe how mRNA is produced in the nucleus of a cell. (6)

Back

Card 4

Front

Explain how the structure of DNA is related to its functions. (6)

Back

Card 5

Front

Starting with mRNA in the nucleus of a cell, describe how a molecule of protein is synthesised. (6)

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Transcription and Translation big mark questions