Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signatuure
I declare this is my own work.
A-level Summer 2026
BIOLOGY Predicted
Paper 3
Afternoon Time allowed: 2 hours
Materials
For Examiner’s Use
For this paper you must have:
• a ruler with millimetre measurements Question Mark
• a scientific calculator.
1
Instructions 2
• Use black ink or black ball-point pen. 3
• Fill in the boxes at the top of this page. 4
• Answer all questions in Section A.
5
• Answer one question from Section B.
• You must answer the questions in the spaces provided. Do not write 6
outside the box around each page or on blank pages. 7
• If you need extra space for your answer(s), use the lined pages at the end of
TOTAL
this book. Write the question number against your answer(s).
• Show all your working.
• Do all rough work in this book. Cross through any work you do not want
to be marked.
Information
• The marks for the questions are shown in brackets.
• The maximum mark for this paper is 78.
7402/3
for more papers: tyrionpapers.com
, 2
Do not write
outside the
box
Section A
Answer all questions in the spaces provided.
You are advised to spend no more than 1 hour and 15 minutes on this section.
0 1 . 1 Complete the passage below by filling each numbered space with the correct
biological term.
Each type of RNA has a specific role in protein synthesis. The DNA code is
transcribed onto a single-stranded molecule called (1) which
leaves the nucleus and enters the cytoplasm. Messenger RNA contains
(2)
sequences of three bases called which code for specific
(3)
amino acids. Transfer RNA has a sequence called an that
(4)
pairs with the codon on mRNA. The ribosome, which contains ,
reads the sequence of codons and helps form (5) from amino
acids. The ribosome moves along the mRNA, bringing in new tRNA molecules
(6)
and using to join amino acids together.
[3 marks]
1
2
3
4
5
6
for more papers: tyrionpapers.com
, 3
Do not write
outside the
0 1 . 2 Table 1 shows differences between DNA, mRNA, and tRNA: box
Table 1
Nucleic Acid Pentose sugar Bases Shape
DNA Deoxyribose A,G,C,T Double shape
mRNA Ribose A,G,C,U Single helix
tRNA Ribose A,G,C,U Clover shape
Using the table, explain two ways in which tRNA is structurally suited to its function in
protein synthesis.
[2 marks]
0 1 . 3
Describe the role of RNA polymerase in transcription.
[2 marks]
for more papers: tyrionpapers.com
, 4
Do not write
outside the
box
0 1 . 4
Explain why splicing of pre-mRNA is necessary in eukaryotic cells.
[1 mark]
0 1 . 5
A sequence of DNA on the template strand is:
ATGCAAGTCCAG
If this pre-mRNA has no introns, how many amino acids will this sequence code
for?
[1 mark]
9
for more papers: tyrionpapers.com
Centre number Candidate number
Surname
Forename(s)
Candidate signatuure
I declare this is my own work.
A-level Summer 2026
BIOLOGY Predicted
Paper 3
Afternoon Time allowed: 2 hours
Materials
For Examiner’s Use
For this paper you must have:
• a ruler with millimetre measurements Question Mark
• a scientific calculator.
1
Instructions 2
• Use black ink or black ball-point pen. 3
• Fill in the boxes at the top of this page. 4
• Answer all questions in Section A.
5
• Answer one question from Section B.
• You must answer the questions in the spaces provided. Do not write 6
outside the box around each page or on blank pages. 7
• If you need extra space for your answer(s), use the lined pages at the end of
TOTAL
this book. Write the question number against your answer(s).
• Show all your working.
• Do all rough work in this book. Cross through any work you do not want
to be marked.
Information
• The marks for the questions are shown in brackets.
• The maximum mark for this paper is 78.
7402/3
for more papers: tyrionpapers.com
, 2
Do not write
outside the
box
Section A
Answer all questions in the spaces provided.
You are advised to spend no more than 1 hour and 15 minutes on this section.
0 1 . 1 Complete the passage below by filling each numbered space with the correct
biological term.
Each type of RNA has a specific role in protein synthesis. The DNA code is
transcribed onto a single-stranded molecule called (1) which
leaves the nucleus and enters the cytoplasm. Messenger RNA contains
(2)
sequences of three bases called which code for specific
(3)
amino acids. Transfer RNA has a sequence called an that
(4)
pairs with the codon on mRNA. The ribosome, which contains ,
reads the sequence of codons and helps form (5) from amino
acids. The ribosome moves along the mRNA, bringing in new tRNA molecules
(6)
and using to join amino acids together.
[3 marks]
1
2
3
4
5
6
for more papers: tyrionpapers.com
, 3
Do not write
outside the
0 1 . 2 Table 1 shows differences between DNA, mRNA, and tRNA: box
Table 1
Nucleic Acid Pentose sugar Bases Shape
DNA Deoxyribose A,G,C,T Double shape
mRNA Ribose A,G,C,U Single helix
tRNA Ribose A,G,C,U Clover shape
Using the table, explain two ways in which tRNA is structurally suited to its function in
protein synthesis.
[2 marks]
0 1 . 3
Describe the role of RNA polymerase in transcription.
[2 marks]
for more papers: tyrionpapers.com
, 4
Do not write
outside the
box
0 1 . 4
Explain why splicing of pre-mRNA is necessary in eukaryotic cells.
[1 mark]
0 1 . 5
A sequence of DNA on the template strand is:
ATGCAAGTCCAG
If this pre-mRNA has no introns, how many amino acids will this sequence code
for?
[1 mark]
9
for more papers: tyrionpapers.com
