Practice 2.7 DNA replication, transcription and translation with authentic IB Biology exam questions for both SL and HL students. This question bank mirrors Paper 1A, 1B, 2 structure, covering key topics like cell biology, genetics, and ecology. Get instant solutions, detailed explanations, and build exam confidence with questions in the style of IB examiners.
Paper
Level
Question 1
SLPaper 1A
Which of the following involves complementary base pairing?
I. Transcription II. Translation III. Replication IV. Denaturation
Question 2
HLPaper 1A
Which DNA has identical base pair sequences?
I. DNA that segregates during mitosis
II. DNA that segregates during meiosis I
III. DNA that segregates during meiosis II
Question 3
HLPaper 2
1.[4]
Draw a labelled diagram of the ultrastructure of a prokaryote.
2.[8]
Explain the process of DNA replication.
3.[6]
Outline how the structure of the ribosome is related to its function in translation.
Question 4
SLPaper 2
1.[5]
Describe the genetic code and its relationship to polypeptides and proteins.
2.[5]
Outline the role of proteins in active and passive transport of molecules through membranes.
3.[8]
Many cell functions, like synthesis of macromolecules and transport, require energy in the form of ATP. Explain how ATP is generated in animal cells.
Question 5
HLPaper 2
The electron micrograph below shows part of several pancreatic islet cells. 
1.[3]
Identify the structures labelled I, II and III in the micrograph above and give a role for each one.
2.[1]
Using the letter A, identify one location on the micrograph where transcription takes place.
3.[1]
Using the letter B, identify one location on the micrograph where chemiosmosis occurs.
4.[1]
Suggest what product each cell is likely to be making.
5.[2]
Explain how the products are transported from the site of production and released from the islet cells.
Question 6
HLPaper 1A
This DNA sequence was used to synthesize a polypeptide.
DNA (sense strand): TACTGA
DNA (template strand): ATGACT
Which are the bases of the tRNA (anticodons)?
Question 7
HLPaper 1A
What does the universal nature of the genetic code allow?
Question 8
HLPaper 1A
According to the induced fit model of enzyme function, which of the following statements is correct?
Question 9
SLPaper 1A
What provides evidence for the universal nature of the genetic code?
Question 10
HLPaper 1A
During modification in eukaryotes, mRNA is spliced. What is splicing of mRNA?