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IB Biology HL D1.2.16 Hl Alternative Splicing Questions

Alternative splicing joins different exon combinations from one pre-mRNA. In IB Biology HL D1.2.16, this lets one gene produce protein variants in different cells or stages.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Explain how alternative mRNA splicing can let a limited number of genes produce diverse proteins, including different antibody types.

IB Biology HL D1.2.16 Hl Alternative Splicing Questions question 1

[Maximum number: 1]

The number of protein-coding genes in the human genome is estimated to be about 20000 , which is much less than the size of the proteome. What is one reason for this?

A

Exons are removed from RNA before translation.

B

There are more types of amino acids than nucleotides.

C

mRNA can be spliced after transcription.

D

Base substitutions occur during transcription.

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