IB Biology SL 1.2.1 Transcription Question Bank
Practise IB Biology SL 1.2.1 by outlining transcription and explaining how RNA polymerase produces a complementary mRNA strand.
- Syllabus
- First assessment 2025
- Course
- Biology SL
- Level
- SL
Exam points
- Outline the stages of transcription from a DNA template to an mRNA molecule.
- Explain the role of RNA polymerase and complementary base pairing during transcription.
- Distinguish transcription from translation using the molecule produced and the cellular process.
D1.2.1—Transcription question 1
[Maximum number: 4]
Mitosis produces genetically identical cells, which become specialized by expressing specific genes. This ensures that tissues and organs are adapted to their functions.
Describe how mRNA is produced in the nucleus.
a. RNA polymerase unwinds/unzips DNA / breaks hydrogen bonds;
b. (DNA) template/antisense strand is used;
c. (free) RNA nucleotides added (to DNA);
d. (by) complementary base pairing / A-U AND G-C;
e. RNA polymerase joins/attaches (RNA) nucleotides (on new mRNA strand)/forms (phosphodiester) bonds;
f. RNA polymerase/mRNA strand detaches/DNA strands reattach OR
RNA polymerase reach the stop codon;
4
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