IB Biology SL D1.2.1 Transcription Questions
Explore template-strand selection, complementary RNA pairing and the distinction between transcription and translation in IB Biology SL D1.2.1.
- Syllabus
- First assessment 2025
- Course
- Biology SL
- Level
- SL
Exam points
- Explain transcription as RNA polymerase copying a DNA template to synthesize a complementary mRNA molecule.
- Use template-strand selection and complementary RNA base pairing to identify the RNA product of transcription.
- Distinguish transcription from translation by the molecule produced and the DNA-template versus ribosome process.
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IB Biology SL D1.2.1 Transcription Questions 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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