CBSE 2024 · Region 1 · Set 3 · Q18 · 2 marks
Given below is an illustration of the experiment performed by Louis Pasteur. Explain the experiment and its conclusion.

Marking-scheme solution
-In pre–sterilized flasks life did not come from killed yeast, while in another flask open to
air new living organisms arose from ‘killed yeast’.
Conclusion – Dismissal of theory of spontaneous generation / life arise from pre-existing life / proved theory of biogenesis
Molecular Basis of InheritanceTranslationUnderstandvery_short_answermedium
More from Molecular Basis of Inheritance
- Explain how the addition of lactose in the medium regulates the switching on of the lac operon in bacteria.2025 · asked 3×
- The type of bond represented by the dotted line '-----' in a schematic polynucleotide chain is:2024 · asked 3×
- Which of the options has correct identification of 'P', 'Q' and 'R' in the illustration of 'Central Dogma'…2024 · asked 3×
- Study the diagram given below and answer the questions that follows: Identify the structure shown in the…2025 · asked 3×
- What is a genetic code? Why did scientists feel the need to propose a genetic code? Genetic code is said to…2026 · asked 3×
- Assertion: Primary transcripts in eukaryotes are subjected to splicing to remove the introns. Reason (R):…2024 · asked 3×
- Given below is a heterogeneous RNA formed during Eukaryotic transcription: How many introns and exons…2025 · asked 3×
- Consider the given data of a hypothetical small portion of mRNA that codes for a functional polypeptide chain…2024 · asked 3×
CBSE Class 12 Biology past-paper question from the 2024board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.