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Biomolecules — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYBiomolecules3 Marks
Question
Ankita prepared hard for the test at home. All text based question and one practical based question on lock and key hypothesis was given to check whether the students had understood the phenomenon or not. Ankita who was a topper of class was the only student who was able to solve the problem. All others were unable to attempt the same. Teacher felt happy and asked Ankita to explain the process in the class.
  1. Who proposed the lock and key hypothesis?
  2. What is the nature of enzyme action?
  3. Why are enzymes also called biocatalyst?
  4. What values are reflected from Ankita's character?
  5. The hypothesis was given by Emil Fischer in 1894.
✓

Answer

  1. Each enzyme (E) has a substrate binding site(S) in order to form a highly reactive enzyme substrate complex(ES). The complex, so formed is short lived and dissociated into its product which results in the intermediate formation of the enzyme product complex(EP).
  2. Enzymes are also called biocatalysts because these are useful in catalysing biochemical reactions in ilving cells.
  3. Values reflected from Ankita's character was awareness about the process, attentive in class, critical thinking and seriousness about studies.

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