alleryA neurone's Nissl granules are destroyed by disease. Which function is lost first?
AProduction of proteins and enzymes
BGeneration of the cell's energy
CInsulation of the nerve fibre
DStorage of the genetic material
Answer & Solution
Correct answer: A. Production of proteins and enzymes
1. Nissl granules are the rough endoplasmic reticulum of the neurone.
2. Their job is the production of proteins and enzymes the cell needs.
3. Destroying them therefore stops that protein synthesis.
4. Energy generation belongs to the mitochondria, and candidates who mislabelled Nissl granules as mitochondria gave that answer wrongly.
5. Insulation is the myelin sheath's role and genetic storage the nucleus's, so neither is lost by damaging Nissl granules.
_Source: NECTA ACSEE 2022 Biology 133/1, Question 3: Coordination_
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