23rd November, 2016 (CSAT)



A team of Canadian and American researchers has reached a step closer to developing effective treatments to prevent the brain from diseases like Alzheimer’s and Parkinson’s by identifying a gene that controls the normal and pathological aging of neurons in the central nervous system. The team has revealed that the BMI-1 gene, which is responsible for aging of neurons, has been identified in mice and in humans as well while they were carrying out experiments on mice. The researchers highlighted the fact that the primary risk factor for diseases like macular degeneration, Parkinson’s and Alzheimer’s is aging of neurons.

1. An assumption taken by researchers is that

(a) no significant study focused on the basic molecular mechanisms that control neuronal aging, has been conducted to date.

(b) the BMI-1 gene behaves in a similar fashion in humans as in mice.

(c) manipulating the BMI-1 gene could result in curing people suffering from Parkinson’s or Alzheimer’s.

(d) Neurons in the brain age at a slower rate as compared to other cells in the human body.


2. Roshan is taller than Hardik who is shorter than Sushil. Niza is taller than Harry but shorter than Hardik. Sushil is shorter than Roshan. Who is the tallest?

(a) Roshan

(b) Sushil

(c) Hardik

(d) Harry


Tomorrow: Next questions for practice

For previous questions refer yesterday’s post

Click on MAINS and PRELIMS pages also.