Question : Grey hair is caused due to
Option 1: ageing of epidermal cells
Option 2: death of dermal cells
Option 3: loss of sebum in epidermal cells
Option 4: loss of melanin in epidermal cells
Correct Answer: loss of melanin in epidermal cells
Solution : The correct option is the loss of melanin in epidermal cells.
Grey hair is produced by a reduction in melanin synthesis inside hair follicles. Melanin is the pigment that gives our hair, skin, and eyes their colour. As we age, the melanocyte cells within our hair follicles generate less melanin, resulting in a decrease in pigment. This loss of pigment causes hair strands to lose their colour, and appear grey or white.
Application | Eligibility | Selection Process | Result | Cutoff | Admit Card | Preparation Tips
Question : Directions: Which option represents the correct order of the given words as they would appear in the English dictionary? 1. Measurement 2. Methodology 3. Melanin 4. Metaphor 5. Meritorious
Option 1: 3, 1, 5, 4, 2
Option 2: 1, 3, 5, 4, 2
Option 3: 1, 4, 2, 5, 3
Option 4: 1, 5, 3, 2, 4
Question : Acid rain is caused due to pollution of the atmosphere by:
Option 1: oxides of Carbon and Nitrogen
Option 2: oxides of Nitrogen and Sulphur
Option 3: oxides of Nitrogen and Phosphorous
Option 4: None of these
Question : The main function of centriole is:
Option 1: to help plant cells with multiplication
Option 2: to help cell division in animal cells
Option 3: to maintain rigidity in plant cell
Option 4: to maintain mineral composition in bacterial cell
Question : Leukaemia or blood cancer is characterised by abnormal increase of the
Option 1: Red Blood Cells
Option 2: White Blood Cells
Option 3: Blood platelets
Option 4: Blood plasma
Question : Which of the following proteins is found in hair?
Option 1: Histone
Option 2: Keratin
Option 3: Elastin
Option 4: Actin
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile