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Practice MCQ Questions and answers on Biology-GK

Learn and practice General Knowledge questions and answers on Biology with very easy and understandable explanations. GK questions are very helpful different type of competitive exams. Page-6 section-1

Each section contains 100 MCQs on Biology .
51
Pigmentation of skin is due to
Discuss
Answer & Solution
Answer: Option D
Solution:
A common cause of hyperpigmentation is an excess production of melanin. Melanin is a pigment that gives skin its color. It's produced by skin cells called melanocytes.
52
Norepinephrine increases
Discuss
Answer & Solution
Answer: Option D
Solution:
Together with adrenaline, norepinephrine increases heart rate and blood pumping from the heart. It also increases blood pressure and helps break down fat and increase blood sugar levels to provide more energy to the body.
53
Night blindness is cause by lack of which vitamin?
Discuss
Answer & Solution
Answer: Option A
Solution:
Night blindness is caused by lack of vitamin A.
54
Monocot root differs from dicot root in having
Discuss
Answer & Solution
Answer: Option C
Solution:
In dicot root, well developed pith is absent. In monocot root, well developed pith is present.
55
Radioactivity is a phenomenon of the spontaneous emission of
Discuss
Answer & Solution
Answer: Option D
Solution:
Radioactivity is a phenomenon of the spontaneous emission of protons, electrons and gamma rays.
56
Organic Substances which, in very small amounts, control growth and development called
Discuss
Answer & Solution
Answer: Option B
Solution:
Organic Substances which, in very small amounts, control growth and development called hormones.
57
Our major foods, fibres, spices, fruits and beverage crops are
Discuss
Answer & Solution
Answer: Option A
Solution:
Our major foods, fibres, spices, fruits and beverage crops are flowering plants.
58
Movements due to light are shown by
Discuss
Answer & Solution
Answer: Option A
Solution:
Flowering plants show the movement due to light.
59
Outer covering of virus made up of protein is
Discuss
Answer & Solution
Answer: Option A
Solution:
A capsid is the protein shell of a virus, enclosing its genetic material. The proteins making up the capsid are called capsid proteins or viral coat proteins (VCP).
60
Radish is a
Discuss
Answer & Solution
Answer: Option C
Solution:
Radish is a modified root.