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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-3 section-3

Each section contains 100 MCQs on Biology .
21
Which one of following is smallest gland of body?
Discuss
Answer & Solution
Answer: Option C
Solution:
Pituitary is smallest gland of body among the following.
22
Deficiency of which minerals causes goitre?
Discuss
Answer & Solution
Answer: Option C
Solution:
Deficiency of iodine causes goitre.
23
Chemical co-ordination in the body is brought out by
Discuss
Answer & Solution
Answer: Option D
Solution:
In vertebrates the chemical coordination is brought about by endocrine glands which secrete hormones.
24
The disease Goitre is caused in persons who do not have in their diet sufficient
Discuss
Answer & Solution
Answer: Option C
Solution:
Goitre is caused in persons who do not have sufficient iodine in their diet.
25
In case of a heart attack, a hormone is injected as an emergency measure, Which one is it?
Discuss
Answer & Solution
Answer: Option B
Solution:
In the case of a heart attack, the hormone that injected as an emergency measure is Adrenaline. An adrenaline shot can increase the chance that the heart will regain a normal rhythm or restart your heart after a cardiac arrest by directing the flow of blood to the heart.
26
Which of the following hormone is called the emergency hormone ?
Discuss
Answer & Solution
Answer: Option B
Solution:
Adrenaline, also known as epinephrine, is a hormone and medication. Adrenaline is normally produced by both the adrenal glands and a small number of neurons in the medulla oblongata, where it acts as a neurotransmitter involved in regulating visceral functions.
27
Which cells secrete hormones?
Discuss
Answer & Solution
Answer: Option D
Solution:
Glands secrete hormones.
28
Insulin is secreted from which gland or organ of human body?
Discuss
Answer & Solution
Answer: Option D
Solution:
The most important hormone that the pancreas produces is insulin. Insulin is released by the 'beta cells' in the islets of Langerhans in response to food.
29
Which one of the following crops would be preferred for sowing in order to enrich soil with nitrogen?
Discuss
Answer & Solution
Answer: Option D
Solution:
The "gram crops" would be preferred for sowing in order to enrich the "soil with nitrogen".
30
Censor mechanism of dispersal of seeds is found in
Discuss
Answer & Solution
Answer: Option B
Solution:
Censor mechanism of seed dispersal is a type of dispersal by wind, which generally occur in poppy. Its seeds bear hairy fibers outside and are very light in weight, which aid in easy dispersal by wind.