1. In the human body, which of the following is ductless gland?
(a) Liver
(b) Sweat gland
(c) Endocrine glands
(d) Kidney
[M.P.P.C.S. (Pre) 1993]
Ans. (c) Endocrine glands
- Endocrine glands are special glands that don’t have ducts.
- Instead, they release hormones directly into the bloodstream.
- Some of the major endocrine glands are :
- The pineal gland
- Pituitary gland
- Thymus
- Thyroid gland
- Parathyroid gland
- Adrenal glands
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2. Which is the smallest endocrine gland in the human body ?
(a) Adrenal
(b) Thyroid
(c) Pancreas
(d) Pituitary
[U.P.P.C.S. (Pre) 1996]
Ans. (d) Pituitary
- The pituitary gland is the smallest endocrine gland in the human body.
- It is about the size of a pea and weighs 0.5 gram.
- It is known as the ‘master gland’ because it controls the activity of other endocrine glands.
- It is also called the hypophysis cerebri.
- The smallest endocrine gland is the pineal gland, it is cone-shaped and 7.5 mm in size.
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3. Which of the following glands in human body acts both as an endocrine gland as well as an exocrine gland?
(a) Adrenal gland
(b) Lacrimal gland
(c) Pancreas
(d) Thyroid
[U.P.P.C.S. (Pre) 2019]
Ans. (c) Pancreas
- The pancreas is a special type of gland that works both as an endocrine and exocrine gland.
- As an endocrine gland, it helps to keep blood sugar levels in check by releasing hormones such as insulin, glucagon, somatostatin and pancreatic polypeptide.
- As an exocrine gland, it produces pancreatic juice which is sent through the pancreatic duct to the duodenum (part of the digestive system).
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4. Corpus luteum is a mass of cells found in :
(a) Brain
(b) Ovary
(c) Pancreas
(d) Spleen
[I.A.S. (Pre) 1997]
Ans. (b) Ovary
- The corpus luteum is a structure inside the female ovaries that is only there temporarily.
- It helps produce progesterone, estradiol, and inhibin A.
- It forms from an ovarian follicle during the luteal phase of the menstrual or oestrous cycle, which happens after an egg is released from the follicle.
- The cells that make up the corpus luteum come from the cells that surrounded the ovarian follicle.
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5. Which one of the following cells secrete androgen hormones in human being?
(a) Sertoli cells
(b) Cells of Leydig
(c) Germinal cells
(d) Mucus cells
[M.P.P.C.S. (Pre) 2019]
Ans. (b) Cells of Leydig
- In humans, androgen hormones are produced mainly by special cells called Leydig cells, which are located in the testicles.
- These hormones are responsible for the development and maintenance of male characteristics, and the main androgen hormone produced by Leydig cells is testosterone.
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6. Match List-I (Endocrine glands) with List-II (Hormones secreted) and select the correct answer using the codes given below :
List-I List-II
A. Gonads 1. Insulin
B. Pituitary 2. Progesterone
C. Pancreas 3. Growth hormones
D. Adrenal 4. Cortisol
Code :
A B C D
(a) 3 2 4 1
(b) 2 3 4 1
(c) 2 3 1 4
(d) 3 2 1 4
[Chhattisgarh P.C.S. (Pre) 2005, I.A.S. (Pre) 2000]
Ans. (c) 2 3 1 4
| Gonads |
Progesterone |
| Pituitary |
Growth hormones |
| Pancreas |
Insulin |
| Adrenal |
Cortisol |
7. Which hormone controls the quantity of urine from kidney?
(a) TSH
(b) ACTH
(c) FSH
(d) ADH
[U.P.U.D.A./L.D.A. (Spl.) (Mains) 2010]
Ans. (d) ADH
- The pituitary gland releases ADH, which helps control how much urine the kidneys release.
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8. Match List- I with List- II and select the correct answer from the code given below the Lists :
List- I List- II
(Hormones) (Secreting Gland)
A. Progesterone 1. Thyroid
B. Testosterone 2. Pancreas
C. Thyroxine 3. Ovaries (Females)
D. Insulin 4. Testes (Males)
Code :
A B C D
(a) 3 4 1 2
(b) 4 3 1 2
(c) 3 4 2 1
(d) 1 2 3 4
[U.P. U.D.A./L.D.A. (Pre) 2010]
Ans. (a) 3 4 1 2
- In females, the ovaries produce the hormone progesterone.
- Males produce testosterone in their testes.
- Thyroxine comes from the thyroid gland and insulin from the pancreas.
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9. Even though an animal is fed with carbohydrates rich diet, its blood sugar concentration tends to remain constant. This is on account of the fact that is the case of an animal-
(a) Hormones of pituitary glands control metabolic process.
(b) Hormones of pancreas cause such a condition.
(c) Blood sugar is readily absorbed by the liver.
(d) Glucose undergoes autolysis.
[I.A.S. (Pre) 1994]
Ans. (b) Hormones of pancreas cause such a condition
- Animals eating a diet full of carbs still have a steady blood sugar level due to the insulin hormone released by the pancreas.
- Diabetes is caused by not having enough insulin, and too much insulin causes low blood sugar, also known as hypoglycemia.
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10. What would happen if the pancreas is defective :
(a) Digestion will not take properly.
(b) Insulin and glucagon are not formed.
(c) Blood formation will stop.
(d) Blood pressure will increase.
[R.A.S./R.T.S. (Pre) 1992]
Ans. (b) Insulin and glucagon are not formed
- The pancreas is an organ that produces digestive enzymes and hormones like insulin, glucagon, and somatostatin.
- If the pancreas isn’t working correctly, the production of insulin and glucagon will be impacted.
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11. Which one of the following hormones stimulates pancreas for the production of digestive juice ?
(a) Rennin
(b) Trypsin
(c) Secretin
(d) Pepsin
[U.P.P.C.S. (Pre) 1996]
Ans. (c) Secretin
- Secretin is a hormone that tells the pancreas to make digestive juice and helps balance the acidity of the first part of the small intestine (duodenum) by reducing the amount of acid in the stomach.
- It is produced in the S cells of the duodenum and also helps control secretions in the stomach and liver.
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12. Insulin is
(a) Fat
(b) Vitamin
(c) Carbohydrate
(d) Protein
(e) None of the above/More than one of the above.
[60th to 62nd B.P.S.C. (Pre) 2016]
Ans. (d) Protein
- Insulin is a hormone made up of 51 amino acids, produced by the pancreas.
- It helps our bodies use carbohydrates, fats, and proteins by allowing glucose (sugar) to enter cells and be used for energy.
- It is important for metabolism and is considered the main anabolic hormone in the body.
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13. In human system, insulin controls the metabolism of :
(a) Fats
(b) Carbohydrates
(c) Proteins
(d) Nucleic acids
(e) None of the above/More than one of the above
[63rd B.P.S.C. (Pre) 2017]
Ans. (e) None of the above/More than one of the above
- Insulin is a hormone made by the pancreas with 51 different amino acids.
- It helps our bodies to use carbohydrates, fats, and proteins by allowing sugar to get into cells and be used as energy.
- It is important for metabolism and is thought of as the main hormone in the body for building up tissue.
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14. Insulin hormone is a –
(a) Glycolipid
(b) Fatty acid
(c) Peptide
(d) Sterol
[Jharkhand P.C.S. (Pre) 2010]
Ans. (c) Peptide
- Insulin is a chemical made by the pancreas with 51 parts.
- It helps our bodies turn carbs, fats, and proteins into energy by letting sugar enter cells.
- It plays a big role in metabolism and is the main hormone that helps build our bodies.
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15. Insulin is a –
(a) Steroid
(b) Carbohydrate
(c) Protein
(d) Fat
[U.P.P.C.S. (Mains) 2015]
Ans. (c) Protein
- Insulin is a hormone made by the pancreas that consists of 51 amino acids.
- It helps our bodies process carbohydrates, fats, and proteins into energy by allowing sugar to move into our cells.
- It is essential for metabolism and is seen as the most important hormone in the body.
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16. Insulin is produced by :
(a) Islets of Langerhans
(b) Pituitary gland
(c) Thyroid gland
(d) Adrenal gland
[Uttarakhand U.D.A./L.D.A. (Pre) 2003]
Ans. (a) Islets of Langerhans
- Insulin is a hormone made by the pancreas that consists of 51 amino acids.
- It helps our bodies turn carbohydrates, fats, and proteins into energy by allowing sugar to enter our cells.
- It is crucial for metabolism and is seen as the most important hormone in the body.
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17. The human hormone ‘insulin’ is produced in
(a) Liver
(b) Pancreas
(c) Kidney
(d) Pituitary
[U.P. Lower Sub. (Pre) 2004]
Ans. (b) Pancreas
- Insulin is a hormone created by the pancreas that has 51 different amino acids.
- It helps our body break down carbohydrates, fats, and proteins and turn them into energy by letting sugar get into our cells.
- This hormone is extremely important in the process of metabolism and is often seen as the most important hormone in the body.
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18. Insulin is a type of –
(a) Hormone
(b) Enzyme
(c) Vitamin
(d) Salt
[U.P.P.C.S. (Pre) 1993]
Ans. (a) Hormone
- Insulin is a chemical created by the pancreas with 51 parts.
- It helps us use the food we eat (carbs, fats, and proteins) by allowing sugar to get into our cells.
- It’s really important for how our body works and is the most important hormone in the body.
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19. Which hormone is produced in pancreas?
(a) Thyroxine
(b) Insulin
(c) Galanin
(d) Gastrin
(e) None of the above/More than one of the above
[66th B.P.S.C. (Pre) (Re. Exam) 2020]
Ans. (b) Insulin
- Insulin is a hormone made by the pancreas that is made up of 51 amino acids.
- It helps our bodies turn food into energy by allowing sugar to get inside our cells.
- It is very important for how our bodies use energy and is seen as the most important hormone in the body.
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20. Which metal is present in insulin?
(a) Tin
(b) Copper
(c) Zinc
(d) Aluminium
[Jharkhand P.C.S. (Pre) 2013]
Ans. (c) Zinc
- Insulin is a hormone made by the pancreas that helps our body use the sugar from carbohydrates we eat for energy or to store it for later use.
- It has certain chemicals like zinc, disodium hydrogen phosphate dihydrate, m-cresol, methyl p-hydroxybenzoate, and glycerine.
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21. Insulin is received from –
(a) Rhizome of ginger
(b) Roots of dahlia
(c) Balsam flower
(d) Potatoes tuber
[39th B.P.S.C. (Pre) 1994]
Ans. (b) Roots of dahlia
- Insulin is a hormone that helps keep our blood sugar level in check.
- It comes from the roots of dahlias and from the beta (β) cells in the pancreas.
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22. Which one of the following pairs is not correctly matched? Hormone Function
(a) Insulin – regulation of blood glucose
(b) Melatonin – regulation of sleep
(c) Oxytocin – release of milk from mammary glands
(d) Gastrin – regulation of blood pressure
[U.P.P.C.S. (Pre) 2017]
Ans. (d) Gastrin – regulation of blood pressure
- Gastrin is a type of protein that triggers the stomach to produce acid.
- Option (d) does not match, but the other options do.
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23. Hugging and kissing of mother to her baby initiates, which of following hormone for secretion?
(a) Insulin
(b) Noradrenaline
(c) Follicular hormone
(d) Oxytocin
[U.P. Lower P.C.S. (Pre) 2003]
Ans. (d) Oxytocin
- Oxytocin, sometimes known as the ‘love hormone’, causes the uterus to contract during childbirth.
- When a mother nurses her baby, oxytocin is released which makes her feel attached to the newborn.
- This is why oxytocin is also called the ‘cuddle hormone’.
- It is used to help women with labour pains and breast-feeding.
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24. Which of the following hormones play a role in release of milk from mammary glands?
(a) Andrenaline
(b) Thyroxine
(c) Progesterone
(d) Oxytocin
(e) None of the above/More than one of the above
[60th to 62nd B.P.S.C. (Pre) 2016]
Ans. (d) Oxytocin
- Oxytocin affects two parts of the female body – the uterus and the breasts.
- During childbirth, it helps the cervix and uterus expand, and it helps with breast-feeding by making the nipples sensitive and causing milk to be released from the mammary glands.
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25. Which one of the following is not a protein ?
(a) Keratin
(b) Fibroin
(c) Oxytocin
(d) Collagen
[U.P.P.C.S. (Spl) (Mains) 2008]
Ans. (c) Oxytocin
- Keratin is a protein that makes up the bulk of hair, nails, etc.
- Fibroin is a protein found in silk produced by silkworm larvae.
- Collagen is the main protein found in different tissues that connect the body together.
- Oxytocin is a hormone and peptide that is released in the body.
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26. Which hormone is injected to cows and buff aloes to make the milk descend to the udders :
(a) Somatotropin
(b) Oxytocin
(c) Interferon
(d) Insulin
[U.P.P.C.S. (Pre) 1997]
Ans. (b) Oxytocin
- Oxytocin is released in large quantities when the cervix and uterus stretch during childbirth, helping with the birth, creating a strong bond between mother and baby, and causing the milk to be released from the nipples.
- The oxytocin hormone (called Pitocin) is also given to cows and buffaloes to make the milk come out of their udders.
- This all happens because of positive feedback mechanisms.
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27. Which gland secretes the milk ejection hormone oxytocin?
(a) Pituitary gland
(b) Thyroid gland
(c) Parathyroid gland
(d) Adrenal gland
[R.A.S./R.T.S.(Pre) 2007]
Ans. (a) Pituitary gland
- The pituitary gland is known as the controlling gland of the body, which controls the activities of all the other glands that produce hormones.
- Oxytocin is a hormone made in the brain that is released by the pituitary gland.
- It mainly helps to control the brain.
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28. The pituitary gland by virtue of its tropic hormones controls the secretion activity of other endocrine glands. Which one of the following endocrine gland can function independent of the pituitary gland ?
(a) Thyroid
(b) Gonads
(c) Adrenals
(d) Parathyroid
[I.A.S. (Pre) 1997]
Ans. (d) Parathyroid
- Parathyroid glands are tiny glands located in the neck of people and other four-legged animals.
- They make a hormone called parathyroid hormone which, along with calcitonin (a hormone made by the thyroid gland), helps to control the amount of calcium in the blood and bones.
- Parathyroid glands can work without the pituitary gland.
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29. Iodised salt is useful because it–
(a) Improves digestion
(b) Increases resistance to diseases
(c) Controls the thyroid gland
(d) All of the above
[Jharkhand P.C.S. (Pre) 2013]
Ans. (c) Controls the thyroid gland
- Table salt with a tiny amount of iodine added in is called iodized salt.
- If we don’t have enough iodine, our thyroid gland can become unhealthy.
- Iodized salt helps us to keep our thyroid gland healthy.
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30. Assertion (A) : Goitre is a general disease in hilly areas.
Reason (R) : People consume a low amount of iodine
in food in the hilly area.
Which of the following is correct answer :
Code :
(a) (A) and (R) both are true, and (R) is the correct explanation of (A).
(b) (A) and (R) both are true, but (R) is not the correct explanation of (A).
(c) (A) is true, but (R) is correct.
(d) (A) is not correct, but (R) is true.
[Uttarakhand P.C.S. (Pre) 2012]
Ans. (a) (A) and (R) both are true, and (R) is the correct explanation of (A).
- Goitre is a condition caused by not having enough iodine, which causes the thyroid gland in the neck to become larger.
- It is a common disease and mostly affects people living in mountainous regions.
- These areas usually have a low level of iodine in the soil, water, and crops.
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31. What is thyroxine?
(a) Vitamin
(b) Hormone
(c) Enzyme
(d) None of these
[U.P.P.C.S. (Pre) 2003]
Ans. (b) Hormone
- Thyroxine is a hormone made by the thyroid gland that is important for many body functions, such as heart and digestive function, metabolism, brain development, bone health, and muscle control.
- When there is not enough thyroxine, it can lead to serious diseases in children, such as cretinism and myxedema
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32. Iodine containing hormone is –
(a) Thyroxine
(b) Insulin
(c) Adrenaline
(d) Testrogen
[R.A.S./R.T.S. (Pre) 1999]
Ans. (a) Thyroxine
- The thyroid gland is situated in the front of the neck, attached to the larynx (the voice box) and the trachea (the windpipe).
- It produces two hormones, thyroxine (T4) and triiodothyronine (T3), which are made up of iodine and the amino acid tyrosine.
- Thyroxine has four iodine atoms and triiodothyronine has three.
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33. Which one of the following hormones contains iodine ?
(a) Thyroxine
(b) Testosterone
(c) Insulin
(d) Adrenaline
[I.A.S. (Pre) 1995]
Ans. (a) Thyroxine
- The thyroid gland is found in the front of the neck, connected to the lower part of the voice box and the upper part of the throat.
- It produces two types of thyroid hormones –
- Thyroxine (T4)
- Triiodothyronine (T3)
- These hormones contain iodine and are made from iodine and the amino acid tyrosine.
- T4 has four iodine atoms and T3 has three iodine atoms.
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34. Which of the following hormones contains iodine?
(a) Testosterone
(b) Adrenaline
(c) Thyroxine
(d) Insulin
(e) None of the above/More than one of the above
[65th B.P.S.C. (Pre) 2019]
Ans. (c) Thyroxine
- The thyroid gland is located near the voice box and windpipe in the neck.
- It produces two types of hormones, thyroxine (T4) and triiodothyronine (T3), which contain iodine.
- Thyroid cells join iodine and tyrosine to form the hormones T4 and T3, where T4 has four iodine atoms and T3 has three.
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35. Iodine containing, thyroxine hormone is –
(a) Glucose
(b) Amino acid
(c) Ester
(d) Peptides
[R.A.S./R.T.S. (Pre) 1999]
Ans. (b) Amino acid
- The thyroid, found in the front of the neck, is connected to the larynx (voice box) and trachea (windpipe).
- It makes two hormones (thyroxine (T4) and triiodothyronine (T3) that contain iodine.
- The hormones are created by combining iodine and tyrosine into molecules.
- T4 contains four iodine atoms and T3 has three.
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36. Which hormone stimulates the thyroid gland to secrete thyroxine?
(a) TSH
(b) FSH
(c) LTH
(d) ACTH
[45th B.P.S.C. (Pre) 2001]
Ans. (a) TSH
- The pituitary gland produces a hormone called thyroid-stimulating hormone (TSH) which controls the hormones released from the thyroid.
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37. Match the hormones in List-I with items in List-II and select the correct answer using the codes given below :
List-I List-II
A. Adrenaline 1. Anger, fear, danger
B. Estrogen 2. Attracting partners through sense of smell
C. Insulin 3. Females
D. Pheromones 4. Glucose
Code :
A B C D
(a) 3 1 4 2
(b) 1 3 2 4
(c) 1 3 4 2
(d) 3 1 2 4
[I.A.S. (Pre) 1999]
Ans. (c) 1342
| Adrenaline |
Anger, fear, danger |
| Estrogen |
Females |
| Insulin |
Glucose |
| Pheromones |
Attracting partners through the sense of smell |
38. Of the following which hormone is associated with ‘fight or flight’ concept ?
(a) Insulin
(b) Adrenaline
(c) Estrogen
(d) Oxytocin
[U.P.P.S.C. (GIC) 2010, U.P.P.C.S. (Spl.) (Mains) 2004, U.P.P.C.S. (Pre) 2003, U.P. U.D.A./L.D.A. (Pre) 2002, U.P. P.C.S. (Pre) 2001]
Ans. (b) Adrenaline
- Adrenaline, or the ‘fight or flight hormone’, is released from the adrenal glands.
- It causes your blood vessels to open up more, resulting in your body becoming more active and excited.
- This causes an alarm reaction, your heart rate and pressure to increase, and a feeling of excitement.
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39. Secretion of which hormone increases heart beat and produces a feeling of excitement?
(a) Cortisone
(b) Insulin
(c) Adrenaline
(d) Testosterone
[R.A.S./R.T.S.(Pre) 2003]
Ans. (c) Adrenaline
- Adrenaline, also known as the ‘fight or flight hormone’, is released from the adrenal glands.
- It works with noradrenaline to get the body ready for fight or flight.
- Adrenaline causes the blood vessels to widen, which supply the brain, muscles, heart, lungs, liver, fat, and sensory organs.
- This increased blood supply makes the organs work harder and faster, making the heart beat faster and stronger, raising pulse rate, blood pressure, and cardiac output.
- It also produces a feeling of excitement.
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40. By whom estrogen is produced –
(a) Egg
(b) Follicles
(c) Corpus luteum
(d) Uterus
[R.A.S./R.T.S. (Pre) 1994]
Ans. (b) Follicles
- The ovaries are where estrogen hormones are mainly made.
- They come out of the follicles on the ovaries, as well as the corpus luteum after the egg has been released from the follicle and the placenta.
- Estrogen hormones are responsible for giving women their secondary sexual features like breasts, the lining of the uterus, and the menstrual cycle.
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41. What is estrogen?
(a) Bone
(b) Hormone
(c) Enzyme
(d) Vitamin
[U.P.P.C.S (Pre) 2000]
Ans. (b) Hormone
- Estrogen hormones are mostly made in the ovaries.
- They come out of the follicles and the corpus luteum after an egg has been released from the follicle, and from the placenta.
- Estrogens help create physical traits that are unique to women, like breasts, the lining of the uterus, and the menstrual cycle.
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42. The female sex hormone is:
(a) estrogen
(b) androgen
(c) insulin
(d) oxytocin
(e) None of the above / More than one of the above
[66th B.P.S.C. (Pre) 2020]
Ans. (a) estrogen
- Estrogen (oestrogen) is the hormone that is responsible for female sexual characteristics and the development and functioning of female reproductive organs.
- It is mainly produced by the ovaries.
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43. Which one of the following is a female sex-hormone?
(a) Androsterone
(b) Testosterone
(c) Estrone
(d) Thyroxine
[U.P. R.O./A.R.O. (Pre) 2017]
Ans. (c) Estrone
- Estrone is a weak form of estrogen, which is a hormone that plays a role in female sex characteristics.
- Testosterone is a hormone that affects males, and it includes androgen.
- Thyroxine is a hormone made by the thyroid gland that helps control the body’s metabolism.
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44. After menopause, production of which of the following hormones does not take place in women ?
(a) Progesterone
(b) Testosterone
(c) Estrogen
(d) None of these
[U.P.P.C.S. (Pre) 2014]
Ans. (a & c) Progesterone & Estrogen
- At menopause, the ovaries stop releasing estrogen and progesterone.
- They still produce a small amount of testosterone, which can be changed to estrogen in body fat.
- The adrenal glands also produce androstenedione, which is changed to estrone and estradiol in body fat.
- However, the amount of estrogen after menopause is much lower than when a woman is of reproductive age.
- UPPSC initially said option (c) was the right answer to this question, but later they cancelled it.
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45. With reference to the human body, consider the following statements :
1. The production of somatotropin goes up when a person exercises.
2. Men’s testes produce progesterone.
3. Women’s adrenal glands secrete testosterone.
4. Stress causes the adrenals to release very less amount of cortisol than usual.
Which of these statements are correct?
(a) 1, 2, 3 and 4
(b) 1, 2 and 3
(c) 2, 3 and 4
(d) 1 and 4
[I.A.S. (Pre) 2002]
Ans. (b) 1, 2 and 3
- Growth hormone (GH), also known as somatotropin, helps with growth, making new cells and healing.
- When you exercise, your body makes more of it.
- Progesterone is mainly a female hormone, but men also make a small amount.
- It is found in the ovaries, adrenal glands, testes and brain, and in the placenta during pregnancy.
- Testosterone is a male hormone made in the testicles.
- Women also make some in their ovaries and adrenal glands.
- Cortisol is made by the adrenal gland and is released when you are stressed or have low blood sugar.
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46. Match the List-I with List-II and select the correct answer with codes given below :
List-I List-II
A. Hormone 1. Lipase
B. Enzyme 2. Testosterone
C. Phospholipid 3. Lecithin
D. Polymer 4. Polythene
Code :
A B C D
(a) 2 1 3 4
(b) 4 1 2 3
(c) 2 3 4 1
(d) 1 2 3 4
[U.P.P.C.S. (Pre) 1997]
Ans. (a) 2 1 3 4
| Hormone |
Testosterone |
| Enzyme |
Lipase |
| Phospholipid |
Lecithin |
| Polymer |
Polythene |
47. In human body, which one of the following hormones regulates blood calcium and phosphate ?
(a) Glucagon
(b) Growth hormone
(c) Parathyroid hormone
(d) Thyroxine
[I.A.S. (Pre) 2007]
Ans. (c) Parathyroid hormone
- Parathyroid hormone (PTH) is made up of 84 amino acids and is released by the chief cells of the parathyroid glands.
- Its role is to control the calcium levels in the body.
- PTH decreases the amount of phosphate that is reabsorbed into the kidney, which causes more phosphate to be released in urine.
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48. Consider the following statements :
Assertion (A) : During sleep, bright light is undesirable.
Reason (R) : In bright light, production of melatonin
in the body is considerably increased.
Select your answer using the codes given below.
Code :
(a) Both (A) and (R) are correct, and (R) is the correct explanation of (A).
(b) Both (A) and (R) are correct, but (R) is not correct explanation of (A).
(c) (A) is true, but (R) is false.
(d) (A) is false, but (R) is true.
[U.P.R.O./A.R.O (Pre) 2014]
Ans. (c) (A) is true, but (R) is false.
- The pineal gland in the brain produces a hormone called melatonin, which helps keep the body’s 24-hour cycle (circadian rhythm) in check.
- Our bodies make more melatonin when it is dark, and less melatonin when it is light.
- Even though the reason given (R) is incorrect, the statement (A) is correct.
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49. Pheromones are found in –
(a) Insects
(b) Snakes
(c) Birds
(d) Bats
[R.A.S./R.T.S.(Pre) 2008]
Ans. (a) Insects
- Pheromones are chemicals made by animals, especially insects, that can change the behavior or physical state of other animals of the same species.
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50. Pheromones are generally produced by –
(a) Snakes
(b) Birds
(c) Bats
(d) Insects
[U.P.P.C.S. (Pre) 2015]
Ans. (d) Insects
- Pheromones are chemicals made by animals, usually insects, which can influence the behavior and health of other animals of the same species.
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