Q. Which group of organisms is known for being autotrophic? (2023)
A.
Animals
B.
Fungi
C.
Plants
D.
Bacteria
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Solution
Plants are known for being autotrophic as they can produce their own food through photosynthesis.
Correct Answer: C — Plants
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Q. Which group of organisms is known for their ability to live in extreme environments? (2023)
A.
Eubacteria
B.
Archaebacteria
C.
Fungi
D.
Protozoa
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Solution
Archaebacteria are known for their ability to thrive in extreme environments.
Correct Answer: B — Archaebacteria
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Q. Which group of plants is known for having vascular tissues? (2019)
A.
Bryophytes
B.
Pteridophytes
C.
Algae
D.
Mosses
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Solution
Pteridophytes are the first group of plants to develop vascular tissues, which help in the transport of water and nutrients.
Correct Answer: B — Pteridophytes
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Q. Which haloalkane is most likely to undergo elimination reactions? (2023)
A.
1-bromopropane
B.
2-bromobutane
C.
3-bromobutane
D.
Bromobenzene
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Solution
3-bromobutane is more likely to undergo elimination reactions due to the presence of a tertiary carbon.
Correct Answer: C — 3-bromobutane
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Q. Which hormone is involved in the process of apical dominance? (2019)
A.
Gibberellins
B.
Auxins
C.
Cytokinins
D.
Ethylene
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Solution
Auxins are primarily responsible for maintaining apical dominance by inhibiting the growth of lateral buds.
Correct Answer: B — Auxins
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Q. Which hormone is involved in the process of fruit ripening? (2020)
A.
Gibberellins
B.
Auxins
C.
Ethylene
D.
Cytokinins
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Solution
Ethylene is the hormone that plays a key role in the ripening of fruits.
Correct Answer: C — Ethylene
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Q. Which hormone is involved in the regulation of apical dominance? (2019)
A.
Auxins
B.
Cytokinins
C.
Gibberellins
D.
Ethylene
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Solution
Auxins play a crucial role in maintaining apical dominance by inhibiting the growth of lateral buds.
Correct Answer: A — Auxins
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Q. Which hormone is involved in the regulation of calcium levels in the blood? (2023)
A.
Calcitonin
B.
Parathyroid hormone
C.
Insulin
D.
Glucagon
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Solution
Parathyroid hormone (PTH) is responsible for increasing blood calcium levels by promoting calcium release from bones and increasing calcium absorption in the intestines.
Correct Answer: B — Parathyroid hormone
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Q. Which hormone is involved in the regulation of stomatal closure during water stress? (2023)
A.
Gibberellins
B.
Cytokinins
C.
Abscisic acid
D.
Auxins
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Solution
Abscisic acid is involved in the regulation of stomatal closure during water stress to prevent water loss.
Correct Answer: C — Abscisic acid
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Q. Which hormone is involved in the regulation of the menstrual cycle? (2021)
A.
Progesterone
B.
Testosterone
C.
Cortisol
D.
Insulin
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Solution
Progesterone is a hormone that plays a key role in regulating the menstrual cycle and maintaining pregnancy.
Correct Answer: A — Progesterone
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Q. Which hormone is involved in the regulation of water balance in the body? (2022)
A.
Aldosterone
B.
Insulin
C.
Thyroxine
D.
Adrenaline
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Solution
Aldosterone is a hormone that helps regulate water balance by promoting sodium retention in the kidneys, which in turn affects water retention.
Correct Answer: A — Aldosterone
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Q. Which hormone is primarily involved in the regulation of stomatal opening?
A.
Auxin
B.
Gibberellin
C.
Abscisic acid
D.
Cytokinin
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Solution
Abscisic acid plays a key role in closing stomata during water stress, thus regulating water loss.
Correct Answer: C — Abscisic acid
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Q. Which hormone is primarily involved in the regulation of water balance in the body? (2022)
A.
Aldosterone
B.
Antidiuretic hormone (ADH)
C.
Cortisol
D.
Insulin
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Solution
Antidiuretic hormone (ADH), also known as vasopressin, plays a key role in regulating water balance by promoting water reabsorption in the kidneys.
Correct Answer: B — Antidiuretic hormone (ADH)
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Q. Which hormone is primarily involved in the regulation of water loss in plants? (2023)
A.
Auxin
B.
Gibberellin
C.
Abscisic acid
D.
Cytokinin
Show solution
Solution
Abscisic acid plays a crucial role in regulating water loss by causing stomatal closure during water stress.
Correct Answer: C — Abscisic acid
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Q. Which hormone is primarily involved in the response of plants to drought stress? (2023)
A.
Gibberellins
B.
Auxins
C.
Abscisic acid
D.
Cytokinins
Show solution
Solution
Abscisic acid plays a crucial role in helping plants respond to drought stress by closing stomata.
Correct Answer: C — Abscisic acid
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Q. Which hormone is primarily responsible for promoting cell elongation in plants? (2021)
A.
Gibberellins
B.
Auxins
C.
Cytokinins
D.
Ethylene
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Solution
Auxins are known to promote cell elongation by loosening the cell walls, allowing cells to expand.
Correct Answer: B — Auxins
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Q. Which hormone is primarily responsible for regulating the menstrual cycle? (2022)
A.
Testosterone
B.
Estrogen
C.
Progesterone
D.
Insulin
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Solution
Estrogen plays a crucial role in regulating the menstrual cycle, along with progesterone.
Correct Answer: B — Estrogen
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Q. Which hormone is primarily responsible for the fight-or-flight response? (2019)
A.
Cortisol
B.
Epinephrine
C.
Insulin
D.
Thyroxine
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Solution
Epinephrine (adrenaline) is the primary hormone responsible for the fight-or-flight response, preparing the body for quick action.
Correct Answer: B — Epinephrine
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Q. Which hormone is produced by the thyroid gland? (2023)
A.
Insulin
B.
Thyroxine
C.
Cortisol
D.
Adrenaline
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Solution
Thyroxine is produced by the thyroid gland and plays a crucial role in regulating metabolism.
Correct Answer: B — Thyroxine
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Q. Which hormone is responsible for the 'fight or flight' response? (2023)
A.
Cortisol
B.
Adrenaline
C.
Insulin
D.
Thyroxine
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Solution
Adrenaline (epinephrine) is the hormone that prepares the body for a 'fight or flight' response during stressful situations.
Correct Answer: B — Adrenaline
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Q. Which hormone is responsible for the development of secondary sexual characteristics in males? (2019)
A.
Estrogen
B.
Progesterone
C.
Testosterone
D.
Luteinizing hormone
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Solution
Testosterone is the hormone responsible for the development of secondary sexual characteristics in males, such as increased muscle mass and body hair.
Correct Answer: C — Testosterone
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Q. Which hormone is responsible for the regulation of metabolism and energy levels? (2022)
A.
Thyroxine
B.
Insulin
C.
Testosterone
D.
Estrogen
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Solution
Thyroxine (T4) is a hormone produced by the thyroid gland that plays a crucial role in regulating metabolism and energy levels.
Correct Answer: A — Thyroxine
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Q. Which hormone is secreted by the adrenal medulla? (2019)
A.
Cortisol
B.
Aldosterone
C.
Epinephrine
D.
Insulin
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Solution
Epinephrine, also known as adrenaline, is secreted by the adrenal medulla and is involved in the body's fight-or-flight response.
Correct Answer: C — Epinephrine
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Q. Which hormone is secreted by the pancreas to lower blood glucose levels? (2023)
A.
Glucagon
B.
Insulin
C.
Somatostatin
D.
Cortisol
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Solution
Insulin is secreted by the pancreas and is responsible for lowering blood glucose levels by facilitating glucose uptake by cells.
Correct Answer: B — Insulin
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Q. Which hormone is secreted by the pancreas to lower blood sugar levels? (2020)
A.
Glucagon
B.
Insulin
C.
Somatostatin
D.
Cortisol
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Solution
Insulin is secreted by the pancreas and plays a key role in lowering blood sugar levels by facilitating glucose uptake.
Correct Answer: B — Insulin
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Q. Which hormone is secreted by the pancreas to raise blood sugar levels? (2019)
A.
Insulin
B.
Glucagon
C.
Somatostatin
D.
Cortisol
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Solution
Glucagon is secreted by the pancreas and raises blood sugar levels by promoting the conversion of glycogen to glucose in the liver.
Correct Answer: B — Glucagon
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Q. Which hormone is secreted by the pancreas to regulate blood sugar levels? (2022)
A.
Insulin
B.
Glucagon
C.
Somatostatin
D.
Cortisol
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Solution
Insulin is secreted by the pancreas and plays a crucial role in lowering blood sugar levels by facilitating glucose uptake by cells.
Correct Answer: A — Insulin
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Q. Which hormone is secreted by the pancreas to regulate metabolism? (2023)
A.
Insulin
B.
Glucagon
C.
Somatostatin
D.
All of the above
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Solution
The pancreas secretes insulin, glucagon, and somatostatin, all of which play roles in regulating metabolism.
Correct Answer: D — All of the above
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Q. Which hormone is secreted by the pancreas? (2020)
A.
Insulin
B.
Thyroxine
C.
Cortisol
D.
Epinephrine
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Solution
Insulin is the hormone secreted by the pancreas that helps regulate blood glucose levels.
Correct Answer: A — Insulin
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Q. Which hormone regulates blood pressure by causing vasoconstriction? (2019)
A.
Insulin
B.
Adrenaline
C.
Aldosterone
D.
Angiotensin II
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Solution
Angiotensin II is a potent vasoconstrictor that plays a key role in regulating blood pressure.
Correct Answer: D — Angiotensin II
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