11. Which one of the following is secreted by Pancreas and regulates the amount of sugar in the body? (UPSC Prelims 1980).
[A] Renin
[B] Creatin
[C] Vitamin
[D] Insulin
Show Answer
Correct Answer: D [Insulin]
Notes:
Insulin and glucagon are hormones secreted by islet cells within the pancreas. They are both secreted in response to blood sugar levels, but in opposite fashion. Insulin is normally secreted by the beta cells of the pancreas. Glucagon raises blood glucose levels by stimulating the liver to metabolize glycogen into glucose molecules and to release glucose into the blood. Insulin is a hormone that regulates blood sugar levels.
12. The introduction of Pre-natal Diagnostic Techniques Bill in Parliament was prompted by the increasing incidence of? (UPSC Prelims 1992)
[A] Female foeticide
[B] Failure of contraceptive devices
[C] Spurious drugs being used for prenatal immunisation
[D] Unqualified persons diagnosing pregnancy in villages by primitive methods
Show Answer
Correct Answer: A [Female foeticide]
Notes:
The introduction of Pre-natal Diagnostic Techniques Bill in Parliament was prompted by the increasing incidence of Female foeticide. Female feticide is the abortion of a female foetus outside of legal methods. The frequency of female foeticide in India is increasing day by day. The natural sex ratio is assumed to be between 103 and 107, and any number above it is considered as suggestive of female foeticide.
13. Deficiency in which among the following leads to goitre?
[A] Iodine
[B] Calcium
[C] Phosporous
[D] Zinc
Show Answer
Correct Answer: A [Iodine]
Notes:
Goitre is a disorder caused due to the deficiency of iodine. Malfunction of thyroid gland leads to goitre (Swelling of neck). It is due to the bulge of the thyroid gland.
14. Which part of the human body is affected by Alziemer’s disease?
[A] Brain
[B] Lungs
[C] Heart
[D] Kidneys
Show Answer
Correct Answer: A [Brain]
Notes:
Alziemer’s is a disease which attacks the neural system, It results in continuous decline in the number brain cells which leads to loss of memory.
15. Protein is made up of which of the following?
[A] Sugar
[B] Amino acid
[C] Carbohydrate
[D] Fatty acid
Show Answer
Correct Answer: B [Amino acid
]
Notes:
All proteins are linked by a peptide link and are polymers of amino acids. Amino acid is the building block of protein.
16. Cycas, pinus, Thuja, Cedrus, Abies, Larix are some of the examples of __?
[A] gymnosperms
[B] Phaeophytes
[C] Bryophytes
[D] None of these
Show Answer
Correct Answer: A [gymnosperms]
Notes:
Cycas, pinus, Thuja, Cedrus, Abies, Larix are some of the examples of gymnosperms.
17. Which of the following are the roots of gymnosperms?
[A] Tap root
[B] Adventitious roots
[C] Rhizoid
[D] Rhizophores
Show Answer
Correct Answer: A [Tap root]
Notes:
The root system present in gymnosperms is the taproot system. Tap roots somewhat dilute the root of the upright plant and grow vertically downwards.
18. What is the arrangement of megaspores in tetrads in gymnosperms?
[A] Decussate
[B] Tetrahedral
[C] Linear
[D] Isobilateral
Show Answer
Correct Answer: C [Linear]
Notes:
These are formed from the mother cells inside the anther. Thus, the tetrad of the megaspore is usually linear.
19. What is the arrangement of ovules inside the ovary called?
[A] Aestivation
[B] Placentation
[C]
Hibernation
[D] Fragmentation
Show Answer
Correct Answer: B [Placentation]
Notes:
The arrangements of ovules within the ovary are known as placentation.
20. Which plant tissue has the ability to grow rapidly by division?
[A] Meristematic tissue
[B] Permanent tissues
[C] Complex Permanent Tissue
[D] Protective tissues
Show Answer
Correct Answer: A [Meristematic tissue]
Notes:
Meristematic tissues have the ability to grow rapidly by division and they help in the major development of vegetation. The increase in length and increase in diameter of the plant is done by these cells. Meristematic cells are dense, living cells that have a large nucleus.
