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. Which one of the following is monogamous? (UPSC Prelims 2002)
[A] Wolf
[B] Walrus
[C] Seal
[D] Deer
Show Answer
Correct Answer: A [Wolf]
Notes:
Wolf alpha pairs are usually monogamous with each other, but alpha males have been known to stray with other pack members, especially if they are closely related. Among red foxes, long considered extremely loyal, mate switching has also been shown.
14. Which among the following is an optimum temperature for wheat seed germination?
[A] 11-15 deg celsius
[B] 15-25 deg celsius
[C] 10-12 deg celsius
[D] 20-22 deg celsius
Show Answer
Correct Answer: C [10-12 deg celsius]
Notes:
10-12 deg celsius is the optimum temperature for wheat germination. 25-30 deg celsius is the optimum temperature for crop growth.
15. In the branch of biology, what is the transmission of paternal traits to progeny called?
[A] Genetics
[B] Heredity
[C] Gerontology
[D] Genetic Engineering
Show Answer
Correct Answer: B [Heredity]
Notes:
The transmission of characteristics from parent to offspring is called heredity, and can be inferred from inherited characteristics.
16. Which of the following vitamins was discovered by Sir Edward Mellanby?
[A] Vitamin C
[B] Vitamin D
[C] Vitamin K
[D] Vitamin E
Show Answer
Correct Answer: B [Vitamin D]
Notes:
Vitamin D was discovered by Sir Edward Mellanby.
17. Which of the following algae is used to make iodine?
[A] Macrocystis
[B] Surgassum
[C] Synechococcus
[D] Anabina
Show Answer
Correct Answer: A [Macrocystis]
Notes:
Laeminaria and Macrocystis are algae used in Iodine making. Anabina is used as a biofertilizer.
18. The lysogenic state is controlled by the activity of the regulatory region of the lambda phage genome, this region is called?
[A] immunity repressor
[B] immunity operon
[C] operon repressor
[D] none of these
Show Answer
Correct Answer: B [immunity operon]
Notes:
The lysogenic state is controlled by the activity of the regulatory region of the lambda phage genome, this region is called immunity operon.
19. How do bryophytes differ from pteridophytes?
[A] Swimming antherozoids
[B] An independent gametophyte
[C] Archegonia
[D] Lack of vascular tissue
Show Answer
Correct Answer: D [Lack of vascular tissue]
Notes:
Vascular tissue is completely absent in bryophytes. Water and nutrients enter the cells by diffusion. And vascular tissue in rhodophytes consists of xylem and phloem.
20. Which of the following is true about bryophytes.
[A] They possess archegonia
[B] They contain chloroplast
[C] They are thalloid
[D] All of these
Show Answer
Correct Answer: D [All of these]
Notes:
Bryophytes are possess archegonia, contain chloroplast and thalloid. Bryophytes are small, non-vascular plants, such as mosses, liverworts, and hornworts.
