11. Which of the following is the thermoregulatory centre of the man body? (UPSC Prelims 1991)
[A] Pituitary
[B] Skin
[C] Hypothalamus
[D] Thyroid
Show Answer
Correct Answer: C [Hypothalamus]
Notes:
The thermoregulatory center in the hypothalamus controls the temperature at which the human body operates. There are two sets of thermoreceptors involved in the controlling of the body temperature.
12. What does H denote in the popular term HIV ?
[A] Human
[B] Higher
[C] Hybrid
[D] NOTA
Show Answer
Correct Answer: A [Human]
Notes:
The Human Immunodeficiency Virus (HIV) are two species of lentivirus. It causes life-threatening disease of AIDS in humans and infects them. HIV is a sexually transmitted infection and occurs by contact with or transfer of blood, pre-ejaculate, semen, and vaginal fluids.
13. Gonyaulax, which are known for causing red tides, belong to which of the following?
[A] Algae
[B] Fungi
[C] Protista
[D] Bacteria
Show Answer
Correct Answer: C [Protista ]
Notes:
Red tides are caused by Gonyaulax which are small, microscopic organisms that grow in water and also called dinoflagellates.
14. Which of the following protects the body from infectious disease?
[A] Leukocytes
[B] Red Blood Cells
[C] Endoplasmic Reticulum
[D] Golgi Bodies
Show Answer
Correct Answer: A [Leukocytes]
Notes:
White blood cells (WBC), also called leukocytes or leukocytes. Immune system cells that help protect our body from infectious diseases.
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. Which of the following minerals is related to cytochromes?
[A] Cu and Fe
[B] Cu
[C] Mg
[D] Fe
Show Answer
Correct Answer: A [Cu and Fe]
Notes:
The minerals associated with cytochromes are Fe and Cu.
17. Which of the following is not a characteristic of Bryophyta?
[A] Motile sperms
[B] Presence of archegonium
[C] Presence of archegonium
[D] Photosynthetically independent sporophyte
Show Answer
Correct Answer: D [Photosynthetically independent sporophyte]
Notes:
Motile sperms, the Presence of archegonium, and the Presence of archegonium are characteristics of Bryophyta.
18. In gymnosperms, pollen drop is the__?
[A] Red drop
[B] Pollens dropped by wind
[C] Secretion of nucellus
[D] Water drops
Show Answer
Correct Answer: C [Secretion of nucellus]
Notes:
In gymnosperms, the pollen drop is a liquid droplet or a liquid nucellus secretion. It accumulates at the top of the ovum and when dried, it moves to the ovule of the gymnosperm for fertilization of the ovum.
19. How many stamens are present in the family Liliaceae?
[A] 6
[B] 9
[C] 5
[D] 7
Show Answer
Correct Answer: A [6]
Notes:
Liliaceae usually have 6 stamens. A style is sometimes divided into three branches. The fruit may be a dry capsule with a membranous or leathery exterior or a fleshy berry.
20. Which tissue contains various glands, which secrete oils, resins, tannins, mucilage, etc. to the plant?
[A] Laticiferous
[B] Euphorbiaceae
[C] Glandular
[D] All of the above
Show Answer
Correct Answer: C [Glandular]
Notes:
Glandular tissue contains various glands, which secrete oils, resins, tannins, mucilage, etc. to the plant.
