11. Which organ of the body produces the fluid known as bile?
[A] Liver
[B] Pancreas
[C] Gall bladder
[D] Kidney
Show Answer
Correct Answer: A [Liver]
Notes:
Liver produces a digestive fluid known as bile. Liver release bile into Gall bladder, a small, pear shaped organ located just below your liver in the upper right side of your abdomen.
12. Which one of the following genetic diseases is sex-linked? (UPSC Prelims 1999)
[A] Royal haemophilia
[B] Tay-Sachs disease
[C] Cystic fibrosis
[D] Hypertension
Show Answer
Correct Answer: A [Royal haemophilia]
Notes:
Royal haemophilia is sex- linked disease. Clotting of blood is abnormally delayed even small cut will result in non stop bleeding in the affected individual. Queen Victoria was a carrier of this disease and produce haemophilic descendents, so haemophilia is a royal disease.
13. In which branch of biology is the study of breasts deals?
[A] Mammology
[B] Mastology
[C] Malacology
[D] None of these
Show Answer
Correct Answer: B [Mastology]
Notes:
Mastology can refer to the study of the human breast and related diseases.
14. Which of the following biomolecules is more widely distributed in the cell?
[A] Chloroplast
[B] RNA
[C] DNA
[D] Spaherosomes
Show Answer
Correct Answer: B [RNA]
Notes:
DNA and RNA are two types of nucleic acids. DNA is converted into RNA by the process of transcription. The three types of RNA are m-RNA, t-RNA and r-RNA.
15. Which virus is most susceptible to chloroform?
[A] Herpes
[B] Influenza
[C] Measles
[D] All of these
Show Answer
Correct Answer: D [All of these]
Notes:
Herpes, Influenza and Measles viruses are most susceptible to chloroform.
16. Chemotaxis is a phenomenon of__?
[A] swimming away of bacteria
[B] swimming towards a bacteria
[C] swimming away or towards of bacteria in presence of chemical compound
[D] All of the above
Show Answer
Correct Answer: C [swimming away or towards of bacteria in presence of chemical compound]
Notes:
Chemotaxis is a phenomenon of swimming away or towards of bacteria in presence of chemical compound.
17. 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.
18. To which family do brown mustard and broccoli belong?
[A] Solanaceae
[B] Fabaceae
[C] Cruciferae
[D] None of these
Show Answer
Correct Answer: C [Cruciferae]
Notes:
Brassicaceae or Cruciferae is a medium-sized family of flowering plants commonly known as the mustard, cruciferous or cabbage family.
19. Drying, wilting, and dropping of leaves of a plant due to insufficient water supply, excessive transpiration, or any vascular disease is called
[A] Guttation
[B] Phyllotaxy
[C] Wilting
[D] Phyllode
Show Answer
Correct Answer: C [Wilting]
Notes:
Drying, wilting, and dropping of leaves of a plant due to insufficient water supply, excessive transpiration, or any vascular disease is called Wilting.
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.
