11. Consumption of fish is considered to be healthy when compared to flesh of other animals because fish contains which of the following minerals? (UPSC Prelims 1998)
[A] Polyunsaturated fatty acids
[B] saturated fatty acids
[C] essential vitamins
[D] more carbohydrates and proteins
Show Answer
Correct Answer: A [Polyunsaturated fatty acids]
Notes:
Consumption of fish is considered to be healthy when compared to flesh of other animals because fish contains polyunsaturated fatty acids. Polyunsaturated fatty acid is an anti oxidant, which helps in building of tissues.
12. Which organelle in the cell, other than nucleus, contains DNA? (UPSC Prelims 2001)
[A] Centriole
[B] Golgi apparatus
[C] Lysosome
[D] Mitochondrion
Show Answer
Correct Answer: D [Mitochondrion]
Notes:
Mitochondrion is the organelle in the cell, other than nucleus that contains DNA. Mitochondria are the working organelles that keep the cell full of energy. Mitochondria are small organelles floating free throughout the cell. Some cells have several thousand mitochondria while others have none. Muscle cells need a lot of energy so they have loads of mitochondria.
13. Exobiology refers to the study of which of the following?
[A] Organism
[B] Endodermis
[C] Life in the air
[D] Life on the other planets
Show Answer
Correct Answer: D [Life on the other planets]
Notes:
Exobiology is the study of the origin, evolution and distribution of life in the context of cosmic evolution.
14. Robert Hooke is known for which of the following works?
[A] how messages pass between nerve cells in mammals
[B] first use of the word cell
[C] theory of punctuated equilibrium
[D] aquatic ape theory
Show Answer
Correct Answer: B [first use of the word cell]
Notes:
Robert Hooke is known for his discovery of the law of elasticity (Hooke’s law), for his first use of the word cell in the sense of a basic unit of organisms, and for his studies of microscopic fossils, which made him an early proponent of a theory of evolution.
15. Germplasm theory was given by which of the following biologists?
[A] August Weismann
[B] Georges Cuvier
[C] Arthur Tansley
[D] None of these
Show Answer
Correct Answer: A [August Weismann]
Notes:
Germ-plasm theory, the concept of the physical basis of heredity, articulated by the 19th century biologist August Weismann.
16. Which of the following class of leucoplasts is responsible for fat storage?
[A] Amyloplast
[B] Proteinoplasts
[C] Aleuroplasts
[D] Elaioplasts
Show Answer
Correct Answer: D [Elaioplasts]
Notes:
Leucoplast is colorless or non-pigmented in nature. It is used for storage. Amyloplasts store starch, proteinoplasts and aleuroplasts as well as modify proteins.
17. Which of the following is not caused by bacteria?
[A] Typhoid
[B] Tetanus
[C] Plague
[D] Chicken pox
Show Answer
Correct Answer: D [Chicken pox]
Notes:
Chickenpox is a contagious disease caused by the varicella-zoster virus (VZV).
18. Which of the following pigments gives the yellow colour to leaves, fruits and flowers?
[A] Chlorophyll
[B] Haemoglobin
[C] Anthocyanin
[D] Xanthophyll
Show Answer
Correct Answer: D [Xanthophyll]
Notes:
Xanthophyll is the pigment that provides yellow color to leaves, fruits, and flowers. Here Xanthos stands for yellow, phyllon means leaf.
19. The energy gained during aerobic respiration is how many times more than that of anaerobic respiration?
[A] 8
[B] 12
[C] 19
[D] 32
Show Answer
Correct Answer: C [19]
Notes:
The energy gained during aerobic respiration is 19 times more than that of anaerobic respiration because In aerobic respiration 38 ATP per glucose is produced but in anaerobic respiration, only 2 ATP per glucose is produced.
20. The nutritive tissue surrounding the embryo in certain seeds is called__.
[A] Protoplasm
[B] Pericarp
[C] Ectoderm
[D] Perisperm
Show Answer
Correct Answer: D [Perisperm]
Notes:
The nutritive tissue surrounding the embryo in certain seeds is called Perisperm.
