11. Mitochondrial DNA in an individual comes from which of the following sources?
[A] Male parent
[B] Female parent
[C] Both parents
[D] Neither of the parents
Show Answer
Correct Answer: C [Both parents]
Notes:
Mitochondrial DNA is the small circular chromosome found inside mitochondria. The mitochondria, and thus mitochondrial DNA, are passed almost exclusively from mother to offspring through the egg cell. Electron microscopy reveals mitochondrial DNA in discrete foci.
12. The highest fat content is found in the milk of which of the following animals?
[A] Buffalo
[B] Cow
[C] Camel
[D] Reindeer
Show Answer
Correct Answer: A [Buffalo]
Notes:
Buffalo milk has the highest fat content, which is on average twice as high as that of cow milk. The fat-to-protein ratio in buffalo milk is about 2:1.
13. Why man cannot digest cellulose whereas cows can do so?
[A] Their gut contains certain bacteria capable of digesting cellulose
[B] They have a many-chambered stomach
[C] They have efficient grinding molars
[D] They produce enzyme cellulose which can digest cellulose
Show Answer
Correct Answer: A [Their gut contains certain bacteria capable of digesting cellulose]
Notes:
Unlike cows for example don’t have the necessary bacteria in their intestines that make the enzymes necessary to breakdown the 1-4 beta glucose bonds. So we cannot break down cellulose into its constituent glucose molecules as we do with starch.
14. Which vitamin helps in the clotting of blood?
[A] Vitamin C
[B] Vitamin B
[C] Vitamin K
[D] Vitamin E
Show Answer
Correct Answer: C [Vitamin K]
Notes:
Vitamin K helps in the clotting of blood preventing excessive leakage of blood.
Extra info: Its name is derived from German which means Koagulationsvitamin.
15. Who gave theory of photosynthesis?
[A] Maurice Hilleman
[B] Jack Horner
[C] Jan Ingenhousz
[D] Franz Mesmer
Show Answer
Correct Answer: C [Jan Ingenhousz]
Notes:
Jan Ingenhausen is a Dutch-born British physician and scientist, best known for his discovery of the process of photosynthesis, by which green plants absorb carbon dioxide and release oxygen in sunlight.
16. Plants that reproduce by spores are classified into which of the following?
[A] Bryophytes
[B] Sporophytes
[C] Cryptogams
[D] Thallophytes
Show Answer
Correct Answer: C [Cryptogams]
Notes:
A cryptogam is a plant or plant-like organism that reproduces by spores without flowers or seeds.
17. A single polar flagellum is known as__?
[A] monotrichous
[B] lophotrichous
[C] amphitrichous
[D] none of these
Show Answer
Correct Answer: A [monotrichous]
Notes:
Monotrichous bacteria have a single flagellum. Lophotrichous bacteria have multiple flagella located at the same location on bacterial surfaces that work together to steer the bacteria in the same direction.
18. Vaucheria and Chara are examples of?
[A] Euglenophyta
[B] Coenocytic
[C] Rhodophyta
[D] None of these
Show Answer
Correct Answer: B [Coenocytic]
Notes:
No septa are found in Vaucheria except in the reproductive stage. Many of its nuclei are moved around which is known as the alga coenocytic thallus.
19. Heteromorphic alternation of generation is commonly found in__?
[A] Algae
[B] Fungi
[C] Bryophyta
[D] All the above
Show Answer
Correct Answer: C [Bryophyta]
Notes:
Heteromorphic alternation of generation is commonly found in Bryophyta. Bryophytes are small, non-vascular plants, examples of mosses, liverworts, and hornworts.
20. 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.
