11. Which of the following classes belongs to an Octopus?
[A] an arthropod
[B] an echinoderm
[C] a heimchordate
[D] a mollusc
Show Answer
Correct Answer: D [a mollusc]
Notes:
The octopus is a soft-bodied, eight-limbed mollusc of the order Octopoda. Around 300 species are recognised, and the order is grouped within the class Cephalopoda with squids, cuttlefish, and nautiloids.
12. Which branch of medicine deals with the scientific study of the structure of teeth and diseases associated with it?
[A] Virology
[B] Opthalmology
[C] Cosmology
[D] Odontology
Show Answer
Correct Answer: D [Odontology]
Notes:
Odontology is a branch of medicine which deals with the structure and diseases related to the teeth.
13. 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.
14. 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.
15. 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.
16. Name the signal that helps the protein to move in or out of the nucleus?
[A] Notch signal
[B] Paracrine signal
[C] Nuclear localization signal
[D] Chemical signals
Show Answer
Correct Answer: C [Nuclear localization signal]
Notes:
Nuclear localization signals are also known as nuclear-export signals. It helps in importing and exporting proteins into the nucleus through nuclear pores. These signals are the sequence of specific amino acids present on the protein.
17. How many cells are in the human brain?
[A] roughly 171 billion cells
[B] roughly 200 billion cells
[C] roughly 151 billion cells
[D] roughly 250 billion cells
Show Answer
Correct Answer: A [ roughly 171 billion cells]
Notes:
The average male brain contains about 171 billion cells, including about 86 billion neurons.
18. Which of the following can affect proteins and nucleic acids, but not viruses?
[A] Denaturation
[B] Enzyme treatment
[C] Pressure
[D] All of these
Show Answer
Correct Answer: D [All of these]
Notes:
Because it affects proteins upon denaturation, this nuclease enzymes affect nucleic acids and the pressure will affect the structure but not the virus.
19. Which of the following is a characteristic of Kingdom Plantae?
[A] They are non-motile
[B] They make their own food hence are called autotrophs
[C] It contain photosynthetic pigments called chlorophyll present in the plastids
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
The Plant Kingdom has the following distinctive features:They are motionless, they make their own food, hence they are called autotrophs, they reproduce asexually by vegetative propagation or sexually, these are multicellular eukaryotes, the plant cell has an outer cell wall and a large central vacuole, Plastids in plants contain photosynthetic pigments called chlorophyll, they have separate organs for anchoring, reproduction, support and photosynthesis.
20. Which of the following is a characteristic of angiosperms?
[A] Seed-bearing plants
[B] Seeds are enclosed within fruits
[C] Both 1 & 2
[D] Neither 1 nor 2
Show Answer
Correct Answer: C [Both 1 & 2]
Notes:
Characteristics of angiosperms: Seed plants, seeds are sealed inside the fruit, presence of well differentiated plant body, produce flowers during their lifetime, presence of two subtypes – monocotyledonous and dicotyledonous
