11. Which of the following is a morphological feature of paramyxovirus?
[A] Fragile viruses often visualised with RNA spewing from the inside
[B] Elongate viruses
[C] Icosahedral viruses with envelope
[D] Very large viruses
Show Answer
Correct Answer: A [Fragile viruses often visualised with RNA spewing from the inside]
Notes:
Paramyxovirus are a family of single-stranded RNA viruses that cause a variety of infections in vertebrates. Many important human diseases are caused by paramyxoviruses.
12. Which of the following oncogenic virus was first detected?
[A] Rous sarcoma virus
[B] Epstein-Barr virus
[C] Herpes simplex virus type 2
[D] Human T cell leukaemia virus
Show Answer
Correct Answer: A [Rous sarcoma virus]
Notes:
Rous sarcoma virus(RSV) was discovered in 1911 by Peyton Rous.
13. Which of the following is not an example of bryophytes?
[A] Marchantia
[B] Funaria
[C] Sphagnum
[D] Selaginella
Show Answer
Correct Answer: D [Selaginella]
Notes:
Selaginella is not an example of bryophytes. Selaginella, Equisetum, Pteris, etc.are examples of Pteridophyta.
14. Where is the genetic system located in prokaryotes?
[A] nucleoid
[B] chromatin
[C] nuclear material
[D] all of these
Show Answer
Correct Answer: D [all of these]
Notes:
The genetic system located in prokaryotes in nucleoid, chromatin and nuclear material.
15. Who is known as the “Father of Phycology”?
[A] Fritsch
[B] Papenfus
[C] Smith
[D] Morris
Show Answer
Correct Answer: A [Fritsch]
Notes:
FE Fritsch (1935) in his book “Structure and Reproduction of Algae” divided algae into the following eleven classes. It is mainly based on pigmentation, reserve food and flagellar, thallus structure, mode of reproduction, and life cycle. Hence he is known as the father of algae.
16. Sterile stamens are called which of the following?
[A] Epipetalous
[B] Monadelphous
[C] Staminode
[D]
Epiphyllous
Show Answer
Correct Answer: C [Staminode]
Notes:
A staminode often has rudimentary, sterile or abortive stamens that do not produce pollen.
17. The sequence of events, which is carried out from the time of pollen deposition over the stigma and till the entry of pollen tube inside the ovule is called__.
[A]
pollination
[B] fertilization
[C] pollen-pistil interaction
[D] all of these
Show Answer
Correct Answer: C [pollen-pistil interaction]
Notes:
The sequence of events, which is carried out from the time of pollen deposition over the stigma and till the entry of pollen tube inside the ovule is called pollen-pistil interaction.
18. What type of stem is a rhizome?
[A] non-green with distinct nodes and internodes
[B] auxiliary as well as apical buds
[C] brownish in colour
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
The rhizomes are non-green with distinct nodes and internodes, auxiliary as well as apical buds, and are brown in color.
19. Which of these carry water into a leaf?
[A] Leaf blade
[B] Veins
[C] Chlorophyll
[D] Roots
Show Answer
Correct Answer: B [Veins ]
Notes:
Veins carry water into a leaf. The veins in leaves are made up of two major tissues xylem and phloem.
20. In which of the following are gills hidden?
[A] Cryptobranchidae
[B] Ambystomatida
[C] Amphiumidae
[D] Plethodontidae
Show Answer
Correct Answer: A [Cryptobranchidae]
Notes:
In Cryptobranchidae gills are hidden. Hellbenders belong to the Cryptobranchidae family. They contain the largest living salamanders.
