11. Which of the following comprise plant decomposers?
[A] Monera and fungi
[B] Plantae and fungi
[C] Monera and Animalia
[D] Animalia and Protista
Show Answer
Correct Answer: A [Monera and fungi]
Notes:
Decomposers are a type of bacteria and fungi that break down dead and decaying organic matter into simpler things like carbon dioxide, water, simple sugars and mineral salts, and return nutrients to the soil.
12. Which sugar is present in DNA?
[A] Heptose
[B] Hexone
[C] Tetrose
[D] Pentose
Show Answer
Correct Answer: D [Pentose]
Notes:
Deoxyribose is present in DNA. It is also known as pentose sugar, consisting of 5 carbon atoms. The chemical formula of deoxyribose is C5H10O4. DNA is the genetic carrier in all living organisms. The full form of DNA is Deoxyribonucleic Acid.
13. The viruses in an attenuated vaccine?
[A] have no genome
[B] continue to replicate
[C] are usually larger than bacteria
[D] is altered with chemicals
Show Answer
Correct Answer: B [continue to replicate]
Notes:
The viruses in an attenuated vaccine continue to replicate. Attenuated vaccines do not usually cause disease like those caused by the wild form of the organism.
14. Which of the following viruses can rescue adenovirus in simian cells?
[A] Rabies
[B] Vaccinia
[C] Simian virus 40
[D] Cytomegalovirus
Show Answer
Correct Answer: C [Simian virus 40]
Notes:
Simian virus 40 (SV40) has been one of the most intensively studied animal viruses. Simian virus 40 has been used as a model eukaryotic promoter for the study of DNA sequence elements and cellular factors involved in transcriptional control and initiation.
15. Agar is obtained commercially__?
[A] Blue-green algae
[B] Red algae
[C] Brown algae
[D] Green algae
Show Answer
Correct Answer: B [Red algae]
Notes:
Agar is a jelly-like material obtained from red algae. The jelly content in algae is due to the presence of non-branched polysaccharides derived from the cell wall of red algae.
16. What is involved in the release of pollen grains?
[A] Pectin and cellulose
[B] Lignocellulose
[C] Pollenkit
[D] Sporopollenin
Show Answer
Correct Answer: D [Sporopollenin]
Notes:
Sporopollenin is the most chemically inert organic polymer. It is a major component of the tough outer (outer) walls of plant spores and pollen grains.
17. Cholera disease is caused by_?
[A] Fungi
[B] Virus
[C] Bacteria
[D] Protozoa
Show Answer
Correct Answer: C [Bacteria]
Notes:
Cholera is an acute diarrheal disease caused by infection of the intestine with Vibrio cholerae bacteria.
18. Who among the following is considered as the “Father of Indian Phycology”
[A] Prof. M.O.P. Iyenger
[B] Prof. J.N. Mishra
[C] Prof. R.R. Mishra
[D] Prof. R.N. Singh
Show Answer
Correct Answer: A [Prof. M.O.P. Iyenger]
Notes:
MOP Iyengar from Madras is considered the father of Indian Phycology. He discovered Fritschiella heterotrichus terrestrial algae.
19. Pollination is the process in which pollen grains are transferred from anther to ___.
[A] Stigma
[B] Anther
[C] Pistil
[D] Sepals
Show Answer
Correct Answer: A [Stigma]
Notes:
Pollination is the process in which pollen grains are transferred from anther to Stigma.
20. What does the lateral meristem provide to the plant?
[A] length of the plant
[B] thickness of the plant
[C] size of the internode
[D] strength to the plant
Show Answer
Correct Answer: B [thickness of the plant]
Notes:
Lateral meristem upsurges the thickness of the plant. It is existent in the radial portion of the stem or root.
