11. Which among the bio fertilizer uses earthworm?
[A]
Rhizobium biofertilizer
[B] Vermi composting
[C] Azospirillium biofertilizer
[D] None of the above
Show Answer
Correct Answer: B [Vermi composting]
Notes:
Vermicomposting is the compost prepared using the earthworms . It is an appropriate technique for efficient recycling of animal wastes, crop residues, and agro-industrial wastes.
12. Which of the following possesses the characteristics of both plants and animals?
[A] Azolla
[B] Lycopodium
[C] Euglena
[D] Sphagnum
Show Answer
Correct Answer: C [Euglena
]
Notes:
Euglena is an example of the Protista kingdom and has both plant and animal characteristics.
13. Which cell organelle controls the entry and exit of molecules into and out of the cell?
[A] Golgi bodies
[B] Cell membrane
[C] Lysosomes
[D] Mitochondria
Show Answer
Correct Answer: B [Cell membrane]
Notes:
A plasma membrane is made up of lipids and proteins. The composition can fluctuate depending on the fluidity in the plasma membrane, the external environment, and the different stages of cell development.
14. When is reverse transcriptase a useful enzyme?
[A] an RNA virus converts its RNA to DNA
[B] there are no host cells present
[C] nutrients are scarce
[D] spikes are forming in the new virus
Show Answer
Correct Answer: A [an RNA virus converts its RNA to DNA]
Notes:
Reverse transcriptase is a useful enzyme to have when an RNA virus converts its RNA to DNA. Reverse transcriptase converts RNA sequences into cDNA sequences that are capable of being inserted into different regions of the genome.
15. 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.
16. Which Viruses are Relatively Thermostable?
[A] Human immunodeficiency virus
[B] Rubella virus
[C] Hepatits A virus
[D] Influenza virus
Show Answer
Correct Answer: C [Hepatits A virus]
Notes:
Hepatitis A virus are Relatively Thermostable. A highly contagious liver infection caused by the hepatitis A virus.
17. Which of the following plant group requires both land and water to complete its life cycle?
[A] Tracheophyta
[B] Pteridophyta
[C] Thallophyta
[D] Bryophyta
Show Answer
Correct Answer: D [Bryophyta]
Notes:
Bryophyta plant group requires both land and water to complete its life cycle. Bryophytes are an informal division consisting of 3 groups of non-vascular plants, namely mosses, liverworts and hornworts.
18. What does it mean for pea grains to be coiled around any support?
[A] Seismonasty
[B] Thigmotaxis
[C] Gravitropism
[D] Thigmotrophism
Show Answer
Correct Answer: D [Thigmotrophism]
Notes:
An example of tropism is thigmotropism, which is a plant’s response to moving toward or away from environmental stimuli.
19. What is the meaning of invertebrate from the following?
[A] lacks of backbone
[B] non cartilaginous
[C] bony vertebrates
[D] none of these
Show Answer
Correct Answer: A [lacks of backbone]
Notes:
An invertebrate is any animal that lacks a vertebral column, or backbone, as opposed to cartilaginous or bony vertebrae.
20. What is the class of Mytilus?
[A] Arthropoda
[B] Amphineura
[C] Bivalvia
[D] None of these
Show Answer
Correct Answer: C [Bivalvia]
Notes:
Bivalvia is the class of Mytilus. Mytilus is a cosmopolitan genus of medium to large-sized edible, mainly saltwater mussels.
