11. What is another name for cyanobacteria?
[A] Blue-green algae
[B] Protists
[C] Golden algae
[D] Slime moulds
Show Answer
Correct Answer: A [Blue-green algae]
Notes:
Cyanobacteria, also called blue-green algae, are microscopic organisms found naturally in all types of water.
12. Which statement is true for the capsid?
[A] It consists of capsomeres
[B] This the outermost layer of most viruses
[C] It protects genetic material
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
A capsid is the protein shell of a type of virus, which encloses its genetic material.
13. Which of the following is the function of contractile vacuole?
[A] To carry out pinocytosis
[B] To carry out metabolic process
[C] To pump excess water out of the cell
[D] To carry out phagocytosis
Show Answer
Correct Answer: C [To pump excess water out of the cell]
Notes:
Contractile vacuoles that regulate intracellular water balance by storing and expelling excess water from the cell.
14. Which of the following virus has its envelope from the host cell nucleus?
[A] Paramyxoviruses
[B] Retroviruses
[C] Orthomyxoviruses
[D] Herpesviruses
Show Answer
Correct Answer: D [Herpesviruses]
Notes:
The Herpesviridae are a large family of DNA viruses. It causes infections and some diseases in animals, including humans. Herpes viruses are divided into three groups: α herpesviruses, herpes simplex virus types 1 and 2.
15. In cell culture, the measles virus can lead to which of the following?
[A] nuclear pyknosis
[B] transformation of cells
[C] syncytium formation
[D] rounding and aggregation of cells
Show Answer
Correct Answer: C [syncytium formation]
Notes:
In cell culture, the measles virus can lead to syncytium formation.
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 bacteria supply ammonia to soil?
[A] Rhizobium
[B] Lactobacillus
[C] Streptomyces
[D] Campylobacter
Show Answer
Correct Answer: A [Rhizobium]
Notes:
Rhizobium is an organic fertilizer. Biofertilizers are substances that contain microorganisms that, when applied to the soil, increase the amount of nutrients. It also enhances the growth of plants.
18. Which of the following is not a characteristic of Bryophyta?
[A] Motile sperms
[B] Presence of archegonium
[C] Presence of archegonium
[D] Photosynthetically independent sporophyte
Show Answer
Correct Answer: D [Photosynthetically independent sporophyte]
Notes:
Motile sperms, the Presence of archegonium, and the Presence of archegonium are characteristics of Bryophyta.
19. What would you call the study of fish?
[A] Ichthyology
[B] Herpetology
[C] Saurology
[D] Ornithology
Show Answer
Correct Answer: A [Ichthyology]
Notes:
Ichthyology is the study of fish including bony fish, cartilaginous fish, and jawless fish.
20. Ruminants belong to which of the following order?
[A] Proboscida
[B] Artiodactyla
[C] Marsupials
[D] Edentata
Show Answer
Correct Answer: B [Artiodactyla]
Notes:
Ruminants belong to Artiodactyla order. Artiodactyla together with whales make up the order Cetartiodactyla. Artiodactyla includes omnivores and herbivores.
