31. What happens if your adrenal glands are not working properly?
[A] low blood pressure
[B] low blood levels of sugar
[C] high blood levels of potassium
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
If your adrenal glands are not working properly resulting in low blood pressure, low blood sugar levels, and high levels of potassium in the blood.
32. What is the function of Sertoli cells in the male reproductive system?
[A] help in the erection of the penis
[B] secrete male sex hormones
[C] carrier of man’s genes
[D] provide nutrition to germ cells
Show Answer
Correct Answer: D [provide nutrition to germ cells]
Notes:
Providing nutrition to germ cells is the function of Sertoli cells in the male reproductive system.
33. Ringworm is caused by __
[A] Cryptosporidium parvum
[B] Piroplasmorina
[C] Hypophosphataemia
[D] Trichophyton verrucosum
Show Answer
Correct Answer: D [Trichophyton verrucosum]
Notes:
Ringworm is a contagious skin disease most often caused by Trichophyton verrucosum.
34. What is the nitrogen-fixing symbiotic organism present in Azolla?
[A] nostoke
[B] anabaena
[C] aulosira
[D] azospirillum
Show Answer
Correct Answer: B [anabaena]
Notes:
Anabaena is the nitrogen-fixing symbiotic organism present in Azolla. Anabaena is a genus of filamentous cyanobacteria that exist as plankton.
35. Which of the following are the benefits of vermicomposting?
[A] develops roots of the plants
[B] increases the fertility and water-resistance of the soil
[C] Both 1 and 2
[D] Neither 1 nor 2
Show Answer
Correct Answer: C [Both 1 and 2]
Notes:
The benefits of vermicomposting are to develop roots of the plants, improve the physical structure of the soil, and increase the fertility and water-resistance of the soil.
36. GM rice is enriched with which of the following vitamin?
[A] K
[B] E
[C] A
[D] D
Show Answer
Correct Answer: C [A]
Notes:
GM rice is enriched with vitamins A. Genetically modified rice are strains of rice that have been genetically modified.
37. Which organism’s plasmid was first used to construct recombinant DNA?
[A] Cyanobacteria
[B] Bacillus subtilis
[C] Saccharomyces cerevisiae
[D] Salmonella typhimurium
Show Answer
Correct Answer: B [Bacillus subtilis]
Notes:
Bacillus subtilis organism’s plasmid was first used to construct recombinant DNA.
38. What is the transplantation of graft between genetically identical individuals?
[A] Autograft
[B] Xenograft
[C] Iso-graft
[D] Allograft
Show Answer
Correct Answer: C [Iso-graft]
Notes:
An isogenic graft or Isograft is a graft between genetically identical individuals (i.e. monozygotic twins). This type of graft donot pose any form of tissue rejection threat by recipient’s body.
39. The hydrophilic nature of DNA is due to the presence of ____:
[A] A number of hydrogen bonds
[B] Phosphate group
[C] Thymine base
[D] Deoxyribose sugar
Show Answer
Correct Answer: A [A number of hydrogen bonds]
Notes:
The phosphate groups on DNA are ionic and charged. Each phosphate group on the DNA backbone has one unit of negative charge (-1). Charged molecules attract water and are hydrophilic. DNA has two hydrophilic polar external backbones made of sugars and phosphate groups joined by ester bonds. Therefore, DNA as nucleic acid is characterized by presence of phosphodiester bond.
40. Dormancy period of animals during winter season is called ____:
[A] Aestivation
[B] Mutation
[C] Hibernation
[D] Regeneration
Show Answer
Correct Answer: C [Hibernation]
Notes:
Hibernation is a state of inactivity and metabolic depression in endotherms. Hibernation refers to a season of heterothermy that is characterized by low body temperature, slow breathing and heart rate, and low metabolic rate. Often associated with cold temperatures, the purpose of hibernation is to conserve energy during a period when sufficient food is scarce and outside temperature is low.
