31. Monocytes differentiate into which kind of phagocytic cells?
[A] Neutrophil
[B] B cell
[C] Macrophage
[D] T cell
Show Answer
Correct Answer: C [Macrophage]
Notes:
Macrophages are specialized cells that are involved in the detection, phagocytosis, and destruction of bacteria and other harmful organisms. A monocyte is a type of white blood cell and it is a phagocyte.
32. Which of the following is the long muscular tube that connects the small intestine to the rectum?
[A] Colon
[B] Gallbladder
[C] Pancreas
[D] Esophagus
Show Answer
Correct Answer: A [Colon]
Notes:
The colon is the long muscular tube that connects the small intestine to the rectum.
33. Which of the following disease is transmitted by animal bite and saliva?
[A] Rabies
[B] Tuberculosis
[C] Tetanus
[D] AIDS
Show Answer
Correct Answer: A [Rabies]
Notes:
Rabies disease is transmitted by animal bites and saliva.
34. Which of the following are bacterial diseases in Humans?
[A] Pulmonary Tuberculosis
[B] Cholera
[C] Leprosy
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Pulmonary Tuberculosis, Cholera, and Leprosy are bacterial diseases in Humans.
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. Crossing-over occurs during ____:
[A] Diplotene
[B] Pachytene
[C] Leptotene
[D] Zygotene
Show Answer
Correct Answer: B [Pachytene]
Notes:
Chromosomal crossover (or crossing over) is the exchange of genetic material between homologous chromosomes that results in recombinant chromosomes. It is one of the final phases of genetic recombination, which occurs during prophase I of meiosis (pachytene) during a process called synapsis.
37. Self pollination will lead to
____:
[A] Inbreeding
[B] Overbreeding
[C] Outbreeding
[D] Rare breeding
Show Answer
Correct Answer: A [Inbreeding]
Notes:
Self-pollination can lead to inbreeding depression, or the reduced vitality in the species along with reduced chances of variation among members of species. This is why many flowers that could potentially self-pollinate have a built-in mechanism to avoid it.
38. ____ is a straw coloured, viscous fluid constituting nearly 55 per cent of the blood:
[A] Plasma
[B] Formed Elements
[C] Blood Groups
[D] Coagulation of Blood
Show Answer
Correct Answer: A [Plasma]
Notes:
Plasma is a straw coloured, viscous fluid constituting nearly 55 per cent of the blood. 90-92 per cent of plasma is water and proteins contribute 6-8 per cent of it. Fibrinogen, globulins and albumins are the major proteins. Fibrinogens are needed for clotting or coagulation of blood; while, globulins primarily are involved in defense.
39. The narrowest and most numerous tubes of lungs are termed as ____:
[A] Bronchus
[B] Hilum
[C] Bronchioles
[D] Alveoli
Show Answer
Correct Answer: C [Bronchioles]
Notes:
The respiratory bronchioles are the narrowest airways of the lungs, one fiftieth of an inch across. The bronchi divide many times before evolving into the bronchioles. The bronchioles deliver air to the exchange surfaces of the lungs.
40. Myrmecology is study of ____:
[A] Ants
[B] Insects
[C] Arthropods
[D] Crustaceans
Show Answer
Correct Answer: A [Ants]
Notes:
Myrmecology is the scientific study of ants, a branch of entomology. The word myrmecology was coined by William Morton Wheeler (1865–1937), although human interest in the life of ants goes back further, with numerous ancient folk references.
