31. What is the speed of nerve impulses?
[A] 60 m/s
[B] 0.5 – 130 m/s
[C] 10-30 m/s
[D] 50 -150 m/s
Show Answer
Correct Answer: B [0.5 – 130 m/s]
Notes:
The speed of nerve impulses is 0.5 – 130 m/s. A nerve impulse or action potential is an electrical signal. It travels through the membranes of neurons.
32. What are the shape of the malleus and aural bone marrow?
[A] Oval shaped
[B] Hammer shaped
[C] Horseshoe-shaped
[D] None of the above
Show Answer
Correct Answer: B [Hammer shaped]
Notes:
Hammer-shaped is the shape of the malleus and aural bone marrow. In the middle ear between the incus and the eardrum, malleus are found.
33. How does food move through your digestive tract?
[A] By gravity
[B] By wavelike muscle contractions
[C] By cilia
[D] By chemical absorption
Show Answer
Correct Answer: B [By wavelike muscle contractions]
Notes:
Food moves through your digestive system by wave-like muscle contractions.
34. Which hormone regulates adrenocorticotropin release in the pituitary gland?
[A] Thyrotropin releasing hormone
[B] Corticotropin releasing hormone
[C] Gonadotropin releasing hormone
[D]
Thyroid-stimulating hormone
Show Answer
Correct Answer: B [Corticotropin releasing hormone]
Notes:
The corticotropin-releasing hormone regulates adrenocorticotropin release in the pituitary gland.
35. Which organ is affected by Japanese encephalitis?
[A] brain and spinal cord
[B] lungs
[C] liver and pancreas
[D] heart
Show Answer
Correct Answer: A [brain and spinal cord]
Notes:
The Brain and spinal cord organs are affected by Japanese encephalitis. This is a viral infection caused by infected mosquitoes in Asia and the western Pacific.
36. Which of the following ringworm is also called Tinea barbae?
[A] Ringworm of Scalp
[B] Ringworm of Beard
[C] Ringworm of Body
[D] Ringworm of Groin
Show Answer
Correct Answer: B [Ringworm of Beard]
Notes:
The ringworm of Beard is also called Tinea barbae. This is a superficial fungal infection of the skin, hair, and hair follicles caused by dermatophytes.
37. The root nodules for nitrogen fixation of a non-legume tree are?
[A] Frankia
[B] Rhizobium
[C] Azotobacter
[D] Thiobacillus
Show Answer
Correct Answer: A [Frankia]
Notes:
The root nodules for nitrogen fixation of a non-legume tree are Frankia. It is a genus of nitrogen-fixing bacteria that live in symbiosis with actinorhizal plants.
38. Which of the following is a mobile genetic element?
[A] virus
[B] bacteria
[C] Transposons
[D] insertion sequence
Show Answer
Correct Answer: C [Transposons ]
Notes:
A transposon is a mobile genetic element. This is also known as jumping genes. A type of genetic material that can move around within a genome is called a mobile genetic element.
39. What is Alzheimer’s disease?
[A] It affects liver
[B] It is a disorder of the brain
[C] It affects kidney
[D] It affects human immune system
Show Answer
Correct Answer: B [It is a disorder of the brain]
Notes:
Alzheimer’s disease is a progressive neurologic disease of the brain leading to the irreversible loss of neurons and the loss of intellectual abilities, including memory and reasoning. These with time become severe enough to impede social or occupational functioning. Alzheimer’s disease is also known as simply Senile Dementia.
40. Which one of the following is commonly known as Pond Silk?
[A] Yeast
[B] Rhizopus
[C] Ulothrix
[D] Spirogyra
Show Answer
Correct Answer: D [Spirogyra]
Notes:
Pond silk is the common name of Spirogyra (algae) because it is very slimy in shape. It is also known as pond silk, water silk, pond scum or mermaid’s trees because of its bright green silky appearance. Its filaments shine like silk due to the presence of mucilage and spiral shaped chloroplast.
