31. Neutrophils, basophils, lymphocytes, eosinophils, and monocytes are examples of __.
[A] Physical barrier
[B] Cellular barriers
[C] Cytokine barriers
[D] Physiological barriers
Show Answer
Correct Answer: B [Cellular barriers]
Notes:
Neutrophils, basophils, lymphocytes, eosinophils, and monocytes are examples of Cellular barriers.
32. Which of the following cells of the immune system does not perform phagocytosis?
[A] Macrophage
[B] Neutrophil
[C] Eosinophil
[D] Basophil
Show Answer
Correct Answer: D [Basophil]
Notes:
Basophils are a type of white blood cell. They have the ability to help detect and destroy some early cancer cells.
33. It filters your blood, and the tube returns essential substances to your blood and removes waste, called __
[A] Secretion
[B] Tubular Reabsorption
[C] Glomerular Filtration
[D] None of these
Show Answer
Correct Answer: C [Glomerular Filtration]
Notes:
Glomerular Filtration filters your blood, and the tube returns essential substances to your blood and removes waste.
34. Which gland is also known as the “third eye”?
[A] Adrenal glands
[B] Gonads
[C] Pineal gland
[D] None of these
Show Answer
Correct Answer: C [Pineal gland]
Notes:
The pineal gland is also known as the “third eye”. It is located between the two halves of the brain.
35. What cannot sperm do in the absence of acrosome?
[A] Cannot penetrate the egg
[B] Cannot get energy
[C] Cannot get food
[D] Cannot swim
Show Answer
Correct Answer: A [Cannot penetrate the egg]
Notes:
The acrosome contains digestive enzymes. Digestive enzymes break down the outer membrane of the ovum. In the absence of acrosome, sperm cannot enter the egg.
36. Lassa and Ebola are emergent viruses in W. Africa. What is their origin?
[A] Humans
[B] Primates
[C] Fruit bats
[D] Pigs
Show Answer
Correct Answer: C [Fruit bats]
Notes:
Lassa and Ebola are emergent viruses in W. Africa originated by Fruit bats. Ebola hemorrhagic fever is caused by Ebola virus infection.
37. The transfer of genetic traits from parents to their offspring, and these offspring receive all the genetic information from their parents is called__
[A] Inheritance
[B] Genetics
[C] Heredity
[D] None of these
Show Answer
Correct Answer: A [Inheritance]
Notes:
The transfer of genetic traits from parents to their offspring, and these offspring receive all the genetic information from their parents is called Inheritance.
38. Which of the following is an example of a loose association of nitrogen-fixing bacteria?
[A] Rhizobium
[B] Blue-Green algae
[C] Azotobacter
[D] Azospirillum
Show Answer
Correct Answer: D [Azospirillum]
Notes:
Azospirillum is an example of a loose association of nitrogen-fixing bacteria. Azotobacter is an example of Free-Living Nitrogen-Fixing Bacteria. Rhizobium is an example of Symbiotic Nitrogen-Fixing Bacteria. Blue-Green alga is an example of Symbiotic Nitrogen-Fixing Cyanobacteria.
39. Chicken Pox is caused by which micro-organism?
[A] Virus
[B] Bacteria
[C] Protozoa
[D] Fungus
Show Answer
Correct Answer: A [Virus]
Notes:
Chickenpox, also known as varicella, is a highly contagious infection caused by the varicella zoster virus. The disease results in a characteristic skin rash that forms small, itchy blisters, which eventually scab over. It is an airborne disease which spreads easily through the coughs and sneezes of an infected person.
40. Muscle fatigue occurs due to accumulation of ____:
[A] Carbonic Acid
[B] Lactic Acid
[C] ATP
[D] ADP
Show Answer
Correct Answer: B [Lactic Acid]
Notes:
Muscle fatigue refers to the decline in muscle force generated over time. Several factors contribute to muscle fatigue, the most important being lactic acid accumulation. Lactic acid is formed and accumulated in the muscle under conditions of high energy demand, rapid fluctuations of the energy requirement and insufficient supply of O2.
