31. Which of the following is not found in the axon?
[A] Endoplasmic reticulum
[B] Neurofibrils
[C] Mitochondria
[D] Microtubules
Show Answer
Correct Answer: A [Endoplasmic reticulum]
Notes:
The endoplasmic reticulum is not found in the axon as it does not synthesize proteins. An axon contains mitochondria, neurofibrils, and microtubules, and the cytoplasm of an axon is called axoplasm.
32. Which of the following is included in the axial skeleton?
[A] Skull
[B] Vertebral Column
[C] Ribs and Sternum
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Skeletal elements that are present along the longitudinal axis of the body. The axial skeleton consists of 80 bones, including the skull, vertebral column, ribs, and sternum.
33. What is another name for the bulbourethral gland?
[A] Meibomian gland
[B] Prostate gland
[C] Perineal gland
[D] Cowper’s gland
Show Answer
Correct Answer: D [Cowper’s gland]
Notes:
Cowper’s gland is another name for the bulbourethral gland. Cowper’s glands are pea-sized glands. They are located below the prostate gland in the male reproductive system.
34. Which of the following is not an endoparasite?
[A] Ticks
[B] Tapeworms
[C] Liver fluke
[D] Roundworm
Show Answer
Correct Answer: A [Ticks]
Notes:
Anaplasmosis, babesiosis, ehrlichiosis, tularemia, tick-borne relapsing fever are diseases caused by ticks. Ticks are small, blood-sucking bugs.
35. Which of the following diseases is caused by protozoa?
[A] Whooping cough
[B] Amoebic dysentery
[C] Measles
[D] Athlete’s foot
Show Answer
Correct Answer: B [Amoebic dysentery]
Notes:
Amoebic dysentery diseases are caused by the protozoan parasite Entamoeba histolytica.
36. The number of sex chromosomes in the zygote of humans is __
[A] 2
[B] 1
[C] 3
[D] 4
Show Answer
Correct Answer: A [2]
Notes:
The number of sex chromosomes in the zygote of humans is 2.
37. Sugar crops to produce __
[A] biomethane
[B] bioethanol
[C] biobutanol
[D] None of these
Show Answer
Correct Answer: B [bioethanol]
Notes:
Bioethanol is produced by fermentation of residues from corn, potatoes, cereals, sugar beets, sugarcane and vegetables.
38. Who among the following did the mapping of the human genome?
[A] Oswald Avery
[B] James Watson
[C] Linda Buck Born
[D] Rachel Carson
Show Answer
Correct Answer: B [James Watson]
Notes:
James Watson did the mapping of the human genome. The complete set of nucleic acid sequences for humans encoded as DNA within 23 chromosome pairs in the cell nucleus and a small DNA molecule found within individual mitochondria is called the human genome.
39. Transgenic plants have desirable traits like __
[A] harmful genes
[B] herbicide resistance
[C] lactose intolerance
[D] complementary genes
Show Answer
Correct Answer: B [herbicide resistance]
Notes:
Transgenic plants have desirable traits like herbicide resistance. The inherited ability of an individual plant to survive the application of a herbicide that would kill a general population of the same species is called herbicide resistance.
40. What is thick vein present in the middle of the leaf called?
[A] Leaf venation
[B] Parallel venation
[C] Midrib
[D] Reticulate
Show Answer
Correct Answer: C [Midrib]
Notes:
A thick vein seen in the middle of the leaf is called the midrib. Pinnately veined leaves have one large central vein, called the midrib, which extends from the base of the blade to its tip. Other large veins branch off on each side of the midrib. The leaves of beech, birch, and elm trees have such a vein pattern.
