31. Which hormone enhances milk release from the mammary glands?
[A] Adrenocorticotrophic Hormone
[B] Pressor
[C] Prolactin
[D] Both 1 and 2
Show Answer
Correct Answer: C [Prolactin]
Notes:
The pituitary glands of animals such as cattle can be used for the extraction of hormones for medical purposes. Prolactin hormone enhances milk release from the mammary glands.
32. What is the purpose of cranial nerves in the human body?
[A] carry information from the brain to all parts of the body
[B] facilitate the sense of vision and smell
[C] muscle movement
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
The cranial nerves carry information from the brain to all parts of the body. It facilitates the sense of sight, smell, muscle movement and hearing.
33. What are the types of cells found in the retina?
[A] Purkinje cells
[B] Schwann cells
[C] Neuroglial cells
[D] Amacrine cells
Show Answer
Correct Answer: D [Amacrine cells]
Notes:
The amacrine cell is a type of cell found in the retina. Amacrine cells lie in the inner retina and make connections with bipolar cells and ganglion cells.
34. Why is corneal transplantation never rejected in humans?
[A] it consists of enucleated cells
[B] it is a non-living layer
[C] it has no blood supply
[D] its cells are least penetrable by bacteria
Show Answer
Correct Answer: C [it has no blood supply]
Notes:
Corneal transplantation is never rejected in humans because it has no blood supply.
35. The muscular diaphragm that controls the size of the pupil is __
[A] cornea
[B] ciliary muscles
[C] iris
[D] retina
Show Answer
Correct Answer: C [iris]
Notes:
The muscular diaphragm that controls the size of the pupil is the iris. The iris helps control the amount of light entering the eye by opening and closing the pupil.
36. Which of the following is best maintains intestinal health?
[A] Starches
[B] Vitamins
[C] Fiber
[D] Fat
Show Answer
Correct Answer: C [Fiber]
Notes:
Fiber maintains better intestinal health. Fiber is a type of carbohydrate that the body cannot digest.
37. Heart disease and High blood pressure are examples of which genetic disorder?
[A] Chromosomal Disorder
[B] Mitochondrial Inheritance
[C] Multifactorial Genetic Inheritance
[D] None of these
Show Answer
Correct Answer: C [Multifactorial Genetic Inheritance]
Notes:
Heart disease and High blood pressure are examples of Multifactorial Genetic Inheritance. It is also known as polygenic inheritance.
38. Which of the following is a free-living aerobic and non-photosynthetic nitrogen-fixing bacterium?
[A] Rhizobium
[B] Nostoc
[C] Azospirillum
[D] Azotobacter
Show Answer
Correct Answer: D [Azotobacter]
Notes:
Azotobacter is a free-living aerobic and non-photosynthetic nitrogen-fixing bacterium.
39. Which nematode infects the roots of tobacco plants?
[A] Meloidogyne incognitia
[B] Ditylenchus dipsaci
[C] Xiphinema index
[D] Nacobbus aberrans
Show Answer
Correct Answer: A [Meloidogyne incognitia]
Notes:
Meloidogyne incognita is a nematode that infects the roots of tobacco plants, also known as ‘root-knot nematodes’. It is a plant-parasitic nematode, affecting both monocot and dicotyledonous plants.
40. Which of the following are examples of hydrophilic molecules?
[A] sugar
[B] cellulose
[C] starch
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
A molecule whose interaction with water and other polar substances is more thermodynamically favorable than its interaction with oil or other hydrophobic solvents is called a hydrophilic molecule. Sugar, salt, starch, and cellulose are examples of hydrophilic molecules.
