31. Which is a symptom of labyrinthitis?
[A] Pain in the ear
[B] Permanent deafness
[C] Chronic inflammation
[D] All of the above
Show Answer
Correct Answer: B [Permanent deafness]
Notes:
Permanent deafness is a symptom of labyrinthitis. Labyrinthitis is an infection of the inner ear. It affects your balance. It is also called vestibular neuritis.
32. Which of the following are the characteristics of cardiac muscle?
[A] involuntary
[B] intrinsically controlled
[C] single nucleated
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
The four characteristics of cardiac muscle tissue cells are involuntary and intrinsically controlled, striated, branched and single nucleated.
33. Which of the following is a function of the heart?
[A] makes blood cells
[B] to pump blood throughout the body
[C] Both 1 and 2
[D] Neither 1 nor 2
Show Answer
Correct Answer: B [to pump blood throughout the body]
Notes:
The primary function of the human heart is to pump blood throughout the body.
34. Albumin is the most important protein in blood serum. It is produced by which of the following organs?
[A] Heart
[B] Lungs
[C] Liver
[D] Endocrine glands
Show Answer
Correct Answer: C [Liver]
Notes:
Albumin is the most important protein in blood serum. It is produced by Liver.
35. Which is the Growth hormone inhibiting hormone?
[A] FSH
[B] TRH
[C] GHRH
[D] Somatostatin
Show Answer
Correct Answer: D [Somatostatin]
Notes:
Somatostatin works against Growth Hormone (GHRH), hence it is known as Growth Inhibiting Hormone. It consists of two peptides of 14 and 28 amino acids and is released from neurosecretory nerves.
36. Which of the following is the division of human eggs?
[A] Holoblastic and unequal
[B] Meroblastic
[C] Holoblastic and equal
[D] Isoblastic
Show Answer
Correct Answer: A [Holoblastic and unequal]
Notes:
The division of human eggs is holoblastic and unequal. Holoblastic cleavage is observed in eggs that have a moderate to the sparse amount of yolk. Holoblastic cleavage is the complete division of an isolecithal or microlecithal egg into blastomeres.
37. What is the number of autosomes in a human primary sperm cell?
[A] 46
[B] 44
[C] 23
[D] 22
Show Answer
Correct Answer: B [44]
Notes:
44 is the number of autosomes in a human primary sperm cell. An autosome is a chromosome, which is not a sex chromosome.
38. The point mutation results in a change in the codon, which then codes for another amino acid is called __
[A] Silent mutation
[B] Nonsense mutation
[C] Missense mutation
[D] None of these
Show Answer
Correct Answer: C [Missense mutation]
Notes:
The point mutation results in a change in the codon, which then codes for another amino acid is called Missense mutation.
39. Which enzyme in the human body helps break down carbohydrates?
[A] Lipase
[B] Amylase
[C] Peptidase
[D] Protease
Show Answer
Correct Answer: B [Amylase]
Notes:
Proteases catalyse the breakdown of proteins into amino acids in the stomach and small intestine. Lipases catalyse the breakdown of fats and oils into fatty acids and glycerol in the small intestine. Amylase catalyses the breakdown of starch into maltose in the mouth and small intestine.
40. Which of the following plant hormones are incorrectly paired?
[A] Cytokinins- senescence
[B] Abscisic acid- transpiration
[C] Auxins- apical dominance
[D] Gibberlins- bud and seed dormancy
Show Answer
Correct Answer: B [Abscisic acid- transpiration]
Notes:
Abscisic acid also called plant stress hormone is responsible for responsible for dormancy of various types. It maintains dormancy in seeds and buds, stimulates the closing of stomata. Gibberellins are responsible for cell division and growth in cell size.
