31. Dirofilariasis is another name for an infection of which parasite?
[A] Heartworm
[B] Roundworm
[C] Hookworm
[D] Tapeworm
Show Answer
Correct Answer: A [Heartworm]
Notes:
Dirofilariasis is a disease caused by Dirofilaria worm infection. Dirofilaria immitis are also known as heartworm or dog heartworm.
32. Mendel did not give __.
[A] Concept of genes
[B] Concept of inheritance
[C] Concept of dominance
[D] Concept of chromosomes
Show Answer
Correct Answer: D [Concept of chromosomes]
Notes:
Mendel did not give the Concept of chromosomes. The chromosomal theory of inheritance was given by Boveri and Sutton.
33. 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.
34. In most species, mitochondrial DNA is passed down from which of the following?
[A] DNA
[B] Mother and Father
[C] Father
[D] Mother
Show Answer
Correct Answer: D [Mother]
Notes:
In most of the species, mitochondrial DNA is passed down from Mother.
35. 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.
36. In which of the following parts of the human digestive system is the digestion of food completed?
[A] Small intestine
[B] Large intestine
[C] Mouth
[D] Stomach
Show Answer
Correct Answer: A [Small intestine]
Notes:
Small intestine has three parts – duodenum, jejunum, and ileum. The maximum digestion of food takes place in the duodenum. While the digestion of food is completed in jejunum. The maximum absorption of food takes place in ileum.
37. Self pollination will lead to
____:
[A] Inbreeding
[B] Overbreeding
[C] Outbreeding
[D] Rare breeding
Show Answer
Correct Answer: A [Inbreeding]
Notes:
Self-pollination can lead to inbreeding depression, or the reduced vitality in the species along with reduced chances of variation among members of species. This is why many flowers that could potentially self-pollinate have a built-in mechanism to avoid it.
38. Diaphragm is a means of contraception. It is fixed ____:
[A] Over cervix
[B] In the uterus
[C] In the fallopian tube
[D] None of the above
Show Answer
Correct Answer: A [Over cervix]
Notes:
The diaphragm is a barrier method of birth control. It is a reusable dome-shaped cup that covers a woman’s cervix, stopping sperm from joining an egg. In order for a diaphragm to work best, it must be used with spermicide (a cream or gel that kills sperm).
39. In a humans heart the bicuspid valve is situated between ____:
[A] Right auricle and right ventricle
[B] Postcaval and auricle
[C] Left auricle and left ventricle
[D] Right ventricle and pulmonary aorta
Show Answer
Correct Answer: C [Left auricle and left ventricle]
Notes:
Bicuspid valve is located between the left atrium and left ventricle. The mitral valve is also called the bicuspid valve because it contains two leaflets or cusps. It is on the left side of the heart and allows the blood to flow from the left atrium into the left ventricle.
40. The bark of willow tree is a source of which medicine?
[A] Paracetamol
[B] Aspirin
[C] Antiseptic
[D] Antacid
Show Answer
Correct Answer: B [Aspirin]
Notes:
The bark of the common Willow tree is the source of a wide range of phenolic glycosides, of which the most important is salicin. Salicin is metabolized into salicylic acid in the human body, and is a precursor of aspirin. It is used as a fever reducer, a mild pain reliever, and an anti-inflammatory.
