31. What is the difference between compact bone and spongy bone?
[A] They have different bone marrow
[B] They are made of different materials
[C] They have different sizes of bone cells
[D] They have different arrangement of bone cells
Show Answer
Correct Answer: D [They have different arrangement of bone cells]
Notes:
The cells in the compact bone are packed closely together. This makes the bone very strong. For this reason, compact bone is located outside the bones. The spongy bone cells are dilated, which allows blood-filled canals to run through the spongy bone. The spongy bone is found at the end of long bones.
32. What is the name of the only moving bone in the human skull?
[A] Ethmoid bone
[B] Mandible bone
[C] Nasal bone
[D] Lacrimal bone
Show Answer
Correct Answer: B [Mandible bone]
Notes:
The mandible is the largest bone in the human skull. It holds the lower teeth in place, aids in chewing, and lines the lower jaw. The mandible is the only movable bone in the human skull.
33. What is the function of systemic circulation?
[A] oxygenated blood is pumped from the heart to every organ
[B] carrying deoxygenated blood away from the heart
[C] oxygenated blood is supplied to the heart
[D] None of the above
Show Answer
Correct Answer: A [oxygenated blood is pumped from the heart to every organ]
Notes:
Systemic circulation is another part of the circulation where oxygenated blood is pumped from the heart to every organ and tissue in the body, and deoxygenated blood returns to the heart again.
34. Which of the following is the place of development of the embryo?
[A] Uterus
[B] Fallopian tubes
[C] A pair of ovaries
[D] Vagina
Show Answer
Correct Answer: A [Uterus]
Notes:
The uterus is the place of development of the embryo. This is a hollow muscular organ located in the female pelvis between the bladder and rectum.
35. 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.
36. The corpus luteum is the source of secretion of:
[A] LH
[B] Estradiol
[C] Estrogen
[D] Progesterone
Show Answer
Correct Answer: D [Progesterone]
Notes:
The corpus luteum is the source of secretion of Progesterone. Progesterone is a hormone released by the ovaries.
37. What is Campylobacter abortion in animals?
[A] Abortions after 4-8 months of pregnancy
[B] incubation period is generally 1-2 weeks
[C] abortion in late pregnancy
[D] All of the above
Show Answer
Correct Answer: C [abortion in late pregnancy]
Notes:
Ovine campylobacteriosis is an infectious disease that causes miscarriage in late pregnancy. It is caused by the bacteria Campylobacter fetus.
38. Which chemical is used to obtain a precipitate of pure DNA?
[A] Methanol
[B] Ether
[C] HCl
[D] Ethanol
Show Answer
Correct Answer: D [Ethanol]
Notes:
Ethanol is used to obtain a precipitate of pure DNA. Renewable fuel made from corn and other plant materials is called ethanol.
39. ____ being a higher category, is the assemblage of families which exhibit a few similar characters:
[A] Class
[B] Species
[C] Genus
[D] Order
Show Answer
Correct Answer: D [Order]
Notes:
Order is an assemblage of families which exhibit a few similar characters. The similar characters are less in number as compared to different genera included in a family. A class includes one or more orders.
40. Which is the effect of antigen in an ill person?
[A] It increases the production of antibiotics
[B] It increases the production of W.B.C.
[C] It increases the production of anti-serum against bacteria
[D] It prevents the growth of bacteria
Show Answer
Correct Answer: A [It increases the production of antibiotics]
Notes:
Vaccines containing antigens are introduced into the body, stimulating the immune system response by instructing B cells, with assistance from T cells, to produce antibodies. Antibodies are produced to fight the weakened or dead viruses in the vaccine. The immune system prepares to destroy real and stronger viruses in the future. When new antigens enter the body, white blood cells called macrophages engulf them; process the information contained in the antigens, and send it to the T cells to mobilise immune system. Hence, introduction of antigens in any form in body induces the production of antibodies to boost immunity.
