31. Which pigment is responsible for skin color?
[A] keratin
[B] melanin
[C] carotene
[D] None of these
Show Answer
Correct Answer: B [melanin]
Notes:
Skin color is derived from a pigment called melanin, which is synthesized in the epidermis. Skin color can range from very pale to very dark.
32. The only connective tissue without fibroblasts is __
[A] areolar connective tissue
[B] bone
[C] cartilage
[D] blood
Show Answer
Correct Answer: D [blood]
Notes:
The only connective tissue without fibroblasts is blood. Fibroblast is the principal active cell of connective tissue.
33. What is the classification of epithelial tissue based on?
[A] function
[B] type of matrix
[C] structural modification
[D] nonvoluntary or voluntary action
Show Answer
Correct Answer: C [structural modification]
Notes:
The classification of epithelial tissue based on the structural modification. The main functions of epithelial tissue are protection, secretion, absorption, and sensation.
34. Which structure is part of the tectum?
[A] superior colliculus
[B] periaqueductal grey
[C] substantia nigra
[D] red nucleus
Show Answer
Correct Answer: A [superior colliculus]
Notes:
The superior colliculus structure is part of the tectum. The tectum forms the back of the midbrain and is formed by two paired rounded swellings, the superior and inferior colliculi.
35. Serum differs from blood because it lacks__
[A] antibodies
[B] clotting factors
[C] albumins
[D] globulins
Show Answer
Correct Answer: B [clotting factors]
Notes:
Serum differs from blood because it lacks clotting factors. The serum is the liquid and solute component of the blood that does not play any role in clotting. This is blood plasma without fibrinogen.
36. What are the symptoms of suffering from kidney disease?
[A] High blood pressure
[B] Respiration problem
[C] Swelling on the face, legs, etc.
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
There are no signs and symptoms of kidney disease in its early stages. Gradually if a person is suffering from this disease then he will have to face problems like high blood pressure, swelling in feet and face, shortness of breath, heart disease, diabetes, back pain, etc.
37. Which of the following is the correct order of travel of sperm through the female reproductive tract before it reaches the egg?
[A] Vagina > Fallopian tube > Uterus > Cervix
[B] Vagina > Cervix > Uterus > Oviduct
[C] Vagina > Uterus > Cervix > Oviduct
[D] Vagina > Fallopian tube > Cervix > Uterus
Show Answer
Correct Answer: B [Vagina > Cervix > Uterus > Oviduct]
Notes:
Vagina > Cervix > Uterus > Oviduct is the correct order of travel of sperm through the female reproductive tract before it reaches the egg.
38. Blue-Green algae are __
[A] Symbiotic Nitrogen-Fixing Cyanobacteria
[B] Free-Living Nitrogen-Fixing Bacteria
[C] Loose Association of Nitrogen-Fixing Bacteria
[D] Symbiotic Nitrogen-Fixing Bacteria
Show Answer
Correct Answer: A [Symbiotic Nitrogen-Fixing Cyanobacteria]
Notes:
Blue-Green algae are Symbiotic Nitrogen-Fixing Cyanobacteria. Liverworts, cycad roots, fern, and lichens are also some of the Nitrogen-fixing cyanobacteria.
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 of the following blood group is a universal recipient?
[A] A
[B] B
[C] O
[D] AB
Show Answer
Correct Answer: D [AB]
Notes:
Blood group AB individuals have both A and B antigens on the surface of their RBCs, and their blood plasma does not contain any antibodies against either A or B antigen. Therefore, an individual with type AB blood can receive blood from any group (with AB being preferable), but cannot donate blood to either A or B group. They are known as universal recipients.
