31. The sternum is a very important bone that protects the __
[A] Brain
[B] Heart
[C] Lungs
[D] Liver
Show Answer
Correct Answer: B [Heart]
Notes:
The sternum is a very important bone that protects the Heart. It also serves as the connection point for the coastal cartilage.
32. What kind of muscle is the myocardium made of?
[A] Epithelial Cells
[B] Cardiac muscle cells
[C] Nerve Cells
[D] None of these
Show Answer
Correct Answer: B [Cardiac muscle cells]
Notes:
The myocardium is the muscular layer of the heart. It consists of cardiac muscle cells arranged in an overlapping spiral pattern.
33. What contagious skin condition leaves small circular patches of bare skin?
[A] Ringworm
[B] Thrush
[C] Round worm
[D] Psoriasis
Show Answer
Correct Answer: A [Ringworm]
Notes:
Ringworm of the body is a fungal infection that can cause an itchy, circular rash.
34. What is Southern blotting?
[A] Attachment of probes to DNA fragments
[B] Transfer of DNA fragments from electrophoretic gel to a nitrocellulose sheet
[C] Comparison of DNA fragments to two sources
[D] Transfer of DNA fragments to electrophoretic gel from cellulose membrane
Show Answer
Correct Answer: B [Transfer of DNA fragments from electrophoretic gel to a nitrocellulose sheet]
Notes:
Southern blotting is the transfer of DNA fragments from electrophoretic gel to a nitrocellulose sheet.
35. Which of the following is the method of cellular defense in animals and plants?
[A] Recombinant DNA technology
[B] RNA interference
[C] Immune response
[D] Mutation
Show Answer
Correct Answer: B [RNA interference]
Notes:
RNA interference is the method of cellular defense in animals and plants.
36. Root cap is derived from
____:
[A] Dermatogen
[B] Calyptrogen
[C] Protoderm
[D] Histogen
Show Answer
Correct Answer: B [Calyptrogen]
Notes:
Calyptrogen is a layer of rapidly dividing cells at the tip of a plant root, from which the root cap is formed. It occurs in grasses and many other plants. The root cap is formed by several layers of cells that envelop the root tip externally. This covering of cells, of which the outermost ones are dead, envelops and protects the growing tip of root.
37. Oxygenated blood is carried by _____:
[A] Hepatic portal vein
[B] Renal vein
[C] Pulmonary artery
[D] Pulmonary vein
Show Answer
Correct Answer: D [Pulmonary vein]
Notes:
The pulmonary veins drain oxygenated blood from the lungs to the left atrium. A small amount of blood is also drained from the lungs by the bronchial veins. There are typically four pulmonary veins, two draining each lung. The pulmonary veins are part of the pulmonary circulation.
38. Hepatitis is a ____:
[A] Lung disease
[B] Liver disease
[C] Kidney disease
[D] Heart disease
Show Answer
Correct Answer: B [Liver disease]
Notes:
Hepatitis is a medical condition defined by the inflammation of the liver and characterized by the presence of inflammatory cells in the tissue of the organ. The condition can be self-limiting (healing on its own) or can progress to fibrosis (scarring) and cirrhosis.
39. Barr body is found in ____:
[A] Female somatic cells
[B] Male somatic cells
[C] Sertoli cells
[D] Sperm
Show Answer
Correct Answer: A [Female somatic cells]
Notes:
A Barr body is the inactive X chromosome in a female somatic cell in those species in which sex is determined by the presence of the Y or W chromosome rather than the diploidy of the X or Z. A typical human female has only one Barr body per somatic cell, while a typical human male has none.
40. Which among the following is an example of dicot seed?
[A] Rice
[B] Pulses
[C] Wheat
[D] Maize
Show Answer
Correct Answer: B [Pulses]
Notes:
Pulses are example of dicots since they have two cotyledons (dicot is short for ‘dicotyledon’, and ‘di’ means two). They contain two seeds inside the seed coat. Legumes (a family of plants that includes pluses, beans, peas and lentils) are all examples of dicot seeds.
