31. 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.
32. Which of the following immunity is called the first line of defense?
[A] Innate Immunity
[B] Active immunity
[C] Passive immunity
[D] Acquired immunity
Show Answer
Correct Answer: A [Innate Immunity]
Notes:
Innate Immunity is called the first line of defense. Innate immune cells are white blood cells that mediate innate immunity and include basophils, dendritic cells, eosinophils, Langerhans cells, mast cells, monocytes and macrophages, neutrophils, and NK cells.
33. Which of the following secretes digestive enzymes into the duodenum that break down proteins, fats, and carbohydrates?
[A] Liver
[B] Pancreas
[C] Gallbladder
[D] Small intestine
Show Answer
Correct Answer: B [Pancreas]
Notes:
The pancreas secretes digestive enzymes into the duodenum that break down proteins, fats, and carbohydrates.
34. Which of the following is the long muscular tube that connects the small intestine to the rectum?
[A] Colon
[B] Gallbladder
[C] Pancreas
[D] Esophagus
Show Answer
Correct Answer: A [Colon]
Notes:
The colon is the long muscular tube that connects the small intestine to the rectum.
35. In which part of the human body Thymus gland is located?
[A] Between both cerebrum
[B] Located above heart
[C] Behind Hypothalamus
[D] In throat
Show Answer
Correct Answer: B [Located above heart]
Notes:
The thymus gland is located above the heart, inside the chest cavity. It is important for the development of the T cell inside the body. It is largest in children and starts shrinking as you reach puberty and changes to fat.
36. Klinefelter’s syndrome is an example of which of the following disorder?
[A] Mendelian Disorder
[B] Mitochondrial Inheritance
[C] Multifactorial Genetic Inheritance
[D] Chromosomal Disorder
Show Answer
Correct Answer: D [Chromosomal Disorder]
Notes:
Klinefelter’s syndrome is an example of Chromosomal Disorder in which a genetic condition that results when a boy is born with an extra copy of the X chromosome.
37. Where are the genes for cytoplasmic male sterility in plants located?
[A] Chloroplast genome
[B] Mitochondrial genome
[C] Cytosome
[D] None of these
Show Answer
Correct Answer: B [Mitochondrial genome]
Notes:
The genes for cytoplasmic male sterility in plants are located in the Mitochondrial genome.
38. Which one of the following features is absent in a virus?
[A] Presence of cell wall
[B] Reproduce within host cell
[C] Fully parasitic in nature
[D] Presence of either DNA or RNA
Show Answer
Correct Answer: A [Presence of cell wall]
Notes:
A virus has a simple structure. It has no internal cellular structure, no cell wall or cell membrane, just the protein coat that holds the string of nucleic acid. It is made only of a nucleic acid + a protein coat. A cell wall is a layer located outside the cell membrane found in plants, fungi, bacteria, algae, and archaea.
39. Which one of the following elements is associated with teeth disorder?
[A] Chlorine
[B] Bromine
[C] Iodine
[D] Fluorine
Show Answer
Correct Answer: D [Fluorine]
Notes:
Fluorine is the element that is associated with teeth disorder because the presence of sodium fluoride in drinking water at the level of 2ppm may cause mottled enamel in teeth, skeletal fluorosis, and may be associated with cancer and other diseases. However, topically applied fluoride (toothpaste, dental rinses) has been shown to help reduce dental caries.
40. Vitamin C is also known as _____:
[A] Tartaric acid
[B] Acetic acid
[C] Ascorbic acid
[D] Malic acid
Show Answer
Correct Answer: C [Ascorbic acid]
Notes:
Vitamin C is also known as ascorbic acid (C6H8O6). It is a water-soluble vitamin that occurs as a white or slightly yellow crystal or powder with a slight acidic taste. Ascorbic acid is an essential nutrient in human diets, and necessary to maintain connective tissue and bone.
