31. Which systems protect our body against disease-causing microbes?
[A] Immune system
[B] Digestive system
[C] Excretory system
[D] Respiratory system
Show Answer
Correct Answer: A [Immune system]
Notes:
The immune system protects our body against disease-causing microbes. The main parts of the immune system are white blood cells, antibodies, complement system, lymphatic system, spleen, thymus, and bone marrow.
32. Which of the following immunity is present from our birth?
[A] Passive immunity
[B] Active immunity
[C] Innate Immunity
[D] Acquired immunity
Show Answer
Correct Answer: C [Innate Immunity]
Notes:
Innate immunity is the defense system you are born with. It protects against all antigens. Innate immunity involves barriers that prevent harmful substances from entering the body.
33. Neutrophils, basophils, lymphocytes, eosinophils, and monocytes are examples of __.
[A] Physical barrier
[B] Cellular barriers
[C] Cytokine barriers
[D] Physiological barriers
Show Answer
Correct Answer: B [Cellular barriers]
Notes:
Neutrophils, basophils, lymphocytes, eosinophils, and monocytes are examples of Cellular barriers.
34. Which gland is helpful in increasing blood calcium levels?
[A] Thymus gland
[B] Thyroid gland
[C] Pineal gland
[D] Parathyroid gland
Show Answer
Correct Answer: D [Parathyroid gland]
Notes:
The parathyroid gland is helpful in increasing blood calcium levels. These glands consist of four small glands that are located behind the thyroid in the neck.
35. A process where new combinations of alleles are formed is called?
[A] Genetic Drift
[B] Mutation
[C] Genetic Recombination
[D] Natural selection
Show Answer
Correct Answer: C [Genetic Recombination]
Notes:
A process where new combinations of alleles are formed is called Genetic Recombination.
36. Leptospirosis is a disease caused by ____:
[A] Fungus
[B] Protozoa
[C] Virus
[D] Bacteria
Show Answer
Correct Answer: D [Bacteria]
Notes:
Leptospirosis is a bacterial disease caused by corkscrew-shaped bacteria called Leptospira. Signs and symptoms can range from none to mild such as headaches, muscle pains, and fevers; to severe with bleeding from the lungs or meningitis. If the infection causes the person to turn yellow, have kidney failure and bleeding, it is then known as Weil’s disease.
37. To digest protein which of the enzyme is present in pancreatic juice?
[A] Pepsin
[B] Upes
[C] Trypsin
[D] Amaylase
Show Answer
Correct Answer: C [Trypsin]
Notes:
Trypsin is an enzyme that helps us digest protein. In the small intestine, trypsin breaks down proteins, continuing the process of digestion that began in the stomach. It may also be referred to as a proteolytic enzyme, or proteinase. Trypsin is produced by the pancreas in an inactive form called trypsinogen. The trypsinogen enters the small intestine through the common bile duct and is converted to active trypsin.
38. 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.
39. Which one of the following animals is sanguinivorous?
[A] Fruit-fly
[B] Mosquito
[C] House-fly
[D] Snail
Show Answer
Correct Answer: B [Mosquito]
Notes:
The literal meaning of ‘sanguinivorous’ is someone subsisting on a diet of blood, or blood-sucking bats and animals. Mosquitoes belong to this category. Leech, female mosquitoes, vampire bats are other examples of Sanguivores.
40. 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.
