31. The muscular diaphragm that controls the size of the pupil is __
[A] cornea
[B] ciliary muscles
[C] iris
[D] retina
Show Answer
Correct Answer: C [iris]
Notes:
The muscular diaphragm that controls the size of the pupil is the iris. The iris helps control the amount of light entering the eye by opening and closing the pupil.
32. The Axial skeleton is comprised of __ bones.
[A] 90
[B] 126
[C] 60
[D] 80
Show Answer
Correct Answer: D [80]
Notes:
The axial skeleton is made up of 80 bones in the central part of our body.
33. 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.
34. Which of the following are the causes of red water?
[A] Clostridium hemolyticum
[B] Achromobacter anitratum
[C] Escherichia coli
[D] Salmonella typhimurium
Show Answer
Correct Answer: A [Clostridium hemolyticum]
Notes:
Clostridium hemolytic are the causes of red water disease. Redwater disease in cattle is caused by a protozoan blood parasite in the erythrocytes.
35. Which of the following are bacterial diseases in Humans?
[A] Pulmonary Tuberculosis
[B] Cholera
[C] Leprosy
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Pulmonary Tuberculosis, Cholera, and Leprosy are bacterial diseases in Humans.
36. Which of the following is called Mendel’s first law of inheritance?
[A] Law of Dominance
[B] Law of Segregation
[C] Law of Independent Assortment
[D] All of the above
Show Answer
Correct Answer: A [Law of Dominance]
Notes:
The law of dominance is also called Mendel’s first law of inheritance. According to this, the hybrid offspring will only inherit the dominant trait in the phenotype.
37. In incomplete dominance__.
[A] Phenotype of both alleles is expressed
[B] Phenotype of only one allele is expressed
[C] Phenotype of neither of the alleles are expressed
[D] Phenotype of both alleles is partially expressed
Show Answer
Correct Answer: D [Phenotype of both alleles is partially expressed]
Notes:
In incomplete dominance, the phenotype of both alleles is partially expressed.
38. Carbon monoxide poisoning can be cured by
____:
[A] Drinking lemon-water
[B] Eating butter
[C] Exposing the affected person to fresh oxygen
[D] Consuming multi-vitamin tablet
Show Answer
Correct Answer: C [Exposing the affected person to fresh oxygen]
Notes:
Carbon monoxide poisoning can be cured by exposing the affected person to fresh oxygen. It is because CO posoning leads to oxygen starvation of body cells. This therapy involves breathing pure oxygen in a chamber in which the air pressure is about two to three times higher than normal. This speeds the replacement of carbon monoxide with oxygen in your blood. Hyperbaric oxygen therapy may be used in cases of severe carbon monoxide poisoning.
39. Panthera pardus is the scientific name of ____:
[A] Panther
[B] Leopard
[C] Lion
[D] Tiger
Show Answer
Correct Answer: B [Leopard]
Notes:
Panthera pardus is the scientific name of leopard, one of the five “big cats” in the genus Panthera. It is a member of the family Felidae with a wide range in sub-Saharan Africa and parts of Asia. It belongs to the Chordata phylum, Mammalia class and Carnivora order.
40. An Antigen is ____:
[A] The result of Antibody
[B] The stimulus for Antibody formation
[C] The opposite of Antibody
[D] The residue of an Antibody
Show Answer
Correct Answer: B [The stimulus for Antibody formation]
Notes:
Antigens are defined as substances recognized by the body as foreign, causing the body to produce an antibody to react specifically with it. Antibodies are proteins produced by lymphocytes as a result of stimulation by an antigen which can then interact specifically with that particular antigen.
