Biology MCQs
31. Which of the following is not a function of the nose?
[A] Helps in Inhalation
[B] Organ of Smell
[C] Purification of Inhaled Air
[D] responsible for the balance
[B] Organ of Smell
[C] Purification of Inhaled Air
[D] responsible for the balance
Correct Answer: D [responsible for the balance]
Notes:
The important functions of nose are: Helps in Inhalation, Purification of Inhaled Air, Organ of Smell, and Sense of Taste.
The important functions of nose are: Helps in Inhalation, Purification of Inhaled Air, Organ of Smell, and Sense of Taste.
32. 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
[B] carrying deoxygenated blood away from the heart
[C] oxygenated blood is supplied to the heart
[D] None of the above
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.
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.
33. Serum differs from blood because it lacks__
[A] antibodies
[B] clotting factors
[C] albumins
[D] globulins
[B] clotting factors
[C] albumins
[D] globulins
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.
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.
34. What is Campylobacter abortion in animals?
[A] Abortions after 4-8 months of pregnancy
[B] incubation period is generally 1-2 weeks
[C] abortion in late pregnancy
[D] All of the above
[B] incubation period is generally 1-2 weeks
[C] abortion in late pregnancy
[D] All of the above
Correct Answer: C [abortion in late pregnancy]
Notes:
Ovine campylobacteriosis is an infectious disease that causes miscarriage in late pregnancy. It is caused by the bacteria Campylobacter fetus.
Ovine campylobacteriosis is an infectious disease that causes miscarriage in late pregnancy. It is caused by the bacteria Campylobacter fetus.
35. Green Revolution related to which of the following?
[A] Milk
[B] Agriculture
[C] Water
[D] Animals
[B] Agriculture
[C] Water
[D] Animals
Correct Answer: B [Agriculture]
Notes:
Green Revolution related to Agriculture. It took place between 1950-1960 and focused mainly on increasing agricultural production and started in Mexico.
Green Revolution related to Agriculture. It took place between 1950-1960 and focused mainly on increasing agricultural production and started in Mexico.
36. What does Insulin do?
[A] Increases blood sugar
[B] Decreases blood sugar
[C] Constricts blood vessels
[D] Stimulates lactation
[B] Decreases blood sugar
[C] Constricts blood vessels
[D] Stimulates lactation
Correct Answer: B [Decreases blood sugar]
Notes:
Insulin is central to regulating carbohydrate and fat metabolism in the body. It stops the use of fat as an energy source by inhibiting the release of glucagon. It removes excess glucose from the blood, which otherwise would be toxic. Insulin helps blood sugar enter the body’s cells so it can be used for energy. Insulin also signals the liver to store blood sugar for later use. Blood sugar enters cells, and levels in the bloodstream decrease, signaling insulin to decrease too.
Insulin is central to regulating carbohydrate and fat metabolism in the body. It stops the use of fat as an energy source by inhibiting the release of glucagon. It removes excess glucose from the blood, which otherwise would be toxic. Insulin helps blood sugar enter the body’s cells so it can be used for energy. Insulin also signals the liver to store blood sugar for later use. Blood sugar enters cells, and levels in the bloodstream decrease, signaling insulin to decrease too.
37. What combination of paternal chromosome results in a female?
[A] ZX
[B] XY
[C] XX
[D] YZ
[B] XY
[C] XX
[D] YZ
Correct Answer: C [XX]
Notes:
Among the many things parents hand down to their children are 23 pairs of chromosomes-those thread-like structures in the nucleus of every cell containing the genetic instructions for every person. One of those pairs are the chromosomes that determine the biological sex of a child – girls have an XX pair and boys have an XY pair. Females always pass an X chromosome onto their offspring. If the father passes on an X chromosome, the baby will be genetically female, and if the father passes on a Y chromosome, the baby will be genetically male.
Among the many things parents hand down to their children are 23 pairs of chromosomes-those thread-like structures in the nucleus of every cell containing the genetic instructions for every person. One of those pairs are the chromosomes that determine the biological sex of a child – girls have an XX pair and boys have an XY pair. Females always pass an X chromosome onto their offspring. If the father passes on an X chromosome, the baby will be genetically female, and if the father passes on a Y chromosome, the baby will be genetically male.
38. What causes the mottling of the dental enamel?
[A] High levels of chlorine in water
[B] High levels of nitrate in the water
[C] High levels of fluorides in the water
[D] High levels of calcium in the water
[B] High levels of nitrate in the water
[C] High levels of fluorides in the water
[D] High levels of calcium in the water
Correct Answer: C [High levels of fluorides in the water]
Notes:
The mottling of dental enamel is an extremely common disorder, characterized by hypomineralization of tooth enamel caused by ingestion of excessive fluoride during enamel formation. It is also known as dental fluorosis. Common causes of fluorosis include: fluoridated drinking water (particularly during infancy), ingestion of fluoride toothpaste, use of fluoride tablets, and consumption of processed foods made with fluoridated water.
The mottling of dental enamel is an extremely common disorder, characterized by hypomineralization of tooth enamel caused by ingestion of excessive fluoride during enamel formation. It is also known as dental fluorosis. Common causes of fluorosis include: fluoridated drinking water (particularly during infancy), ingestion of fluoride toothpaste, use of fluoride tablets, and consumption of processed foods made with fluoridated water.
39. There is no vaccine for which of the following hepatitis viruses?
[A] Hepatitis A
[B] Hepatitis B
[C] Hepatitis C
[D] Hepatitis D
[B] Hepatitis B
[C] Hepatitis C
[D] Hepatitis D
Correct Answer: C [Hepatitis C]
Notes:
Hepatitis A vaccine (Havrix, Vaqta) is used to prevent hepatitis A, a type of liver disease that is caused by the hepatitis A virus. Hepatitis B vaccines (Recombivax HB, Engerix-B) are used to prevent hepatitis B infection, a serious liver infection caused by the hepatitis B virus (HBV). Hepatitis B is easily spread through contact with blood or other fluids of an infected person. Hepatitis D is a liver disease in both acute and chronic forms caused by the hepatitis D virus (HDV). A vaccine against hepatitis B is the only method to prevent HDV infection. No vaccine is currently available for Hepatitis C virus (HCV).
Hepatitis A vaccine (Havrix, Vaqta) is used to prevent hepatitis A, a type of liver disease that is caused by the hepatitis A virus. Hepatitis B vaccines (Recombivax HB, Engerix-B) are used to prevent hepatitis B infection, a serious liver infection caused by the hepatitis B virus (HBV). Hepatitis B is easily spread through contact with blood or other fluids of an infected person. Hepatitis D is a liver disease in both acute and chronic forms caused by the hepatitis D virus (HDV). A vaccine against hepatitis B is the only method to prevent HDV infection. No vaccine is currently available for Hepatitis C virus (HCV).
40. Myrmecology is study of ____:
[A] Ants
[B] Insects
[C] Arthropods
[D] Crustaceans
[B] Insects
[C] Arthropods
[D] Crustaceans
Correct Answer: A [Ants]
Notes:
Myrmecology is the scientific study of ants, a branch of entomology. The word myrmecology was coined by William Morton Wheeler (1865–1937), although human interest in the life of ants goes back further, with numerous ancient folk references.
Myrmecology is the scientific study of ants, a branch of entomology. The word myrmecology was coined by William Morton Wheeler (1865–1937), although human interest in the life of ants goes back further, with numerous ancient folk references.
