31. In patients with hemophilia, which of these can increase the risk of cerebral microbleeds?
[A] cardiovascular risk factors
[B] increased age
[C] Hepatitis C infection
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
In patients with hemophilia, cardiovascular risk factors, age, and hepatitis C infection may increase the risk of cerebral microbleeds.
32. How are Infectious Diseases transmitted?
[A] Droplet Infection
[B] They are inherited
[C] By seeing patients
[D] Eating an unhealthy diet
Show Answer
Correct Answer: A [Droplet Infection]
Notes:
Infection can occur when a healthy person inhales droplets from the saliva, sputum, or nasal passages of an infected person.
33. The technique of __ crosses the limits of conventional hybridization processes.
[A] immunology
[B] modern hybridization
[C] genetic engineering
[D] cell biology
Show Answer
Correct Answer: C [genetic engineering]
Notes:
The technique of genetic engineering crosses the limits of conventional hybridization processes.
34. Which protein helps in DNA winding?
[A] Helicase
[B] Histone
[C] Lipase
[D] Cellulase
Show Answer
Correct Answer: B [Histone]
Notes:
A protein that provides structural support to a chromosome is called histone.
35. Biofortification is a ____:
[A] Method of plant breeding for disease resistance
[B] Method of developing resistance to insect pests
[C] Method of breeding crops to increase their nutritional value
[D] Strategy to combat unwanted nutrients in plants
Show Answer
Correct Answer: C [Method of breeding crops to increase their nutritional value]
Notes:
Biofortification is the breeding crops to increase their nutritional value. This can be done either through conventional selective breeding or genetic engineering. Biofortification differs from ordinary fortification because it focuses on making plant foods more nutritious as the plants are growing, rather than having nutrients added to the foods when they are being processed.
36. Which of the following prevents bleeding of gums?
[A] Nicotinamide
[B] Ascorbic acid
[C] Thiamine
[D] Vitamin B
Show Answer
Correct Answer: B [Ascorbic acid]
Notes:
Vitamin C (Ascorbic acid) cures scurvy, which can cause abnormal gum bleeding. Excellent sources include citrus fruits such as oranges, lemons, limes, and grapefruits. Researchers examined 15 published studies involving 1,140 healthy people as well as data on 8,210 people from the CDC’s Health and Nutrition Examination Survey. They found that low vitamin C levels in the bloodstream were associated with an increased risk for gum bleeding with gentle probing.
37. Which one of the following is not a true fish?
[A] Jellyfish
[B] Starfish
[C] Cuttlefish
[D] All of the above
Show Answer
Correct Answer: D [All of the above ]
Notes:
The term fish is most strictly used to describe any animal with a backbone that has gills throughout life and has limbs, if any, in the shape of fins. Many types of aquatic animals commonly referred to as fish are not fish in this strict sense; examples include shellfish, cuttlefish, starfish, crayfish and jellyfish.
38. 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.
39. 2, 4-D is used as ____:
[A] Weedicide
[B] Vitamin
[C] Fertilizer
[D] Insecticide
Show Answer
Correct Answer: A [Weedicide]
Notes:
2, 4-Dichlorophenoxyacetic acid is a s a wide range selective weedicide which controls broad leaf type (DICOT) weeds in paddy fields, tea plantations, sugarcane fields, fruit orchards etc. It is one of the most widely used herbicides in the world.
40. During the day which process is the major driving force in the movement of water in the xylem?
[A] Suction
[B] Evaporation
[C] Transpiration pull
[D] Translocation
Show Answer
Correct Answer: C [Transpiration pull]
Notes:
During the day when stomata are open, the transpiration pull becomes a major driving force in the movement of water in the xylem. Transpiration is the process of water movement through a plant and its evaporation from aerial parts, such as leaves, stems and flowers. Water is necessary for plants but only a small amount of water taken up by the roots is used for growth and metabolism. The remaining 97–99.5% is lost by transpiration and guttation.
