1. The most common use of ‘silicone hydrogels’ is making of which among the following?
[A] Surgery Equipments
[B] Contact Lenses
[C] Breast Transplants
[D] Capsules of medicines
Show Answer
Correct Answer: B [Contact Lenses]
Notes:
Silicone hydrogel and regular hydrogel lenses both are made of plastics that are hard when dry but readily absorb water and become soft and gel-like when hydrated. They are most commonly used in making Contact Lenses.
2. Normal Human blood pressure is
[A] 110/110
[B] 120/70
[C] 120/80
[D] 140/60
Show Answer
Correct Answer: C [120/80]
Notes:
Blood Pressure is expressed in two numbers. The higher number is known as Systolic Pressure, or the amount of force (as measured in millimetres of mercury) that is exerted against the artery walls during a heartbeat (contraction). The lower number in the Diastolic pressure, which does the force exist while the heart is resting between beats.
3. Which among the following plays a role in production of alcohol in beer?
[A] Bacteria
[B] Protozoan
[C] virus
[D] Yeast
Show Answer
Correct Answer: D [Yeast]
Notes:
Yeast plays a role in production of alcohol in beer. Yeast is a little, single-cell organism and is one of the simplest forms of plant life. It is responsible for the fermentation process in beer.
4. Which among the following is not a sex linked character?
[A] Color blindness
[B] Baldness
[C] Asthama
[D] None of the above
Show Answer
Correct Answer: C [Asthama]
Notes:
Asthama is not a sex linked character whereas colorblindness and baldness are sex linked. Colour blindness usually involves the inability to distinguish between shades of the colours red and green.
5. Which among the following live tissues of the Human Eye does not have blood vessels?
[A] Sclera
[B] Cornea
[C] Choroid
[D] Iris
Show Answer
Correct Answer: B [Cornea]
Notes:
Cornea does not have blood vessels. It is the transparent part of the eye that covers the front portion of the eye. It covers the pupil, iris, and anterior chamber.
6. Malaria can be caused by:
[A] all anopheles mosquitoes
[B] all culex mosquitoes
[C] only males Culex mosquitoes
[D] only female anopheles mosquitoes
Show Answer
Correct Answer: D [ only female anopheles mosquitoes]
Notes:
The Plasmodium parasite that causes malaria is neither a virus nor a bacterium – it is a single-celled parasite that multiplies in red blood cells of humans as well as in the mosquito intestine. When the female mosquito feeds on an infected person, male and female forms of the parasite are ingested from human blood.
7. Alzheimer's disease (AD) is caused due to deficiency of which of the following?
[A] Dopamine
[B] Kainic acid
[C] Acetylcholine
[D] Glutamic acid
Show Answer
Correct Answer: C [ Acetylcholine]
Notes:
Alzheimer's is caused by brain cell death. It is a neurodegenerative disease, which means there is progressive brain cell death that happens over a course of time. It is caused due to deficiency of acetylcholine.
8. With respect to the cultivation of Tea, the withering process is used to __?
[A] To stop the tea leaf oxidation at a desired level
[B] To remove excess water from leaves and allows slight oxidation
[C] To alter the flavour of the tea
[D] To stop browning of tea
Show Answer
Correct Answer: B [To remove excess water from leaves and allows slight oxidation]
Notes:
Withering is used to remove excess water from the leaves and allows a very slight amount of oxidation. The process is also important in promoting the breakdown of leaf proteins into free amino acids and increase the availability of freed caffeine, both which change the taste of the tea.
9. Which among the following blood vessels has the smallest diameter?
[A] Arterioles
[B] Capillaries
[C] Venules
[D] Lymphatic
Show Answer
Correct Answer: B [Capillaries]
Notes:
Blood is carried through the body by Blood Vessels. With the help of perfusion process capillaries supplies blood to the tissues. The diameter of capillary ranges from 5-10 micrometers. The diameter of arteriole is approximately 30 micrometer.
10. Which of the following are the postulates of Darwin’s theory of evolution?
[A] Within any population, there is natural variation.
[B] Even though all species produce a large number of offsprings, populations remain fairly constant
[C] The struggle for survival within populations eliminates the unfit individuals.
[D] All the above are correct
Show Answer
Correct Answer: D [All the above are correct]
Notes:
Darwin’s theory of evolution can be described as: within any population, there is natural variation. Some individuals have more favourable variations than others. Even though all species produce a large number of offsprings, populations remain fairly constant naturally. The struggle for survival within populations eliminates the unfit individuals. This is called natural selection.
