1. The name of Karl Landsteiner is associated with the discovery of which of the following ?
[A] Human Endocrine System
[B] Human Blood Groups
[C] Vitamin B Group
[D] Proteins
Show Answer
Correct Answer: B [Human Blood Groups]
Notes:
The name of Karl Landsteiner is associated with the discovery of Human Blood Groups. He was given the Nobel Prize for Physiology or Medicine in 1930 for his discovery in 1901 of, and outstanding work on, the blood groups.
2. Which of the following artificial sweeteners is not broken down by the body and therefore it is non-caloric (no-calorie sweetener)?
[A] Aspartame
[B] Saccharin
[C] Sucralose
[D] Cyclamate
Show Answer
Correct Answer: C [Sucralose]
Notes:
Sucralose is an artificial sweetener. The majority of ingested sucralose is not broken down by the body and therefore it is non-caloric. Sucralose is approximately 600 times as sweet as sucrose (table sugar), twice as sweet as saccharin, and 3 times as sweet as aspartame. It is stable under heat and over a broad range of pH conditions. Therefore, it can be used in baking or in products that require a longer shelf life. The commercial success of sucralose-based products stems from its favorable comparison to other low-calorie sweeteners in terms of taste, stability, and safety. It is used because it is a no-calorie sweetener, and does not promote dental cavities, is safe for consumption by diabetics, and does not affect insulin levels.
3. Which of the following tests is used for the diagnosis of ‘Colour-Blindness’ in people ?
[A] Ishihara Test
[B] Widal Test
[C] ELISA test
[D] Rorschach test
Show Answer
Correct Answer: A [Ishihara Test]
Notes:
Ishihara Test is used for the diagnosis of ‘Colour-Blindness’ in people. The test contains a number of colored plates, called Ishihara plates. Each of these plates contain a circle of dots appearing randomized in color and size.
4. Which of the following is responsible for exchange of carbon dioxide for oxygen in the lungs?
[A] Alveoli
[B] Pharynx
[C] Tendons
[D] Duodenum
Show Answer
Correct Answer: A [ Alveoli ]
Notes:
Alveoli are tiny sacs in our lungs. The main function of the alveoli is the exchange of carbon dioxide for oxygen in the lungs.
5. In which among the following plants, seeds germinate and seedlings grow while still attached to their mother plant?
[A] Onion
[B] Rhizophora
[C] Sheesham
[D] Cycas
Show Answer
Correct Answer: B [ Rhizophora]
Notes:
The phenomenon is found in Mangrove Plants and is known as Vivipary and Rhizophora belongs to that category.
6. Gram Positive Bacteria can be identified by the Gram staining because of the following reasons?
[A] The cell walls have more lipids compared to peptidoglycan
[B] The Cells walls have more Peptidoglycan compared to Lipids
[C] The Cells membrane has more fatty acids
[D] The plasma has Peptidoglycans
Show Answer
Correct Answer: B [ The Cells walls have more Peptidoglycan compared to Lipids]
Notes:
The cell wall which is made up of Peptidoglycan as well as lipids gets violet due to the reaction of the CV+. After the decolorization with alcohol, the lipids gets dissolved and the bacteria with higher Peptidoglycan remain violet. These are called Gram Positive bacteria.
7. Phenylketonuria is an example of an in born error of metabolism. This “error” refers to which of the following phenomenon?
[A] hormonal overproduction
[B] atrophy of endocrine glands
[C] inherited lack of an enzyme
[D] non-disjunction
Show Answer
Correct Answer: B [atrophy of endocrine glands]
Notes:
Phenylketonuria (PKU) is an inborn error of metabolism due to atrophy of endocrine glands that results in decreased metabolism of the amino acid phenylalanine. Untreated, PKU can lead to intellectual disability, seizures, behavioral problems, and mental disorders. It may also result in a musty smell and lighter skin.
8. Neem tree has acquired industrial importance as a source of?
[A] biopesticide and anti-fertility compound
[B] anti-fertility compound, biofertilizer and anti-cancer drug
[C] biofertilizer, biopesticide and anti- fertility compound
[D] anti-cancer drug, biopesticide and biofertilizer
Show Answer
Correct Answer: A [biopesticide and anti-fertility compound]
Notes:
Neem has been patented by India for its use as biofertilizer, biopesticide and antifertility compound as contraceptive. Neem is a natural herb that comes from the neem tree, other names for which include Azadirachta indica and Indian lilac. The extract comes from the seeds of the tree and has many different traditional uses. Neem is known for its pesticidal and insecticidal properties, but people also use it in hair and dental products.
9. Which among the following vitamins is absent in an egg?
[A] Vitamin D
[B] Vitamin C
[C] Vitamin A
[D] Vitamin K
Show Answer
Correct Answer: B [Vitamin C]
Notes:
Egg is devoid of vitamin C. Egg contains all the vitamins barring vitamin C.
Extra info: Egg yolk is one of the few foods which contains vitamin D.
10. The process by which ammonia is converted into nitrate is__?
[A] Nitrogen-fixation
[B] Ammonification
[C] Denitrification
[D] Nitrification
Show Answer
Correct Answer: D [Nitrification]
Notes:
The Process by which ammonia is converted into nitrate is called Nitrification. It can be done in two steps that involve Nitrite formation and Nitrate formation.
