1. MON 863 is a genetically engineered variety of which among the following?
[A] Soya Bean
[B] Maize
[C] Rice
[D] Tomato
Show Answer
Correct Answer: B [Maize]
Notes:
MON 863 is a genetically engineered variety of maize produced by Monsanto. It was generated by transformation of Zea mays cell culture line AT824 with a MIuI restriction fragment from plasmid PV-ZMIR13 using particle acceleration technology.
2. Which type of acid is predominantly found in fruits like Grapes, Bananas, and Tamarind?
[A] Lactic Acid
[B] Oxalic Acid
[C] Salicylic Acid
[D] Tartaric Acid
Show Answer
Correct Answer: D [Tartaric Acid]
Notes:
Tartaric acid is a white, crystalline organic acid that occurs naturally in many fruits, most notably in grapes, bananas, and tamarind. Tartaric acid is used in several food products for its sour taste and antioxidant properties. It has a very sour taste and is a key raw material for making wine, where it plays a vital role in maintaining the color, taste, and texture of the product.
3. “Karnal bunt” is a disease found in which if the following cereals?
[A] Rice
[B] Wheat
[C] Maize
[D] Pulses
Show Answer
Correct Answer: B [Wheat]
Notes:
Karnal bunt is a fungal disease of wheat, durum wheat, and triticale. T. indica is the fungal pathogen causing Karnal bunt of wheat seeds. Its distribution is mainly limited to northwest India and adjoining countries.
4. What would happen if red blood cells were placed in distilled water?
[A] They would shrink and collapse
[B] They would stick together
[C] They would increase in volume and burst
[D] They would remain the same
Show Answer
Correct Answer: C [They would increase in volume and burst]
Notes:
When red blood cells are placed in distilled water, the water molecules move into the cells by osmosis because the cells have a higher solute concentration than the distilled water. This influx of water causes the red blood cells to swell and eventually burst in a process known as hemolysis. This demonstrates how osmosis, a vital biological process, can result in cell damage when the external conditions are not balanced.
5. The Bovine spongiform encephalopathy (BSE) is commonly known as _______?
[A] Foot & Mouth Disease
[B] Mad Cow Disease
[C] Fog fever
[D] Creutzfeldt-Jakob disease
Show Answer
Correct Answer: B [Mad Cow Disease]
Notes:
The Bovine spongiform encephalopathy (BSE) is commonly known as Mad Cow Disease. It is a brain disorder in an adult cattle that may be spread to humans through diseased meat.
6. The relationship between algae and fungi is an example of _?
[A] Symbiotic
[B] Parasitism
[C] Mutualism
[D] Commensalism
Show Answer
Correct Answer: A [ Symbiotic ]
Notes:
First option is the correct answer
Symbiotic relationships are a special type of interaction between species. Sometimes beneficial, sometimes harmful, these relationships are essential to many organisms and ecosystems. Mutualism is when both organisms involved are benefitted.
7. Which among the following usually regulates breathing in Humans?
[A] The number of red blood cells
[B] The amount of haemoglobin in the blood
[C] Inherent genetic control
[D] CO2 levels and pH sensors
Show Answer
Correct Answer: D [ CO2 levels and pH sensors]
Notes:
The breathing rate is controlled by the medulla in the brain, which is primarily sensitive to CO2 levels in the blood.
8. In context with diabetes, many often we hear about Type1 and Type2 diabetes. What exactly are these?
[A] Body does not produce Insulin in Type1, does not respond properly in Type 2
[B] Body does not respond to Insulin properly in Type 1 , does not produce in Type 2
[C] Body produces too little Insulin in Type 1 , produces too much insulin in Type 2
[D] Body produces too much insulin in Type 1, produces too little insulin in Type 1
Show Answer
Correct Answer: A [Body does not produce Insulin in Type1, does not respond properly in Type 2]
Notes:
Diabetes mellitus occurs when the body does not produce insulin (type I) or when the body does not respond properly to insulin (type II). This results in elevated blood glucose. In either type, overtreatment, or failure to eat properly while on treatment, can lead to hypoglycemia. Most diabetics recognize their symptoms when “low” and know to go eat something before it progresses to a dangerous point. Symptoms of high blood sugar are much different – thirst, increased urination, sleepiness.
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 diseases is hereditary? (UPSC Prelims 1987)
[A] Haemophilia
[B] Tuberculosis
[C] Cancer
[D] Dysentery
Show Answer
Correct Answer: A [Haemophilia]
Notes:
Haemophilia is a mostly inherited genetic disorder that impairs the body’s ability to make blood clots, a process needed to stop bleeding. This results in people bleeding longer after an injury, easy bruising, and an increased risk of bleeding inside joints or the brain.
