1. Which among the following diseases is characterized by “complete loss of memory”?
[A] Amnesia
[B] Schizophrenia
[C] Alzheimer’s disease
[D] Parkinson’s disease
Show Answer
Correct Answer: A [Amnesia ]
Notes:
Amnesia refers to a loss of memory due to illness, injury, drug abuse or other causes.
2. A ripe Tomato is Red, Leaves are Green, Flower is Purple, Hair is Black. Bring out the pigments responsible for these colors respectively ?
[A] Lycopene, Melanin, Chlorophyll, Anthocyanin
[B] Lycopene, Chlorophyll, Anthocyanin, Melanin
[C] Anthocyanin, Chlorophyll, Lycopene, Melanin
[D] Melanin, Anthocyanin, Chlorophyll, Lycopene
Show Answer
Correct Answer: B [Lycopene, Chlorophyll, Anthocyanin, Melanin]
Notes:
A ripe Tomato is Red, Leaves are Green, Flower is Purple, Hair is Black. The pigments responsible for these colors are Lycopene, Chlorophyll, Anthocyanin, Melanin respectively.
3. Cell membranes contain some biochemicals which are responsible for cell recognition and adhesion. They are _________ ?
[A] Proteins
[B] Lipids
[C] glycoproteins and gycolipids
[D] None of the above
Show Answer
Correct Answer: C [glycoproteins and gycolipids]
Notes:
Cell membranes contain some biochemicals which are responsible for cell recognition and adhesion. They are glycoproteins and glycolipids. Lipid and proteins on the cell membrane surface often have short carbohydrate chains protruding out from the cell surface which are known as glycolipids and glycoproteins.
4. The Chlorophyll cells within the plant leaves are perfectly optimized to absorb which of the following waves of the Sun Light?
[A] Green
[B] Red & Blue
[C] Red & Yellow
[D] Yellow and Blue
Show Answer
Correct Answer: B [Red & Blue]
Notes:
The Chlorophyll cells within the plant leaves are perfectly optimized to absorb red and blue waves of the Sun Light. Chlorophyll is concentrated within organisms in structures called chloroplasts.
5. Which among the following was the first vaccine ever to be developed?
[A] Cholera
[B] Smallpox
[C] Rabies
[D] Tetanus
Show Answer
Correct Answer: B [Smallpox]
Notes:
Smallpox vaccine was the first vaccine ever to be developed. Smallpox is an infectious disease which is caused by one of two virus variants, Variola major and Variola minor.
6. Pearls are primarily composed of which of the following substances?
[A] Protein
[B] Calcium Carbonate
[C] Silica
[D] Sodium Carbonate
Show Answer
Correct Answer: B [Calcium Carbonate]
Notes:
Pearls are composed primarily of calcium carbonate, which is what gives them their unique luster. They are formed within the shell of certain mollusks as a defense mechanism against a potentially threatening irritant, such as a parasite. Over time, the mollusk continually deposits layers of calcium carbonate, which eventually forms a smooth, hard pearl. This process can take up to eight years.
7. Strontium-90, as a source of health issues after a nuclear disaster is most dangerous for which among the following organs of Human Body?
[A] Liver
[B] Blood
[C] Skin
[D] Bones
Show Answer
Correct Answer: D [ Bones]
Notes:
Strontium-90 is a “bone seeker” that exhibits biochemical behaviour similar to calcium, the next lighter Group 2 element. After entering the organism, most often by ingestion with contaminated food or water, about 70–80% of the dose gets excreted. Virtually all remaining strontium-90 is deposited in bones and bone marrow, with the remaining 1% remaining in blood and soft tissues. Its presence in bones can cause bone cancer, cancer of nearby tissues, and leukaemia. (wikipedia)
8. What do we call the non-green heterotrophic plants of plant kingdom?
[A] Bacteria
[B] Fungi
[C] Archaea
[D] Escherichia coli
Show Answer
Correct Answer: B [Fungi]
Notes:
Fungi are called the non-green heterotrophic plants of plant kingdom. This Kingdom includes smuts, rusts, yeasts, molds, mushrooms, etc. It is an eukaryotic organism.
9. Which of the following is the reason behind bleeding through nose in high mountain regions? (UPSC Prelims 1979).
[A] The pressure of the blood capillaries is higher than the outside pressure
[B] The pressure at high altitudes is greater than that in the plains
[C] The blood pressure increases at high altitudes
[D] The blood pressure decreases at high altitudes
Show Answer
Correct Answer: A [The pressure of the blood capillaries is higher than the outside pressure]
Notes:
As altitude increases, the availability of oxygen decreases, making the air thinner and drier. Dry climates can cause drying and cracking inside the nose, which can lead to a nosebleed. The climate inside nose gets drier. This makes the blood vessels exposed inside your nose more likely to burst there than at lower altitudes.
10. Which of the following is the name given to the Inspection and dissection of a body after death in human beings as for determination of cause of death? (UPSC Prelims 1988)
[A] Autopsy
[B] Autotomy
[C] Autoesism
[D] Autograft
Show Answer
Correct Answer: A [Autopsy]
Notes:
An autopsy is a surgical procedure that consists of a thorough examination of a corpse by dissection to determine the cause, mode and manner of death or to evaluate any disease or injury that may be present for research or educational purposes.
