1. 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.
2. Skin works as a respiratory organ in which of the following Animals ?
[A] Cockroach
[B] Frog
[C] Whale
[D] Dog Fish
Show Answer
Correct Answer: B [Frog]
Notes:
Skin works as a respiratory organ in frog. The frog has three respiratory surfaces on its body which it uses to exchange gas with its surroundings: the skin, in the lungs and on the lining of the mouth.
3. 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.
4. Which among the following bacterial cells are found in cubical packets?
[A] Tetracocci
[B] Streptococci
[C] Staphylococci
[D] Sarcinae
Show Answer
Correct Answer: D [Sarcinae]
Notes:
Sarcina is a genus of Gram-positive cocci bacteria in the family Clostridiaceae. They are gram positive bacteria which are found in water and soil and thrive in low pH environment. They are arranged in cubical pockets.
5. Turmeric belongs to from which one of the following family of plants?
[A] Radish
[B] Ginger
[C] Onion
[D] Clove
Show Answer
Correct Answer: B [Ginger]
Notes:
Turmeric is a product of Curcuma longa, a rhizomatous herbaceous perennial plant belonging to the ginger family Zingiberaceae. They are native to tropical South Asia. There are 133 species of Curcuma all around the world.
6. Which among the following is not a ‘heriditary’ disease?
[A] Thalessemia
[B] Colour-Blindness
[C] Haemophilia
[D] Leukemia
Show Answer
Correct Answer: D [Leukemia]
Notes:
The human body needs red blood cells and platelets to remain healthy. But in Leukemia increased white blood cells crowd out the red blood cells and platelets. Leukemia is a blood cancer caused by a rise in the number of white blood cells in your body.
7. Saffron’ is obtained from which among the following parts of the plant?
[A] Stigma
[B] Anther
[C] Stamen
[D] Pollen
Show Answer
Correct Answer: A [Stigma]
Notes:
Saffron is a spice derived from the flower of Crocus sativus, commonly known as the “saffron crocus”. It is mainly grown in cold regions. Saffron’ is obtained from the stigma of the plant.
8. Auxiliary bud develops into which of the following parts of the plant?
[A] Fruit
[B] Leaf
[C] Roots
[D] Branch
Show Answer
Correct Answer: D [Branch]
Notes:
The axillary bud is a bud that develops in the axil of a leaf of a plant (synonymous with lateral bud). Axillary buds develop from the nodes which then becomes a new stem.
9. Which part of the plant gives us saffron?
[A] Petals
[B] Stigma
[C] Roots
[D] Stem
Show Answer
Correct Answer: B [Stigma]
Notes:
The dried stigmas (thread-like parts of the flower) are used to make saffron spice. It can take 75,000 saffron blossoms to produce a single pound of saffron spice. Saffron is largely cultivated and harvested by hand.
10. Which among the following is the characteristic feature of virus? (UPSC Prelims 1989)
[A] It is made of fats
[B] It multiplies only on dead animals
[C] It multiplies only on hosts
[D] It lacks chlorophyll
Show Answer
Correct Answer: C [It multiplies only on hosts]
Notes:
They are unique because they are only alive and able to multiply inside the cells of other living things. The cell they multiply in is called the host cell. A virus is made up of a core of genetic material, either DNA or RNA, surrounded by a protective coat called a capsid which is made up of protein.
