1. Which among the following is not present in pure sugar ?
[A] Carbon
[B] Hydrogen
[C] Nitrogen
[D] Oxygen
Show Answer
Correct Answer: C [Nitrogen]
Notes:
Pure Sugar is sucrose C12H22O11.
2. Fatigue is caused because of formation and depositing of which among the following acids in Muscles?
[A] Lactic Acid
[B] Acetic acid
[C] Citric Acid
[D] Pyruvic acid
Show Answer
Correct Answer: A [Lactic Acid]
Notes:
Fatigue is caused because of formation and depositing of Lactic acid, or lactate which is a chemical by product of anaerobic respiration which is the process by which cells produce energy without oxygen around.
3. Whch among the following are called scavengers of ecosystems?
[A] Bacteria
[B] Fungi & Bacteria
[C] Algae, Fungi & Bacteria
[D] None of the above
Show Answer
Correct Answer: B [Fungi & Bacteria]
Notes:
Fungi & Bacteria are called scavengers of ecosystems. Scavengers keep the ecosystem free of the bodies of dead animals, or carrion. They break down the dead organic material and recycle it into the ecosystem as nutrients.
4. Calcium is required in plants in the formation of which of the following ?
[A] Cell Membrane
[B] Cell wall
[C] Cholorophyll
[D] None of the above
Show Answer
Correct Answer: B [Cell wall]
Notes:
Calcium is required in plants in the formation of cell wall. It is a structural layer surrounding some types of cells, just outside the cell membrane. The cell wall can be tough, flexible, and sometimes rigid also.
5. Which among the following is the right location of foramen magnum ?
[A] In the Pectoral girdle
[B] Interior region of skull
[C] Posterior region of skull
[D] None of the above
Show Answer
Correct Answer: C [Posterior region of skull]
Notes:
Posterior region of skull is the right location of foramen magnum. The foramen magnum refers to a large oval opening (foramen) in the occipital bone of the skull in humans and as well as many other animals.
6. What would be the percentage of Glucose in the Urine of a healthy person?
[A] less than 1%
[B] More than 1%
[C] More than 0.1%
[D] 0%
Show Answer
Correct Answer: D [0%]
Notes:
The percentage of Glucose in the Urine of a healthy person is zero. A higher measurement could be a sign of a health problem. Diabetes is the most common cause of elevated glucose levels in humans.
7. With reference to cellular organization, consider the following:
- Fungi
- Bacteria
- Algae
- Protozoa
Which of the above possess eukaryotic cells?
[A] Only 3 and 4
[B] Only 1 and 2
[C] 1, 2, 3 and 4
[D] Only 1, 3 and 4
Show Answer
Correct Answer: D [Only 1, 3 and 4]
Notes:
Eukaryotic cells feature a true nucleus and membrane-bound organelles. Fungi, algae, and protozoa are all eukaryotic organisms. In contrast, bacteria are prokaryotic, lacking a true nucleus and such organelles. Therefore, only Fungi, Algae, and Protozoa (1, 3 and 4) possess eukaryotic cells, while bacteria do not.
8. Why does the peepal tree continuously produce oxygen?
[A] C3 Photosynthesis
[B] C4 Photosynthesis
[C] Crassulacean Acid Metabolism
[D] Carbon Cycle Rebalancing
Show Answer
Correct Answer: C [Crassulacean Acid Metabolism]
Notes:
Peepal tree has the capability to absorb CO² at night due to Crassulacean Acid Metabolism (CAM). It’s a photosynthesis pathway primarily found in desert plants and epiphytes (those that live on larger trees). During the day, CAM plants break down the malate created at night and use the released CO² to create sugars, similar to C3 plants. But, CAM, being energy inefficient, is used only under certain conditions. It seems that peepal trees use CAM when they are epiphytic and switch to C3 photosynthesis when they settle in the soil.
9. To which organ of the body is the disease ‘Glaucoma’ related to?
[A] Ear
[B] Heart
[C] Bones
[D] Eye
Show Answer
Correct Answer: D [Eye]
Notes:
Glaucoma is an eye disease that is often associated with elevated intraocular pressure, in which damage to the eye (optic) nerve can lead to loss of vision and even blindness.
10. Which of the following scientists discovered Bacteriophage?
[A] Frederick W. Twort
[B] Gottlieb Daimler
[C] John Dalton
[D] James Dwight Dana
Show Answer
Correct Answer: A [Frederick W. Twort]
Notes:
Bacteriophage, also called phage or bacterial virus, any of a group of viruses that infect bacteria. Bacteriophages were discovered independently by Frederick W. Twort in Great Britain in 1915. It is a virus which parasitizes a bacterium by infecting it and reproducing inside it. Bacteriophages are much used in genetic research.
