1. 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.
2. In which of the following conditions a person is born with both ovarian and testicular tissues i.e. both female & male organs?
[A] Swyer syndrome
[B] Penile agenesis
[C] Polyorchidism
[D] Hermaphroditism
Show Answer
Correct Answer: D [Hermaphroditism]
Notes:
A hermaphrodite is an organism that has complete or partial reproductive organs and produces gametes normally associated with both male and female sexes. It has both ovarian and testicular tissues.
3. What is RuBisCO?
[A] A Sugar
[B] An Enzyme
[C] A Fat
[D] A Carbohydrate
Show Answer
Correct Answer: B [An Enzyme]
Notes:
Ribulose-1,5-bisphosphate carboxylase oxygenase first enzyme of Calvin Cycle of Carbon Fixation
4. The metals in which among the following groups are required in maximum quantities in a living organism?
[A] Potassium, Manganese, Molybdenum, Calcium
[B] Potassium, Molybdenum, Copper, Calcium
[C] Pottassium,Sodium, Magnesium, Calcium
[D] Sodium, Magnesium, Copper, Manganese
Show Answer
Correct Answer: C [Pottassium,Sodium, Magnesium, Calcium]
Notes:
Potassium, Sodium, Magnesium, Calcium are required in maximum quantities in a living organism.
5. From the point of view of evolution of living organisms, which of the following set of animals is a correct sequence of evolution?
[A] Whale, Kangaroo, Echidna
[B] Echidna, Whale, Kangaroo
[C] Kangaroo, Whale, Echidna
[D] Echidna, Kangaroo, Whale
Show Answer
Correct Answer: D [Echidna, Kangaroo, Whale]
Notes:
From the point of view of evolution of living organisms, the correct sequence of evolution in the above options is: Echidna, Kangaroo, Whale.
6. Which of the following is the lowest taxonomic division shared by both man and frog?
[A] Order
[B] Class
[C] Phylum
[D] Family
Show Answer
Correct Answer: C [Phylum]
Notes:
In the kingdom of animals, the phylum Chordata includes the classes of Pisces, Amphibia, Reptilia, Aves and Mammalia. These classes have at some stage in their lives shown common characteristics. So, man and frog belong to the same Phylum in the taxonomical level.
7. What is the number of mitochondria present in a bacterial cell?
[A] Zero
[B] One
[C] Two
[D] Four
Show Answer
Correct Answer: A [Zero]
Notes:
Bacterium contain no membrane bound nucleus and rarely contain membrane bound organelles. Simply, most don’t have any large organelles with their own membranes; this means no nucleus, no mitochondria and no chloroplast. Even if a bacteria wanted to have mitochondria , it is couldn’t.
8. In typhoid which of the following drugs is administered?
[A] Chloromycetin
[B] Penicillin
[C] Sulphonamide
[D] Tetracycline
Show Answer
Correct Answer: A [Chloromycetin]
Notes:
Chloromycetin or Chloramphenicol is the drug of choice in the treatment of this disease. It has been the antibiotic of choice for patients with typhoid fever for more than 30 years, although ampicillin and cotrimoxazole are also used.
9. Which of the following is commercially produced from Hybridoma technology?
[A] Monoclonal antibodies
[B] interferon
[C] antibodies
[D] alcohol
Show Answer
Correct Answer: A [Monoclonal antibodies]
Notes:
Hybridoma technology is used to commercially production of monoclonal antibodies. The monoclonal antibodies are protective protein produced by the clone of single immune cell.
10. Deficiency in which among the following leads to beriberi disease?
[A] Vitamin B1
[B] Vitamin B2
[C] Vitamin B3
[D] Vitamin B6
Show Answer
Correct Answer: A [Vitamin B1]
Notes:
Vitamin B1/Thiamine deficiency leads to a disease called beriberi. Over polishing of rice also leads to beriberi.
