31. Double Vagina is found in which of the following?
[A] Monotremata
[B] Eutheria
[C] Marsupials
[D] All of the above
Show Answer
Correct Answer: C [Marsupials]
Notes:
Double Vagina is found in Marsupials (a type of kangaroo). They have different reproductive organs as compared to other organisms.
32. Which of the following makes bones so strong?
[A] Silica
[B] Cartilage
[C] Blood and marrow
[D] Calcium and phosphorous
Show Answer
Correct Answer: D [Calcium and phosphorous]
Notes:
Calcium and phosphorus are the minerals that give bones their strength.
33. What is the diameter of thick filaments?
[A] 10nm
[B] 16mm
[C] 12nm
[D] 16nm
Show Answer
Correct Answer: B [16mm]
Notes:
The diameter of thick is 16mm. The thick filament is made up of a biphasic, elongated protein called myosin.
34. Approximately how many liters of blood does the heart pump throughout the body in a day?
[A] 9.7 litres
[B] 7.7 litres
[C] 5.7 litres
[D] 3.7 litres
Show Answer
Correct Answer: C [5.7 litres]
Notes:
The heart pumps about 5.7 liters of blood throughout the body in a day.
35. Which statement is true about Passive Immunity?
[A] This immunity causes reactions
[B] This immunity develops immediately
[C] This immunity lasts only for a few weeks or months
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Passive immunity is conferred when a person is given antibodies to a disease rather than produced through their own immune system. A newborn baby receives passive immunity from its mother through the placenta.
36. Chemical digestion of food occurs by biological catalysts __
[A] enzymes
[B] villi
[C] glycogen
[D] egestion
Show Answer
Correct Answer: A [enzymes]
Notes:
The chemical digestion of food that occurs by biological catalysts is called enzymes.
37. Which of the following is NOT a function of restriction enzymes?
[A] Cleaving DNA at specific sites
[B] Generating fragmentation patterns of DNA
[C] Creating recombinant DNA
[D] Synthesizing new DNA strands
Show Answer
Correct Answer: D [Synthesizing new DNA strands]
Notes:
Restriction enzymes, also known as restriction endonucleases, are proteins that act like molecular scissors, capable of cutting DNA molecules at specific locations. They are used for generating fragmentation patterns of DNA and creating recombinant DNA. However, the actual synthesis of new DNA strands is not a function of restriction enzymes, but is performed by enzymes called polymerases.
38. Bt toxin is produced by a bacterium called __.
[A] Bacillus thuringiensis
[B] Bacillus anthracis
[C] Bacillus thermophilus
[D] Bacillus subtilis
Show Answer
Correct Answer: A [Bacillus thuringiensis]
Notes:
Bt toxin is produced by a bacterium called Bacillus thuringiensis.
39. Production of alcohol from organic compounds by microorganisms is known as ____:
[A] Anaerobic respiration
[B] Aerobic respiration
[C] Combustion
[D] Fermentation
Show Answer
Correct Answer: D [Fermentation]
Notes:
The process of breaking down large molecules into simpler one in the presence of enzyme is called fermentation. Alcoholic fermentation is a complex biochemical process during which yeasts convert sugars to ethanol, carbon dioxide, and other metabolic byproducts that contribute to the chemical composition and sensorial properties of the fermented foodstuffs.
40. Animal protein is called first class protein because it is _____:
[A] Rich in essential amino acids
[B] d
Delicious in taste
[C] Cheaper in the market
[D] Easily digestible
Show Answer
Correct Answer: A [Rich in essential amino acids]
Notes:
Proteins from animals are called ‘first class’ proteins – they provide all the essential amino acids, including those that the body can’t make. Proteins from plants are ‘second class’ proteins.
