31. Bi-focal lenses are required to correct __
[A] astigmatism
[B] coma
[C] myopia
[D] presbyopia
Show Answer
Correct Answer: D [presbyopia]
Notes:
Bifocals are glasses that have both a correction for your distance vision on the top of the lens and a correction to help you read at the bottom.
32. Name the longest and heaviest bone of the body?
[A] Femur
[B] Fibula
[C] Tibia
[D] Ilium
Show Answer
Correct Answer: A [Femur]
Notes:
The thigh bone or femur is the longest and strongest bone in your body.
33. What happens when the luteinizing hormone increases?
[A] stimulates contraction of uterus
[B] ovaries to release eggs
[C] maintains milk production in breasts
[D] All of the above
Show Answer
Correct Answer: B [ovaries to release eggs]
Notes:
Ovaries release eggs when the luteinizing hormone increases.
34. In incomplete dominance__.
[A] Phenotype of both alleles is expressed
[B] Phenotype of only one allele is expressed
[C] Phenotype of neither of the alleles are expressed
[D] Phenotype of both alleles is partially expressed
Show Answer
Correct Answer: D [Phenotype of both alleles is partially expressed]
Notes:
In incomplete dominance, the phenotype of both alleles is partially expressed.
35. What is required for nitrogen fixation by Rhizobium?
[A] Potassium
[B] Phosphorus
[C] Nitrate
[D] Sodium
Show Answer
Correct Answer: B [Phosphorus]
Notes:
Phosphorus is required for nitrogen fixation by Rhizobium. This is a genus of Gram-negative soil bacteria.
36. What is Southern blotting?
[A] Attachment of probes to DNA fragments
[B] Transfer of DNA fragments from electrophoretic gel to a nitrocellulose sheet
[C] Comparison of DNA fragments to two sources
[D] Transfer of DNA fragments to electrophoretic gel from cellulose membrane
Show Answer
Correct Answer: B [Transfer of DNA fragments from electrophoretic gel to a nitrocellulose sheet]
Notes:
Southern blotting is the transfer of DNA fragments from electrophoretic gel to a nitrocellulose sheet.
37. How many approaches are there in order to clone the complete genome?
[A] 1
[B] 2
[C] 3
[D] 4
Show Answer
Correct Answer: B [2]
Notes:
There are basically two approaches to cloning the entire genome. In the first approach, systematic cloning is performed and the second approach is based on randomly cloning overlapping fragments.
38. Which of the following brings back deoxygenated blood from different parts of human body to heart?
[A] Veins
[B] Arteries
[C] Nerves
[D] Lungs
Show Answer
Correct Answer: A [Veins]
Notes:
Veins carry the deoxygenated blood from different parts of the body to the heart. There are two main veins that carry out this job. The superior vena cava carries deoxygenated blood from head, neck, thorax and hands to the right atrium of our heart. The inferior vena cava carries deoxygenated blood from legs, pelvic region and abdominal organs to the right atrium of our heart. Among the veins, only pulmonary vein carries oxygenated blood.
39. Water of coconut is ____:
[A] Liquid nucellus
[B] Liquid endocarp
[C] Degenerated liquid endosperm
[D] Liquid mesocarp
Show Answer
Correct Answer: C [Degenerated liquid endosperm]
Notes:
Coconut water, the clear liquid inside young green coconuts (fruits of the coconut palm), is liquid endosperm. In early development, it serves as a sus pension for the endosperm of the coconut during their nuclear phase of development. It contains sugars, vitamins, minerals, proteins, free amino acids and growth promoting factors.
40. Which of the following are the largest fixator of solar energy?
[A] Bacteria
[B] Protozoa
[C] Fungi
[D] Green plants
Show Answer
Correct Answer: D [Green plants]
Notes:
Plants and photosynthetic organisms utilize this solar energy in fixing large amounts of CO2 while amounts consumed by human beings are relatively small representing only 10% of the energy converted during photosynthesis. The process of photosynthesis in plants involves a series of steps and reactions that use solar energy, water, and carbon dioxide to produce organic compounds and oxygen.
