31. Which of the following is protein hormone?
[A] Oxytocin
[B] Insulin
[C] TSH
[D] Antidiuretic hormone
Show Answer
Correct Answer: B [Insulin]
Notes:
Insulin and human growth hormone are protein hormones while oxytocin and antidiuretic hormones are peptide hormones. TSH or Thyroid Stimulating Hormone consists of carbohydrates attached to protein hence it comes under glycoprotein hormone.
32. Chickenpox is a highly contagious disease caused by the __
[A] Pasteurella pestis
[B] Bacillus anthracis
[C] Bordetella pertussis
[D] Varicella zoster
Show Answer
Correct Answer: D [Varicella zoster ]
Notes:
Chickenpox is a highly contagious disease caused by the varicella zoster virus.
33. Green Revolution related to which of the following?
[A] Milk
[B] Agriculture
[C] Water
[D] Animals
Show Answer
Correct Answer: B [Agriculture]
Notes:
Green Revolution related to Agriculture. It took place between 1950-1960 and focused mainly on increasing agricultural production and started in Mexico.
34. Identification of drugs through genomic studies is called?
[A] Genomics
[B] Pharmacogenomics
[C] Pharmacogenetics
[D] Cheminformatics
Show Answer
Correct Answer: B [Pharmacogenomics]
Notes:
Identification of drugs through genomic studies is called Pharmacogenomics. Pharmacogenomics may improve health care costs and efficiency.
35. _____ is the study of the microanatomy of cells, tissues and organs as seen through a microscope:
[A] Entomology
[B] Paleontology
[C] Histology
[D] Lchthyology
Show Answer
Correct Answer: C [Histology]
Notes:
Histology is the study of the micro anatomy of cells, tissues, and organs as seen through a microscope. It examines the correlation between structure and fun-ction.Histology is the micro-scopic counterpart to gross anatomy which looks at larger structures visible without a microscope.
36. What accumulates in the muscles after continuous strenuous physical exercise as a result of temporary anaerobic respiration that causes muscular fatigue?
[A] ATP
[B] Lactic acid
[C] Ethyl alcohol
[D] Carbon dioxide
Show Answer
Correct Answer: B [Lactic acid]
Notes:
Anaerobic reactions involve break down of glucose into pyruvic acid, which then reacts to produce lactic acid. As muscle metabolism shifts from aerobic to anaerobic ATP production, lactic acid begins to accumulate in muscles and to appear in the bloodstream. This leads to muscle fatigue with changing pH of muscle cells. C6H12O6 —> 2C3H6O3 + 2ATP
37. The optimum dissolved oxygen level (in mg/litre) required for survival of aquatic organisms is ____:
[A] 2 – 4
[B] 4 – 6
[C] 8 – 10
[D] 12 – 16
Show Answer
Correct Answer: B [4 – 6]
Notes:
Oxygen is one of several dissolved gases important to aquatic systems. Dissolved oxygen is necessary to maintain aerobic conditions in surface waters and is considered a primary indicator when assessing the suitability of surface waters to support aquatic life. Dissolved oxygen can be measured in two ways: either in milligrams per litre (mg/L) or percent saturation (% sat). Water with an oxygen concentration of less than 3 mg/L will generally not support fish. When concentrations fall to about 3-4 mg/L, fish start gasping for air at the surface or huddle around the water fall (higher concentration points). Above 5 mg/L, almost all aquatic organisms can survive indefinitely, provided other environmental parameters are present within allowable limits.
38. During inhalation, the ribs ____:
[A] Move inwards
[B] Move sideways
[C] Move upwards
[D] Move downwards
Show Answer
Correct Answer: C [Move upwards]
Notes:
The ribs help in the expansion and contraction of the thoracic cavity (though that is primarily the function of the diaphragm). When we inhale, the ribs move up and outwards while the diaphragm moves down. An exact opposite movement occurs during exhalation when the ribs move down and inwards while the diaphragm moves up. The outward movement of the ribs during inhalation expands our chest cavity increasing the space to accommodate air that rushes to lungs, whereas the inward movement of the ribs helps the carbon dioxide filled the air to be pushed out of the lungs.
39. An enzyme produced by HIV that allows the integration of HIV DNA into the host cells DNA is ____:
[A] Ligase
[B] Integrase
[C] Helicase
[D] DNA gyrase
Show Answer
Correct Answer: B [Integrase]
Notes:
HIV’s enzyme for inserting the DNA version of its genome into the host cell DNA is called its “integrase”. HIV-1 integrase catalyzes the “cut-and-paste” action of clipping the host DNA and joining the proviral genome to the clipped ends. It is also produced by viruses containing double-stranded DNAs for the same purpose.
40. Conglobate gland is a leaf like structure found in ____:
[A] Male Ascaris
[B] Male Cockroach
[C] Female Cockroach
[D] Female Ascaris
Show Answer
Correct Answer: B [Male Cockroach]
Notes:
Conglobate gland is a leaf like, median, unbranched gland of male cockroach. It lies below the ejaculatory duct and open into the genital pouch close to the male genital aperture.