91. The tallest plant in the world is
| Answer : Option C |
| Explanation : |
| Eucalyptus.Eucalyptus regnans is the tallest of all flowering plants, & possibly the tallest of all plants, although no living specimens can make that claim. The tallest measured living specimen, named Centurion, stands 101 metres tall in Tasmania. |
92. Ptyalin is an enzyme produced in the
| Answer : Option B |
| Explanation : |
93. Scurvey is caused by:
| Answer : Option C |
| Explanation : |
| Vitamin 'C'.Scurvy is a disease resulting from a deficiency of vitamin C (ascorbic acid). Scurvy can be prevented by consuming enough vitamin C, either in the diet or as a supplement. It is sometimes also referred to as Barlow's disease, named after Sir Thomas Barlow, a British physician who described it in 1883. |
94. Rabies is caused by
| Answer : Option C |
| Explanation : |
| virus.Rabies is a viral disease that causes acute encephalitis in warm-blooded animals. The disease is zoonotic, meaning it can be transmitted from one species to another, such as from dogs to humans, commonly by a bite from an infected animal. |
95. Flowers emit fragrance to:
| Answer : Option D |
| Explanation : |
| attract insects.Flowers emit fragrance to attract pollinators which are mainly insects. The fragrance plays a main role in the localization & selection of flowers by insects, especially moth-pollinated flowers, which are detected & visited at night. |
96. The disease which has been eradicated:
| Answer : Option B |
| Explanation : |
| Small pox.Smallpox was an infectious disease caused by either of two virus variants, Variola major & Variola minor. Smallpox is one of two infectious diseases to have been eradicated, the other being rinderpest which was declared eradicated in 2011. After vaccination campaigns throughout the 19th & 20th centuries, the WHO certified the global eradication of smallpox in 1979. |
97. The sense of balance is attained by:
| Answer : Option C |
| Explanation : |
| Cerebellum equilibrium.The cerebellum equilibrium controls the aspects of balance, equilibrium, & muscle tone, which are factors that provide for smooth movement & activity. Electrical impulses from the cerebellum stimulate muscles that are responsible for voluntary movement, & it works in coordination with the motor cortices of the cerebrum for this overall function. |
98. The H5N1 virus which causes bird flu was 1st discovered in
| Answer : Option C |
| Explanation : |
| 1997.Influenza A virus subtype H5N1, also known as 'bird flu', A (H5N1) or simply H5N1, is a subtype of the influenza A virus which can cause illness in humans & many other animal species. In 2002, new isolates of H5N1 were appearing within the bird population of Hong Kong. H5N1 isolates found in Hong Kong in 1997 & 2001 were not consistently transmitted efficiently among birds & did not cause significant disease in these animals. These new isolates caused acute disease, including severe neurological dysfunction & death in ducks. This was the 1st reported case of lethal influenza virus infection in wild aquatic birds since 1961. |
99. Jonas Salk invented the vaccine for
| Answer : Option C |
| Explanation : |
| Polio.Jonas Edward Salk was an American medical researcher & virologist, best known for his discovery & development of the 1st polio vaccine. On April 12, 1955, Dr. The field trial set up to test the vaccine developed by Salk & his research team was the most elaborate program of its kind in history, involving 20,000 physicians & public health officers, 64,000 school personnel, & 220,000 volunteers,' with over 1,800,000 school children participating in the trial. Thomas Francis, Jr., of the University of Michigan, the monitor of the test results, |
100. Which among the given plant shows chloroplast dimorphism -
| Answer : Option B |
| Explanation : |
| Certain plans which possess the C4 dicarboxylic acid pathway of CO2 fixations show a structural dimorphism of chloroplast structure. Sugarcane is a common example of C4 plant that has dimorphic chloroplast. The mesophyll cells possess chloroplasts with well developed grana whereas the bundle sheath chloroplasts lack the organization of grana (Agranal chloroplasts). The malic acid is transported to the bundle sheath chloroplast (Transportations). Here it is converted to pyruvic acid & CO2 by NADP+ malic enzyme (Decarboxylation). The pyruvic acid is then transported to mesophyll chloroplasts (Transportation). |
101. What may be the cause of malfunctioning of thyriod gland -
| Answer : Option C |
| Explanation : |
| Iodine deficiency.The main reason for thyroid malfunctioning is the deficiency of Iodine. Since iodine is a trace mineral found in food that combines with Tyrosine to make both T3 & T4, both of the hormones produced in the thyroid, a lack of it can lead to under production of thyroid hormones. |
103. The 'Red Data Book' is the documentation of endangered rare species of:
| Answer : Option A |
| Explanation : |
| LDC, DEO & PA/SA Exam, 15.2016 TF No.11. 7203752) A Red Data Book contains lists of species whose continued existence is threatened. Species are classified into different categories of perceived risk. It documents rare & endangered species of animals, plants & fungi, in addition other living organisms in an area, region or country. |
104. Tamiflu is frontline drug against
| Answer : Option D |
| Explanation : |
| bird flu.Oseltamivir marketed under the trade name Tamiflu, is an antiviral drug, which may slow the spread of influenza (flu) virus between cells in the body by stopping the virus from chemically cutting ties with its host cell. It has been used to treat & prevent influenza A virus & influenza B virus infection in over 50 million people since 1999. The drug is taken orally in capsules or as a suspension. |
105. Which among the given is the best source of Iodine -
| Answer : Option B |
| Explanation : |
| Beans.Iodine exists in soil, but the content may vary as soil erosion can leach away this & other minerals. Vegetables highest in iodine include spinach, Swiss chard, turnip greens, summer squash & white potatoes with the peel. Beans & seeds highest in iodine content include lima beans, soybeans, cooked navy beans & sesame seeds. The herb highest in iodine is garlic. |
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