Biology MCQ For All Competitive Exams Set 2
Biology MCQ For All Competitive Exams Set 2
1. For which of the following diseases first successful vaccination was devloped (it is caused by Variola virus)?
Answer : C.
Smallpox was an infectious disease caused by one of two virus variants, Variola major and Variola minor. the World Health Organization (WHO) certified the global eradication of the disease in 1980.]
2. What is the name of premature death of cells and living tissue?
Answer : B.
Necrosis is the name of premature death of cells and living tissue. It refers to the death of most or all of the cells in an organ or tissue due to disease, injury, or failure of the blood supply.]
3. Even after attaining sexual maturity, the characteristics of the larva remain intact. What is it called?
Answer : B
Even after attaining sexual maturity, the characteristics of the larva that remain intact are called Neoteny. Neoteny is found in the Axolotl larva.]
4. Grassy shoot disease of sugarcane is caused by__.
Answer : C
Sugarcane grass shoot disease is caused by Candidatus Phytoplasma sacchari which are small, pleomorphic, pathogenic bacteria.]
5. Which of the following is the largest group of mammals?
Answer : A
Rodentia is the largest group of mammals. Rodents are mammals of the rodent order. It is characterized by a pair of continuously moving incisors in each of the upper and lower jaws.]
6. Cirrhosis is a disease that affects which among the following organs?
Answer : B.
Cirrhosis is a late stage of scarring (fibrosis) of the liver caused by many forms of liver diseases and conditions. Hepatitis and chronic alcohol abuse are frequent causes. Liver damage caused by cirrhosis can’t be undone.]
7. Which among the following is the location of Adrenal Glands in Human Body?
Answer : A.
Each adrenal gland is located on the top of each kidney (forming a hat-like structure on the top of the kidneys). Each adrenal gland has two parts viz. outer cortical portion and inner adrenal cortex. Further, there is a central part called adrenal medulla.]
8. Kangaroo is a member of which order?
Answer : B
Kangaroo is a mammal with a pouch. It is related to Marsupialia. Prototheria and Monotremata are primitive mammals.]
9. What is the World Health Organization (WHO) criteria for leprosy elimination?
Answer : B.
Leprosy is a bacterial disease caused by the bacteria Mycobacterium leprae which affects mainly the skin and nerves. As per WHO guidelines, when the number of leprosy patients gets reduced to below 1 case per 10,000 populations.]
10. Non-vascular embryophytes are __:
Answer : C.
Bryophytes are an informal group consisting of three divisions of non-vascular land plants: the liverworts, hornworts and mosses. They play a vital role in regulating ecosystems because they provide an important buffer system for other plants.]
11. What are the features of Phylum Mollusca?
Answer : D
Phylum Mollusca is a large group of animals. They have a bilaterally symmetrical and triploblastic, Less segmented body, well-developed organ and organ system, typically, open circulatory system and Limbs are present.]
12. Which ancient Indian physician is known as the ‘Father of Surgery’?
Answer : B.
Sushruta practiced during the 5th century B.C. many of his contributions to medicine and surgery preceded similar discoveries in the Western world. He is known as the ‘Father of Surgery’.]
13. What fraction of Human Blood is Plasma?
Answer : D.
Blood plasma is the liquid component of whole blood, and makes up approximately 55% of the total blood volume. It is composed primarily of water with small amounts of minerals, salts, ions, nutrients, and proteins in solution. In whole blood, red blood cells, leukocytes, and platelets are suspended within the plasma.]
14. How does calcium carbide ripen mangoes?
Answer : A.
For reasons of safe transportation of fruits, mangoes, bananas etc are picked before they ripen fully. Slightly green harvested mangoes are subjected to small containers of calcium carbide (CaC2) with a plastic covering. CaC2 reacts with the moisture in the air to release acetylene (or ethyne) gas as follows:
CaC2 + 2 H2O – C2H2 + Ca(OH)2
This option may give you slightest confusion if you don’t know the difference between Ethylene and Ethyne (Acetylene). Both are chemical substances produced by fruits to accelerate the normal process of fruit maturation — is a ripening hormone. Ethylene is C2H4 and has a carbon-carbon double bond. Acetylene is C2H2 and has a carbon-carbon triple bind. Acetylene contains more energy and burns hotter than ethylene. Ethylene is a gaseous compound , Acetylene is the chemical compound , which is the simplest alkyne and is also a hydrocarbon while Ethylene is the simplest alkene and classified as an unsaturated hydrocarbon. I hope you will never forget it now.]
15. Biometric is related to which of the following statement?
Answer : C.
Biometrics are calculations related to body measurements and human characteristics. Biometric authentication is used in computer science as a form of identification and access control.]
Biology MCQ For All Competitive Exams Set 2
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