11. Which of the following is the easiest way of finding out the nutritional status for large number of children in a short time? (UPSC Prelims 1982)
[A] Studying their behaviour
[B] Studying their hair, face and eyes
[C] Measuring their height and weight
[D] All of the above
Show Answer
Correct Answer: C [Measuring their height and weight]
Notes:
The nutritional status of a large number of children can be calculated by knowing their body mass index .It is a physical measurement used to assess total amount of body fat. It is calculated by dividing your weight in kilograms (kg) by the square of your height in metres (m2). Depending on the BMI value calculated, one may be underweight, normal weight, overweight or obese.
12. Where does the Fat stored in human body? (UPSC Prelims 1983)
[A] Muscular tissue
[B] Connective tissue
[C] Adipose tissue
[D] Epithelial tissue
Show Answer
Correct Answer: C [Adipose tissue]
Notes:
Adipose tissue is an anatomical term for loose connective tissue composed of adipocytes. Its main role is to store energy in the form of fat, although it also cushions and insulates the body.
13. Which of the following diseases is hereditary? (UPSC Prelims 1987)
[A] Haemophilia
[B] Tuberculosis
[C] Cancer
[D] Dysentery
Show Answer
Correct Answer: A [Haemophilia]
Notes:
Haemophilia is a mostly inherited genetic disorder that impairs the body’s ability to make blood clots, a process needed to stop bleeding. This results in people bleeding longer after an injury, easy bruising, and an increased risk of bleeding inside joints or the brain.
14. Which gas is released during the process of photosynthesis in plants?
[A] Carbon dioxide
[B] Methane
[C] Oxygen
[D] Nitrogen
Show Answer
Correct Answer: C [Oxygen]
Notes:
Inputs of photosynthesis are carbon dioxide and water and outputs are glucose and oxygen. Photosynthesis occurs in the presence of sunlight.
15. What is a jelly-like substance found floating inside the plasma membrane called?
[A] Cell sap
[B] Cytoplasm
[C] Karyoplasm
[D] Mitochondria
Show Answer
Correct Answer: B [Cytoplasm]
Notes:
The jelly-like substance inside the plasma membrane in which all the organelles float is called cytoplasm.
16. Which of the following protects the body from infectious disease?
[A] Leukocytes
[B] Red Blood Cells
[C] Endoplasmic Reticulum
[D] Golgi Bodies
Show Answer
Correct Answer: A [Leukocytes]
Notes:
White blood cells (WBC), also called leukocytes or leukocytes. Immune system cells that help protect our body from infectious diseases.
17. The biological nature of the virus came from studies by the Russian scientist ____ in 1892 and by the Dutch scientist ____ in 1898.
[A] Dmitry I. Ivanovsky, Martinus W. Beijerinck
[B] Martinus W. Beijerinck, Dmitry I. Ivanovsky
[C] Félix H. d’Hérelle, Frederick W. Twort
[D] Frederick W. Twort, Félix H. d’Hérelle
Show Answer
Correct Answer: A [Dmitry I. Ivanovsky, Martinus W. Beijerinck]
Notes:
The biological nature of viruses was discovered in 1892 by the Russian scientist Dmitry I. Ivanovsky and in 1898 the Dutch scientist Martinus W. Beijerinck’s studies.
18. The change from lysogeny to lymph is usually induced by?
[A] ultraviolet light
[B] chemicals
[C] irradiation
[D] all of these
Show Answer
Correct Answer: A [ultraviolet light]
Notes:
The change from lysogeny to lymph is usually induced by ultraviolet light. Lysogeny is a type of life cycle that occurs when a bacteriophage infects certain types of bacteria.
19. Which of the following is not a characteristic of secondary growth?
[A] an increase in thickness or girth of the plant
[B] caused by cell division in the lateral meristem
[C] lacking in herbaceous plants
[D] occurs at the apices, or tips, of stems and roots.
Show Answer
Correct Answer: D [occurs at the apices, or tips, of stems and roots.]
Notes:
An increase in stem thickness, which occurs as a result of secondary growth. This is due to the activity of lateral meristem which herbaceous plants lack. The lateral meristem includes the vascular cambium and, in woody plants, the cork cambium.
20. What causes wheat tundu disease?
[A] Pythium debaryanum
[B] Albygo candida
[C] Clavibacter tritici
[D] Puccinia striiformis
Show Answer
Correct Answer: C [Clavibacter tritici]
Notes:
Tundu disease of wheat is caused by infection with a bacterial pathogen called Clavibacter tritici.
