16. Improper handling and storage of cereal grains and oilseeds result in the production of toxins known as aflatoxins which are not generally destroyed by normal cooking process. Aflatoxins are produced by
bacteria
protozoa
moulds
viruses
17. Which of the following adds / add nitrogen to the soil? 1. Excretion of urea by animals 2. Burning of coal by man 3. Death of vegetation
Select the correct answer using the codes given below.
1 only
2 and 3 only
1 and 3 only
1, 2 and 3
18. Which of the following diseases can be transmitted from one person to another through tattooing? 1. Chikungunya
2. Hepatitis B 3. HIV-AIDS
19. Consider the following minerals: 1. Calcium
2. Iron 3. Sodium
Which of the minerals given above is/are required by human body for the contraction of muscles?
20. Recombinant DNA technology (Genetic Engineering) allows genes to be transferred 1. across different species of plants 2. from animals to plants 3. from microorganisms to higher organisms