1.Consider the following pairs:
Commonly used/consumed materials - Unwanted or controversial chemicals likely to be found in them
1. Lipstick – Lead
2. Soft drinks – Brominated vegetable oils
3. Chinese fast food – Monosodium glutamate
Which of the pairs given above is/are correctly matched?
a) 1 only
b) 2 and 3 only
c) 1 and 3 only
d) 1, 2 and 3
2. Organic Light-Emitting Diodes (OLEDs) are used to create a digital display in many devices.
What are the advantages of OLED displays over Liquid Crystal displays?
1. OLED displays can be fabricated on flexible plastic substrates.
2. Roll-up displays embedded in clothing can be made using OLEDs.
3. Transparent displays are possible using OLEDs.
Select the correct answer using the code given below:
a) 1 and 3 only
b) 2 only
c) 1, 2 and 3
d) None of the above
3. What is the application of Somatic Cell Nuclear Transfer Technology?
a) Production of bio-larvicides
b) Manufacture of biodegradable plastics
c) Reproductive cloning of animals
d) Production of organisms free of diseases
4. With reference to agriculture in India, how can the technique of ‘genome sequencing’, often seen in the news, be used in the immediate future?
1. Genome sequencing can be used to identify genetic markers for disease resistance and drought tolerance in various crop plants.
2. This technique helps in reducing the time required to develop new varieties of crop plants. 3. It can be used to decipher the host-pathogen relationships in crops.
Select the correct answer using the code given below:
a) 1 only
b) 2 and 3 only
c) 1 and 3 only
d) 1, 2 and 3
Answer: 1-D; 2-C; 3-C; 4-D;
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