Question: Chlorophyll contains –
1. Iron
2. Copper
3. Magnesium
4. Manganese
Answer: 3
Question: Yeast is an example of –
1. bacteria
2. fungus
3. virus
4. algae
Answer: 2
Question: Forest fires are natural sources of –
1. Carbon monoxide
2. Hydrocarbons
3. Hydrogen sulphide
4. Nitrogen dioxide
Answer: 1
Question: ATP stands for –
1. Adenosine triphosphate
2. Alanine triphosphate
3. Adrenalin triphosphate
4. Asparagine triphosphate
Answer: 1
Question: Carotene is found in –
1. Lemon
2. Carrot
3. Radish
4. Turnip
Answer: 2
Question: Trees shed their leaves in winter season to –
1. Conserve heat
2. Take rest after the summer growth
3. Conserve water
4. Escape being eaten by animals
Answer: 1
Question: Which one of the following sets of elements was primarily responsible for the origin of life on the earth?
1. Hydrogen, Oxygen, Sodium
2. Carbon, Hydrogen, Nitrogen
3. Oxygen, Calcium, Phosphorus
4. Carbon, Hydrogen, Potassium
Answer: 2
Question: A genetically engineered form of brinjal known as the BT-brinjal has been developed. The objective of this is –
1. To make it pest resistant
2. To improve its taste and nutritive qualities
3. To make it drought resistant
4. To make its shelf life longer
Answer: 1
Question: Regular intake of fresh fruits and vegetables is recommended in the diet since they are a good source of antioxidants. How do antioxidants help a person maintain health and promote longevity?
1. The activate the enzymes necessary for vitamin synthesis in the body an help avoid unnecessary wastage of energy
2. They prevent excessive oxidation of carbohydrates, fats and proteins in the body and help avoid unnecessary wastage of energy
3. They neutralise free radicals produced in the body during metabolism
4. The activate certain genes in the cells of the body and help delay the ageing process
Answer: 3
Question: Foot and Mouth disease occurs in –
1. Cattle
2. Cattle and Sheep
3. Cattle and Pigs
4. Cattle, Sheep and Wine
Answer: 3
Question: The naturally occurring anticoagulant in the human blood is –
1. Hirudin
2. Heparin
3. Fibrinogen
4. Serotonin
Answer: 2
Question: The term ‘gene’ for the factors controlling heredity was coined by –
1. Gregor-Mendal
2. Hugo de vries
3. T.H. Morgan
4. W. Johannsen
Answer: 4