General Science Class 9 MCQS

The breakdown of food molecules to release energy is called?

1. Photosynthesis
2. Fermentation
3. Respiration
4. Mitosis

Each mole of glucose produce maximum energy i.e :

1. 2527 Kj
2. 2627 Kj
3. 2727 Kj
4. 2827 Kj

Sea food is an excellent source of protein because it's usually low in :

1. Fats
2. Carbohydrates
3. Proteins
4. Minerals

Iron deficiency is associated with decreased cognitive abilities and resistance to :

1. Infections
2. Diseases
3. Allergies
4. Inflammation

Wave of rhythmic movements of muscle contraction and relaxation called?

1. Digestion
2. Absorption
3. Peristalsis
4. Defection

Liquid secreted by the pancreas, which contains a variety of :

1. Hormones
2. Vitamins
3. Acids
4. Enzymes

Living organisms which derive their food from dead and decaying organic materials called?

1. Saprotrophs
2. Parasites
3. Predators
4. Producers

Nutrients that are needed in the highest concentration called?

1. Micronutrients
2. Macronutrients
3. Essential nutrients
4. Trace elements

Fertilizers are substances containing chemical elements such as manure or mixture of :

1. Lipids
2. Carbohydrates
3. Nitrates
4. Proteins

High solubility of fertilizers also degrades ecosystem through :

1. Acidification
2. Erosion
3. Salinity
4. Eutrophication