Autotrophic nutrition

Which among the following, are simple inorganic substances?

• protein

• carbohydrates

• carbondioxide

Which of the following are complex organic substances?

• water

• nitrogen

• proteins

Which of the following are autotrophs?

• animals

• green plants

• fungi

Organisms use biocatalysts to break down complex substances into simpler ones. These biocatalysts are also known as______________

• Hormones

• Enzymes

• lipids

Which of the following is the correct way of defining the term photosynthesis?

• The process in which autotrophs take in carbon dioxide, water and minerals in the presence of sunlight and chlorophyll to synthesize carbohydrates is called photosynthesis

• The process in which carbohydrates are utilised to provide energy is called photosynthesis.

• The process in which heterotrophs depend on plants for food is called photosynthesis.

The carbohydrates that are not used immediately in animals are stored as _________ in liver.

• glucose

• Glycogen

• starch

The given image shows the equation for _______

• Photosynthesis

• Respiration

• excretion

Which of the following events do not occur during photosynthesis?

• Absorption of light energy by chlorophyll.

• Conversion of light energy to chemical energy.

• splitting of water into hydrogen and oxygen.

• Oxidation of carbohydrates into carbon dioxide and water

• Reduction of carbon dioxide to carbohydrates.

The opening and closing of stomata is a function of _____cells.

• mesophyll cells

• epidermal cells

• guard cells

In the experiment to prove that carbon dioxide is necessary for photosynthesis, potassium hydroxide is used in one of the experimental set up. It is used to

• Absorb carbon dioxide

• release carbon dioxide

• clean air inside set up