Given below are five terms. Rewrite the terms in the correct order so as to be in logical sequence with regard to photosynthesis: (i) water molecules, (ii) oxygen, (iii) grana, (iv) hydrogen and hydroxyl ions, (v) photons.

Fill in the blanks with the appropriate answer from the choices given in the brackets.

(a) The site of light reaction in the cells of a leaf is ..................(cytoplasm, stroma, grana).

(b) The chemical substance used to test the presence of starch in the cell of a leaf is............... (CaCl₂, iodine solution, Benedict solution).

(c) Stroma is the ground substance in ............... (cytoplasm, chloroplast, ribosomes).

(d) The dark reaction of photosynthesis is known as............... (Hill reaction, cyclic phosphorylation, Calvin cycle).

(e) In the flowering plants, food is transported in the form of ........................... (sucrose, glucose, starch).

Are the following statements true or false? Give reason in support of your answer.

(a) The rate of photosynthesis continues to rise as long as the intensity of light rises.

(b) The outside atmospheric temperature has no effect on the rate of photosynthesis.

(c) If you immerse a leaf intact on the plant in ice cold water, it will continue to photosynthesize in bright sunshine.

(d) Destarching of the leaves of a potted plant can occur only at night.

(e) The starting point of carbon cycle is the release of CO₂ by animals during respiration.

(f) If a plant is kept in bright light all the 24 hours for a few days, the dark reaction (biosynthetic phase) will fail to occur.

(g) Photosynthesis is considered as a process supporting all life on earth.

State any four differences between photosynthesis and respiration.

"Oxygen is a waste product of photosynthesis." Comment.