BIOLOGY 1 Marks Question

The first acceptor of CO₂ in the C₄ pathway is phosphoenol pyruvate (PEP).

Chloroplasts are found in maximum quantity in the mesophyll cells of leaves.

According to Julius von Sachs, when a plant grows, glucose (sugar) is formed.

Priestley discovered oxygen in 1774.

1. Sunlight, 2. Concentration of CO₂.

The process of synthesis of ATP by cells is called phosphorylation.

The oxidation of chlorophyll occurs in the presence of oxygen. Therefore, it is called photo-oxidation of chlorophyll

Pheophytin is a strong reducing agent and O₂ is a strong oxidizing agent.

Transport of food material takes place in the form of sucrose.

Rubisco is the most commonly found protein. It constitutes 16% of the chlorophyll.

Its rate depends on environmental factors, of which concentration of CO₂, intensity of light, availability of water and temperature are the main ones. Its rate also depends on the age of the leaf and the amount of chlorophyll and accessory pigments.

It is produced in the cytoplasm of the mesophyll cell.

In the matrix of chloroplast.

Used in the Calvin cycle of photosynthesis. Two importance- (i) It starts this process, (ii) It accepts CO₂.

Formation of NADP H₂ and emission of O₂.

Both PS-I and PS-II.

Phosphoglyceric (PGA).

Nicotinamide-adenine-dinucleotide phosphate.

In the photosynthesis system, the release of CO₂ and absorption of O₂ through respiration in the presence of light is called photorespiration.

By Chlorophyll a (P₇₀₀).

Blackman had stated the limiting factor rule. According to this, the speed of any action depends on the factor which is relative minimum.

Chlorobium chlorophyll and bacteria chlorophyll.