Assertion : Chloroplasta occur inside the leaves mostly in mesophyll cells along their walls.
Reason: The membrane system of chloroplast is responsible for trapping the light energy and also for the synthesis of ATP and NADPH.

In the given statements (i-iv) i) The chlorophyll a is yellow green in colour and chlorophyll b is blue green in colour. ii) Both photosystems absorb more amount of red wavelength. iii) In moderate light, the chloroplasts arrange themselves with their flat surfaces perpendicular to the incident light while during strong illumination, they are parallel to the incident light. iv) The stroma of chloroplast is responsible for trapping the light energy and also for synthesis of ATP and NADPH. Find out the correct statements

Identify the correct statement w.r.t. the given cell A. Concerned with lipid and steroidal hormone synthesis B. Outer non- living rigid structure which gives shape to the cell and protects from mechanical damage and infaction . C. Both lie perpendicular to each other and each has an organisation like the cart wheel . D. Responsible for trapping light energy for the synthesis of sugar. E. Present in cells actively involved in protein synthesis and secretion. F. Spherical structures rich in hydrolytic enzymes.

Identify the correct statement w.r.t. the given cell A. Concerned with lipid and steroidal hormone synthesis B. Outer non- living rigid structure which gives shape to the cell and protects from mechanical damage and infaction . C. Both lie perpendicular to each other and each has an organisation like the cart wheel . D. Responsible for trapping light energy for the synthesis of sugar. E. Present in cells actively involved in protein synthesis and secretion. F. Spherical structures rich in hydrolytic enzymes.

Assertion : Krebs cycle occurs in the mitochondria matrix. Reason: The electrons, as they move through the system, release energy which is trapped by ADP to synthesize ATP.

Assertion: The external factors that affected photosynthesis are number, size age and orientation of leaves, mesophyll cells and chloroplasts and the amount of chlorophyll. Reason: The internal factors that affect photosynthesis are availability of sunlight, temperature CO_(2) concentration and water.

Assertion: The external factors that affected photosynthesis are number, size age and orientation of leaves, mesophyll cells and chloroplasts and the amount of chlorophyll. Reason: The internal factors that affect photosynthesis are availability of sunlight, temperature CO_(2) concentration and water.

There are two important fuels A and B both of which are extracted from deep inside the earth. Fuel A is a thick, dark, foul smelling liquid whereas fuel B is a black solid. Combustion of both the fuels produces products, C, D, E and F. The product C makes the rainwater only slightly acidic but it is mainly responsible for causing global warming. The product D is neither acidic nor basic. It is harmless and does not affect the environment in any way. Both E and F attack breathing system of humans and are mainly responsible for causing acid rain. In addition to combustion of fuels A and B, the product F is also formed when lightning occurs in the sky. (a) What are (i) fuel A, and (ii) fuel B ? (b) Name (i) C (ii) D (iii) E, and (iv) F (c ) What is the process of formation of F during lightning known as ? (d) Which fuel is supposed to be exhausted sooner : A or B ? (e) Which fuel is mostly used for generating electricity at thermal power plants ?

Assertion :- Cells oxidise glucose and other respiratory substances not in one step, but in several small steps. Reason:- Oxidation in multiple steps enabling some steps to be just large enough such that the energy released can be coupled to ATP synthesis.