Chapter 7.2, Problem 1CYL

Summary Introduction

To list: The light-capturing molecules in chloroplasts and also describe its functions.

Introduction:

Chloroplast is the only cell organelle which is found in leaves of plants. It helps in photosynthesis by converting light energy into chemical energy to produce food for plants in the form of glucose which is stored in leaves of the plant in the form of sucrose.

Summary Introduction

To draw: The molecules found within thylakoid membrane and also explain how they capture and transfer light energy.

Introduction:

The photosynthesis is a process in which the green plants and algae obtains their nutrients. This process takes place in chloroplast where chlorophyll molecules are present. The chloroplast contains thylakoid molecules where light reaction takes place. The end product of the light reaction is the formation of ATP and NADPH which is an energy storing molecule which together helps in driving the Calvin cycle in stroma of chloroplast.

Summary Introduction

To describe: The products of light reactions and role of each product.

Introduction:

The light reactions take place in the thylakoid membrane of chloroplast where the two photosystem units are present. This light reaction of photosyntesis is also called as Z scheme because the light first strike to photosystem unit I where ${\text{2e}}^{\text{-}}$ (two electrons) are released and then these electrons along with some additional light strikes in photosystem II. The end product of light reaction is the production of ATP and NADPH.

Summary Introduction

To explain: The process of generation of ATP.

Introduction:

Adenosine triphosphate (ATP) is the “energy currency” of cells, which is required to carry out all the cellular processes. ATP within cells acts as an instant source of energy. Guanosine triphosphate (GTP) is another energy rich nucleotide use in cellular reaction. GTP is analogous to ATP, which is comprised of ribose sugar, guanine and three phosphate groups.