The structure of the chloroplast

There are two membranes, and inside the inner membrane is the gelatanous matrix called the stroma. The stroma contains ribosomes, DNA, and is the location for biochemical synthesis. Membranous sacs called thylakoids are arranged in stacks called grana. The chlorophyll in the thylakoid membranes carries out photosynthesis.

The major components of a chloroplast are as illustrated and explained below.

Photosynthetic reactions occur in the grana and stroma of chloroplasts.




Thylakoids of grana are the sites for light reactions of photosynthesis.


Chloroplast: Structure and Function - BiologyWise

Each component of a chloroplast has a unique role in photosynthesis and photorespiration.

An absorption spectrum is a graph showing the percentage of light absorbed by pigments within the chloroplast, for each wavelength of light. An example is the absorption spectrum of chlorophyll a and b. The best absorption is seen with violet-blue light. There is also good absorption with red-orange light. However most of the green-yellow light is reflected and therefore not absorbed. This wavelength of light shows the least absorption.


Chloroplast - an overview | ScienceDirect Topics

The resulting molecules are converted into starch and stored in the chloroplast or transported into the cytosol where they are converted to sugars, amino acids, and fatty acids.


Photorespiration is a process involving , in a light-dependent manner.

Parts and Functions of the Chloroplast Flashcards | Quizlet

Immediatelyafter exposure to 14CO2, the plant's photosynthetic tissue iskilled by immersing it in boiling alcohol, and all of the biochemical reactions cease.

Chloroplast structure and function Flashcards | Quizlet

In addition to this the components of chloroplast participate in several regulatory functions of the cell as well as in photorespiration.

The role of chloroplasts in photosynthesis has been illustrated below followed by a description of the roles of different components of chloroplasts


The main function of the chloroplast is photosynthesis.

They are also the sites for nitrogen fixation, the reactions of which are interconnected with the processes of photosynthesis and photorespiration, and play a protective role in plant cells.

Chloroplast | Definition of Chloroplast by Merriam …

Tiny vesicles bud off from the inner membrane of the chloroplast, and assemble to form the tubules of peripheral reticulum.


Chloroplasts are the site for photosynthesis, which comprises a set of light-dependent and light-independent reactions to harness solar energy and convert it into chemical energy.