Tag: photosynthetic pigments

• A thylakoid refers to the membrane-bound internal compartment within the chloroplasts of a plant cell and cyanobacteria.
  
• It is a site for light-dependent reactions of photosynthesis. 
• It is made up of a thylakoid membrane which surrounds the thylakoid lumen.
• A stack of thylakoid disk is organized to form grana.
• Within a chloroplast of a plant cell, there are about 40- 60 grana and each granum are composed of 10 to 100 thylakoids.
• So, the correct answer is '40-60'.

• The chloroplast is a discoid plastid which contains chlorophyll (green pigment) within the thylakoid membranes of the organelle.
  
• This organelle is present in the green parts of plants where photosynthesis takes place.
  
• It is the main site of synthesis of glucose by the process called photosynthesis.
  
• The chlorophyll pigment captures the sunlight and converts it into chemical energy and thus, helps in the process of photosynthesis.
  
• So, the correct answer is 'Discoid'.

• A thylakoid refers to the membrane-bound internal compartment within the chloroplasts of a plant cell and cyanobacteria.
  
• It is a site for light-dependent reactions of photosynthesis. 
• It is made up of a thylakoid membrane which surrounds the thylakoid lumen.
• A stack of thylakoid disk is organized to form grana.
• There are about  10 to 100 thylakoids within a granum and about 40- 60 grana in a plant cell.
• So, the correct answer is '10-100'.

• Quantasomes occur in the Grana/chloroplast.
• Quantasomes can be defined as small particles found in the thylakoid membrane of the chloroplasts.
• These particles are embedded in a paracrystalline form on the surface of thylakoid discs in chloroplasts.
  
• So, the correct answer is 'Grana/chloroplast'.

Plastids are considered as sac-like organelles, generally involved in the formation or storage of food. These are chloroplast, chromoplast and leucoplast and are same in their structure to transform into one another during the requirement.

• Plastids are a pigment containing double membrane-bound organelle which is the site of manufacture and storage of chemical compounds.
  
• The chloroplast is a plastid which contains the green coloured pigment called chlorophyll and are present in the green parts of the plants that take part in the process called photosynthesis.
• The outer chloroplast envelope is made up of lipid (20%-30%).
• So, the correct answer is '20-30%'.

The photophosphorylation reaction involves the conversion of ADP to ATP in the presence of sunlight. This takes place in the thylakoid membrane. The photosystem I and II that involves the electron carriers; are present in the thylakoid membranes of the chloroplast. here the light reaction of photosynthesis takes place.

Stroma, refers to the colourless fluid surrounding the grana within the chloroplast. Within the stroma are grana, stacks of thylakoids, the sub-organelles, where photosynthesis is commenced before the chemical changes are completed in the stroma. The internal space enclosed by the chloroplast double membrane but excluding the thylakoid space. This space, filled with a colorless hydrophilic matrix, contains DNA, ribosomes and some temporary products of photosynthesis also known as chloroplastic stroma.