Question

10. Which of the following statements are true regarding Photosystems?

A. Photosystems are arrangements of chlorophyll and other pigments packed into thylakoids.

B. Many Prokaryotes have only one photosystem.

C. Both A and B are correct.

D. Only A is correct.

Answer 1

Photosystems:

● Photosystems are arrangements of chlorophyll and other pigments packed into thylakoids.

●Many Prokaryotes have only one photosystem.

C. Both A and B are correct.

Answer 2

True statement: A) Photosystems are arrangements of chlorophyll and other pigments packed into thylakoids.

Prokaryotes posses one or more photosystems to convert light energy into chemical energy with the help of photosynthetic pigment molecules.

Photosystem definition:

"Photosystems are pigment-containing protein complexes that contain reaction centers that convert radiant energy into chemical energy."

Photosystem in prokaryotes:

• Prokaryotes store their photosynthetic pigments in infolded plasma membrane rather than in seperate organelles like eukaryotes. These infolded plasma membranes are also called as thylakoids.
• These membranes along with the pigments constitutes the photosystem which receives light energy through light-harvesting complex.
• This light energy is transferred through the pigment molecules and finally to the reaction centre where it undergoes oxidation thus releasing an excited electron.
• Different types of light-harvesting pigments absorb different wavelenghts of light and the pigment would reflect back the wavelenghts of light which cannot be absorbed.