Question

Agranal chloroplast are found in
A) Bryophytes
B) Gymnosperms
C) Green algae
D) Angiosperms

Answer 1

A plant in which the $C{O_2}$ is first fixed to a compound containing four carbon atoms before entering the photosynthesis cycle of Calvin. Agranal means that few rudimentary grana are present.

Complete answer:

Chloroplast has a coin-shaped structure known as the Thylakoid, which is placed one above the other to form stacks known as grana. Some chloroplasts do not form grana. E.g. chloroplasts in guard cells and algal cells. Due to the nuclear mutation of the gene, grana stacking in both lower and higher plants is affected.
$C_4$ plant leaf mesophyll cell chloroplasts exhibit grana similar to higher plant chloroplasts. Sugarcane is a $C_4$ plant and the bundle of sugar cane leaves contains agranate chlorophyll. Pea and mango are C3 plants that contain grana chloroplasts.
Agranal chloroplast is found in an abundance of green algae.It is not found in any of the above options, such as bryophytes, gymnosperms, angiosperms, etc.This is because the green algae do not consist of Grana and, as a result, Agranal chloroplast is found in Grana.Agranal type of chloroplast lacks grana and contains only stroma and stroma lamellae in the inner layer.

The correct option is option (C) i.e, Green algae.

Note: Chloroplast, a structure within plant cells and green algae that is the site of photosynthesis, a process by which light energy is converted to chemical energy, resulting in the production of oxygen and energy-rich organic compounds.