Question

The two different regions of chloroplasts are
A. Grana, stroma
B. Thylakoid, stroma
C. Lamellae, plasma
D. Villi, cristae

Answer 1

Hint: Chloroplasts are disc shaped organelles enclosed in a double membranous envelope consisting of inner and outer membranes. This organelle is characterized by the presence of stacks of disks and matrix containing starch granules, enzymes, etc. It carries out photosynthetic processes thus producing food.

Complete answer:
Chloroplasts are green color plastids that are found in all green tissues of plant bodies more specifically they are concentrated in the parenchymatous cells of the leaf mesophyll. Two pigments, namely chlorophyll a and chlorophyll b are present in these plastids which are solely responsible for imparting green color to it. These pigments' major function is to absorb light energy.
Chloroplasts are internally divided into three major compartments namely:
Intramembranous space, which is present between the two membranes of the chloroplast envelope.
Stroma, which is the matrix or colorless fluid present inside the envelope. It consists of chloroplasts genome, enzymes and granules of starch.
Thylakoid lumen, which is enveloped by membranes of thylakoid. In higher plants, these thylakoids are stacked tightly in the form of grana which are connected to other grana through stromal lamellae.

So, the correct answer is option “A” , that is the two different regions of chloroplasts are grana and stroma.

Note: Chloroplast is a structure present within green algae and plant cells. It is the site where photosynthesis is carried out. Chloroplast organelle captures light energy and converts it into the chemical energy thus producing food in the form of energy rich compounds which are organic and oxygen.