Q. Chloroplasts without grana are known to occur in
A) Bundle-sheath cells of $C_{3}$-plants
B) Mesophyll cells of $C_{4}$-plants
C) Bundle-sheath cells of $C_{4}$-plants
D) Mesophyll cells of all plants
Explanation
The $C_{4}$-plants have dimorphic chloroplasts-granal and agranal. Chloroplasts in mesophyll cells are granal, i.e., they contain thylakoids that are stacked to form grana, as in $C_{3} -$plants. Chloroplasts of bundle sheath cells are agranal, i.e., grana are absent and the thylakoids are present only as stroma lamellae.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.