Question

A plant cell has all of the following organelles except

• A. Chloroplasts
• B. Cell wall
• C. Centrioles
• D. Large central vacuole
• E. Mitochondria

Answer 1

The correct option is C Centrioles

A. Chloroplasts are the green coloured plastids which are involved in photosynthesis. The chloroplast is double membrane bound structure consisting of an outer and inner membrane separated by intermembrane space.

B. Cell wall is the outermost, rigid, protective, non-living and supporting layer found in plant cells, bacteria, cyanobacteria and some protists but absent in animal cells.

C. In animal cells, just outside the nucleus, an area called centrosome is present. It contains the organelles called as centrioles. These are the structures associated with spindle formation during cell division.

D. Large central vacuole is present only in plant cells. About 90% of plant cells is occupied by a single membrane bound vacuole. It stores macromolecules including ions, sugars, amino acids, proteins and carbohydrates.

E. Mitochondrion is known as power house of the cell because these are associated with cellular respiration and energy generation of the cell. Mitochondrion is present only in eukaryotes (i.e. present in plant cell also).

Hence Centrioles are not present in a plant cell. So, the correct answer is 'Centrioles'.