Question

Draw a labelled diagram of a plant cell? Explain the structure and function of the following organelles? (a) Chloroplast
(b) Endoplasmic reticulum
(c) Mitochondria
(d) Nucleus

Answer 1

endoplasmic reticulum

Answer 2

Dear Student,

[Refer to the image for well labeled diagram of plant cell.]

(a) Chloroplast -

• Structure of chloroplast shows double-membrane, granular stroma, lamellar system, chloroplast DNA and osmophilic granules.

Functions of chloroplast -

• It is the site of photosynthesis.
• It gives green colour to plant leaves.

(B) Endoplasmic reticulum -

• It is closed organelle consisting of cisternae continuing with nuclear membrane.
• It can be smooth or rough based on presence of ribosomes.

Functions of endoplasmic reticulum -

• Protein and lipid synthesis occurs here.
• It carry outs folding and transport of proteins.

(C) Mitochondria -

• The mitochondrion is a double-membrane bound organelle found in most eukaryotic organisms.

Functions of mitochondria -

• It is powerhouse of the cell.
• It is site Krebs cycle and beta-oxidation of compounds.
• It provides enzymes for electron-transport chain.

(D) Nucleus -

• It contains cell's genetic material especially DNA.
• Nucleic acids are formed of deoxyribose sugar, a nitrogen base and a phosphate group.

Functions of nucleus -

• It controls gene expression.
• It carry outs replication of DNA.
• Controls various functions of cell.

Best luck dear...