Densities of Organelles in a Cell

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Card 1: What does the phrase "density of Organelle" means?

Density of Organelle

Density of organelle is refering to the abundance of certain organelles found in a cell.

The density of an organelle in a cell is related to the specific function of the cell.

Card 2: Give an example of specific cell where the density of chloraplast is high and suggest a reason for that.

Example of cell with high density of chloroplast.

Cells Reason
Palisade mesophyll cell To trap sunlight to synthesise carbohydrate during photosynthesis.

(Image created by H McKenna using Inkscape. This file is licensed under the Creative Commons Attribution ShareAlike 2.5 License. The original file can be found in the wikipedia.)

Card 3: Give 3 examples of specific cell where the density of mitochondria is high and suggest a reason for that.

Examples of cell with high density of mitochondria

Cells Reason
Sperm cells Need energy to move through the uterus towards the Fallopian tubes.
Muscle cells Contraction of muscle during movement need a lot energy
Meristem Cells Meristem cells in the plant shoots and roots are involved in cell division to produce new cells for growth. It needs a lot of energy for the activities.
Card 4: Give 2 examples of specific cell that has high density of endoplasmic recticulum and suggest a reason for that.

Examples of cell with high density of endoplasmic recticulum

Cells Reason
Cells in salivary gland Active in synthesing and secreting digestive enzyme
Pancreatic Cells Active in synthesing and secreting hormone and enzyme
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