Monday, August 20, 2012

STPM Biology - chapter 5 (old syllabus) chapter 5 (new syllabus): Revision essay question 7

7. Describe the structure of mitochondrion.

Answer


-         Mitochondria are rod or spherical shaped.
-         Has length of about 1-10µ and width 0.25-10µm
-         It is covered by two membrane.
-         The outer membrane controls the movement of chemical substances in and out from the mitochondria.
-         The inner membrane is folded to form cristae to increase the surface area for electron transport system and oxidative phosphorylation to take place.
-         There are many stalked particles on the cristae surface.
-         The matrix of the mitochondrion is rich with proteins,enzymes,DNA, and ribosomes.

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