Rohan007best
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I have 3 questions.

1) I can't understand the language in the textbook its really confusing with these new scientific words what do I do?
2)Membranes, particularly those present within mitochondria, are often highly folded. Suggest what advantages this folding provides (6 marks) - I don't know what to put for this question
3)explain the role of the components in a plasma membrane
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beyonder1111
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The folding of the inner membrane increases the surface area inside the organelle. Since many of the chemical reactions happen on the inner membrane, the increased surface area creates more space for reactions to occur.
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beyonder1111
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The principal components of the plasma membrane are lipids ( phospholipids and cholesterol), proteins, and carbohydrates. The plasma membrane protects intracellular components from the extracellular environment. The plasma membrane mediates cellular processes by regulating the materials that enter and exit the cell
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Rohan007best
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h


thnx

(Original post by beyonder1111)
The folding of the inner membrane increases the surface area inside the organelle. Since many of the chemical reactions happen on the inner membrane, the increased surface area creates more space for reactions to occur.
what would i need to include for all 6 marks
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macpatgh-Sheldon
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Hi,

In addition to stating large surface area, say obvious things - remember in A level biology exam, pretend that the examiner is a layman/woman:-

1. Much quicker exchange of materials
2. Give example e.g. folding of endothelial cell membrane of intestinal cells into microvilli, enables extremely fast absorption of glucose and amino acids produced by digestion (remember the mitochondrion is only one example in the Q.
3. On cristae of mitochondria folding allows greater number of stalked particles i.e. molecules of ATP synthase ----> faster oxidative phosphorylation.
4. More receptors

M (specialist biology tutor)
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