Posts Tagged ‘Biology’

Cell Membranes & Transportation – සෛල පටල හරහා පරිවහනය සිදුවන ආකාර

In cellular biology, membrane transport refers to the collection of mechanisms that regulate the passage of solutes such as ions and small molecules through biological membranes, which are lipid bilayers that contain proteins embedded in them. The regulation of passage through the membrane is due to selective membrane permeability – a characteristic of biological membranes which allows them to separate substances of distinct chemical nature. In other words, they can be permeable to certain substances but not to others.

Transport types
-Passive diffusion
-Active and co-transport
Secondary active transporter proteins
-Pumps
Membrane selectivity
-Electrolyte selectivity
-Non-electrolyte selectivity

This video will introduce you about all kinds of transportation techniques via cell membranes. This video clearly explains, make it simple to understand.

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Ananda Vidyalaya Colombo 10 – 2012 – Grade 12 Final – Physics – MCQ

Use these previous exam papers to revise and prepare for the upcoming Advanced Level exams. This way you can find out what you already know and what you don’t know.
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Royal College-2013-Last Term-Biology-English Medium-With Answers-Grade-13

Use these previous exam papers to revise and prepare for the upcoming Advanced Level exams. This way you can find out what you already know and what you don’t know.
To Download “Royal College-2013-Last Term-Biology-English Medium-With Answers-Grade-13” Right Click > “Save Target as”

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Richmond College, Galle – Last Term Test 2012 – Biology – Structured Essay

Use these previous exam papers to revise and prepare for the upcoming Advanced Level exams. This way you can find out what you already know and what you don’t know.
To Download “Richmond College, Galle – Last Term Test 2012 – Biology – Structured Essay” Right Click > “Save Target as”

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Ananda Vidyalaya Colombo 10 – 2012 – Grade 13 Final – Biology – SE

Biology Model Paper created by Ananda Vidyalaya Colombo 10 for Grade 13 Students’ Final Term Test Exam(2012). You can download structured essay paper from following download link. Please share this content with your friends.

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