Lec5

Question 1

Lipids includes …and structure /functions

Answer 1

Lipids :
Fat. Energy storage. Glycerol *3 fatty acid= triacylglycerol
Saturated. And. Unsaturated

Phospholipid. Cell membrane
Amphipathic (hydrophobic and hydrophilic)

Question 2

Functions of cell membrane

Answer 2

I
Contain important proteins

Receive information
Flow of information
Cell structure

Question 3

Proteins ‘function

Answer 3

Enzyme activity
Transport
Intercellular jointing 
Cell cell recognition
Signal transduction 
Attachment to ECM

Question 4

What is fluid mosaic model

Answer 4

Fluids -phospholipid can transfer laterally

Mosaic-diverse protein
Integral protein and peripheral protein

Different cell different protein
Different membrane different protein

Question 5

How membrane transport

Answer 5

1 diffusion : high-low. No need energy or protein

2 active : low -high need energy need protein( carrier protein)

3 passive : high -low need protein( channel protein) no need energy

Question 6

Membrane can self sealing . How

Answer 6

1 phagocytosis solid particle or a cell. Food vacuole

2 pinocytosis. A sample of extra ellipse Fluid Vesicle

3 receptor-mediated endocytosis Specific impounded. Need receptors and ligands. Coated vesicles

Question 7

Carbohydrates includes …and structure / functions

Answer 7

Monosaccharide (glucose) and disaccharide(jointed by glucosidic linkage) –fuel for cellular process

Oligosaccharide and polysaccharide–structure and energy storage

Polysaccharide
Starch in plants. Cellulose
Glycogen. In animals. Chitin