Proteins☘️ Flashcards

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1
Q

What is the function of membrane protein?

A

Acts as a adhesive(able to stick fast to surface)between cells
-providing space for up transport through the channel proteins including active transport,osmosis and facilitated diffusion

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2
Q

What is osmosis?

A

The diffusion of water molecules from a dilute solution to a more concentrated solution across partially permeable membrane

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3
Q

What is diffusion?

A

The movement of molecules from a higher concentration to a lower concentration area without the use of energy.

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4
Q

What is active transport?

A

The movement of molecule and ions through a cell membrane from a region of low concentration to high concentration using energy from respiration.

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5
Q

Tell me about the name of the protein on the membrane?

A

Intrinsic (in)
Extrinsic (out)
Intrinsic channel protein
Interegal protein:important to structure
-glycoprotein(glycarbon chain added to protein) it is a carbohydrate chain
-glycolipids: glycoprotein added to phospholipids

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6
Q

Tell me about the type of carrier proteins?

A

-Carrier protein(passive) water soluble are allowed through
-gated channel protein(let ions enter only if conditions are meet)
-channel protein allows ions through
-carrier protein(active) allow water soluble thought but requires energy (can move against conc gradient)

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7
Q

What is chloresterol role In cell membrane?

A

-Add strength to cell membrane
-binds to tail of phospholipids and restrict movement
-hydrophobic prevent water and dissolved ion loss from cell
-ensure that the fluidity of the membrane is reduced at high temperatures

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8
Q

How are cell surface proteins arranged and explain protein in deepth ?

A

Randomly arranged in cell membrane compared to phospholipids embedded in 2 main ways
I-ntrinsic protein
Completely span in the bilayer from 1 side to the other some acts as a carrier proteins and membrane bound enzymes (provide temporary binding site)
-glycoprotein:work in conjunction with extrinsic protein act as a recognition site for molecule like hormones.
-extrinsic protein:occurs on either surface of bilayer or partially embedded and don’t span the whole bilayer
Provide mechanical support or can act as receptors

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9
Q

What is glycoprotein consist of and act as?

A

Consist of carbohydrates attached to extrinsic protein
Act as a site of recognition (aimed at lymphocytes to recognise cell as self and not foreign)

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10
Q

What is glycolipid and consist of?location and function?

A

-Consist of carbohydrate covalently bonded with lipid
-located externally in watery environment out of the cell
-function as a cell surface
receptor for specific chemicals

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11
Q

What substances can diffuse freely through the membrane?

A

Oxygen, carbon dioxide, small uncharged molecules, water, fat soluble molecules

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12
Q

What is a molecule and ion and atom?

A

Atom:is a particle of matter that uniquely defines as a chemical element

Molecule:is a group of 2 or more atoms held together by attractive forces

Ions:any atom or group of atom that bears 1 or more positive or negative charges

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