cell structure of animal and plant cell Flashcards

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1
Q

describe structure and function of golgi apparatus

A

a stack of membrane flattened stacks; secretory vesicles bring materials to and from the Golgi. Site of protein modification (adding sugars to make glycoproteins), protein folding in enzyme/hormone.

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2
Q

describe structure and function of mitochondrion

A
  • inner membrane folded into cristae: provides large SA for electron carrier proteins in aerobic resp.
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3
Q

describe structure and function of vacuole

A
  • outer layer = tonoplast
  • contains cell sap = maintains cell stability to by exerting pressure on cell wall
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4
Q

describe structure and function of lysosomes

A
  • contains hydrolytic enzymes
    -digest dead organelles
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5
Q

describe structure and function of centrioles

A
  • made of tubulin
  • responsible for spindle fibre formation during cell division
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6
Q

describe structure and function of RER

A
  • covered in ribosomes
  • site of protein synthesis
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7
Q

describe structure and function of SER

A
  • NO ribosomes
  • site of cholesterol, lipid, hormone and steroid synthesis
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8
Q

describe structure and function of nuclear pore

A

allows the movement of MRna out of the nucleus

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9
Q

describe structure and function of nucleolus

A
  • contains RNA to synthesise ribosomes
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10
Q

3 different ways slides can be made for light microscopy

A
  • dry mounting
  • wet mounting
  • squash slides
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11
Q

define magnification

A

the number of times larger an image appears compared to its actual size

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12
Q

define resolution

A

the clarity of an image that shows fine ultrastructural detail clearly.

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13
Q

how is image formed in laser scanning

A

laser scans specimen point by point and stacks layers of image at different depths -> 3D

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14
Q

how is image formed for TEM

A

electrons pass straight through specimen (2D + black and white)

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15
Q

how is image formed for SEM

A

electrons bounce off specimen surface and focused (3D black and white, but false colour can be added)

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