4.4 Lipid Flashcards

1
Q

unsur dalam lipid

A

C, H, O (unsur hidrogen > oksigen)

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2
Q

jenis jenis lipid

A
  1. lemak
  2. lilin
  3. fosfolipid
  4. steroid
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3
Q

apa itu lemak

A

trigliserida
3 asid lemak + 1 gliserol = trigliserida + air

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4
Q

jenis lemak

A
  1. tepu
  2. tak tepu
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5
Q

apa itu lilin

A

1 alkohol + 1 asid lemak
kalis air

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6
Q

apa itu fosfolipid

A

1 alkohol + 2 asid lemak + 1 fosfat
struktur utama membran plasma

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7
Q

apa itu steroid

A

tiada asid lemak
kolesterol, hormon seperti estrogen, progesteron

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8
Q

apa kepentingan lipid

A

Lemak
- penebat haba
- simpanan tenaga bagi haiwan
- pelindung organ dalam badan manusia

Lilin
- lapisan kutikel yang melapisi epidermis daun
- sebum kulit manusia

Glikolipid
- stabilkan membran plasma
- pengesanan sel

Kolesterol
- hasilkan hormon steroid

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9
Q

persamaan lemak

A
  • mempunyai unsur yg sama
  • tak berkutub
  • mempunyai asid lemak dan gliserol
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10
Q

perbezaan lemak tepu dan tak tepu

A

lemak tepu
- ambil hidrogen tambahan
- bentuk ikatan tunggal antara C
- bentuk pepejal

lemak tak tepu
- tak ambil hidrogen tambahan
- bentuk ikatan ganda dua
- bentuk cecair

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