
Bakteri
Presentation
•
Biology
•
1st Grade
•
Hard
Fitrah Salim
Used 2+ times
FREE Resource
6 Slides • 2 Questions
1
By Fitrah Salim
2
Archaebacteria
a. susunan tubuh sangat sederhana
b. habitat pada lingkungan ekstrim
c. prokariotik uniseluler
d. dinding sel tidak mengandung peptidoglikan
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3
Eubacteria
a. prokariotik, uniseluler
b. ditemukan di berbagai habitat
c. memiliki dinding sel yang terdiri atas peptidoglikan
d. mampu membentuk endospora
e. reproduksi secara seksual dan aseksual
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4
Pewarnaan Gram Bakteri
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5
BAKTERI GRAM POSITIF
- memberikan warna ungu saat pengecetan gram.
- memiliki dinding sel yang lebih sederhana tetapi lebih tebal dari dinding sel bakteri gram negatif
- kandungan peptidoglikan dinding selnya lebih banyak daripada lipid
contoh:
Bacillus subtilis: meningitis (peradangan pd selaput otak)B
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6
BAKTERI GRAM NEGATIF
- memberikan warna merah
- kandungan peptidoglikan lebih sedikit
- mempunyai membran sitoplasma
- kandungan lipid lebih banyak daripada peptidoglikan
- multilayer / berlapis 3membran bagian luar (outer membrane)
lapisan murein
membran plasma dalam
Contoh:
Vibrio cholerae: kolera merupakan penyakit yang menular melalui makanan atau minuman yang terkontaminasi bakteri.
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7
Multiple Choice
Pernyataan yang benar tentang dinding sel bakteri adalah
bakteri gram negatif menyerap warna ungu
lapisan terluar dari dinding sel bakteri gram negatif adalah lendir
bakteri gram positif dalam suasana asam berwarna merah
bakteri gram positif memiliki sedikit lipoposakarida
dinding sel bakteri tersusun atas peptidoglikan
8
Fill in the Blanks
Antibiotik sukar menembus sel bakteri Mycobacterium sp. karena lapisan lipid pada dinding sel memiliki komponen
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By Fitrah Salim
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