Definition Of Bacteria

Hii Buddy , I Want To Know What Is Bacteria ? Also Provide Me Definition & Types Of Bacteria ?

[Shaleen]

Bacteria Are Microscopic Living Organisms, Usually One-Celled, That Can Be Found Everywhere.

They Can Be Dangerous, Such As When They Cause Infection, Or Beneficial, As In The Process Of Fermentation (Such As In Wine) And That Of Decomposition


Anatomy Of A Typical Bacterium :

Capsule: A Protective, Often Slimy, Coating, Often Of Sugars, That Helps To Protect The Bacterium. It Also Makes Bacteria Virulent. This Means The Bacteria Is More Likely To Cause Disease, Since It Aids The Cell In Survival Against Attack. For Example, The Bacteria May Survive An Attack From The Human Body's Immune System.

2. Cell Wall: In Bacteria, The Cell Wall Is Usually Made Of Peptidoglycan, A Protein And Sugar Compound. This Structure Gives The Cell Some Rigidity And Protection.

3. Cell Membrane: As In Most Cells, The Bacterium's Plasma Membrane Acts By Coordinating The Passage Of Molecules Into And Out Of The Cell.

4. Cytoplasm: Again, As In Many Cells, The Cytoplasm Serves As A Medium Through Which Molecules Are Transported, As Well As A System To Maintain Conditions (Like Temperature And Ph) That Are Best For The Cell.

5. Ribosomes: The Main Site For The Bacterium's Protein Synthesis.

6. Number Six Is A 'Nucleosome.' This Term Won't Be Discussed In This Lesson.

7. Nucleoid: This Is The Region Where The Bacterium's Dna Is Located. Again, It's Not The Same As A Nucleus Because It's Not Surrounded By A Membrane.

8. Flagellum: In Many Bacteria, A Flagellum Is Present, And Is The Means By Which The Cell Moves Around.