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Questions and Answers
Which of the following is a function of plasmid?
Which of the following is a function of plasmid?
- DNA replication (correct)
- Protein synthesis
- Cell wall synthesis
- None of the above
Mycoplasmas are bacterial cells that
Mycoplasmas are bacterial cells that
- Stain well with Gram's stain
- Fail to reproduce on artificial media
- Have a rigid cell wall
- Are resistant to penicillin (correct)
A bacterium containing a prophage is called
A bacterium containing a prophage is called
- Lytic
- Lysogen (correct)
- None of these
- Lylogen
The coating of a bacterium with antibody or complement that leads to enhanced phagocytosis of the bacterium by phagocytes is called
The coating of a bacterium with antibody or complement that leads to enhanced phagocytosis of the bacterium by phagocytes is called
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A gene involved in the synthesis of polypeptide is a
A gene involved in the synthesis of polypeptide is a
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Cycloserine is related to which amino acid in structure?
Cycloserine is related to which amino acid in structure?
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Which immunoglobulin is found in seromucous secretions?
Which immunoglobulin is found in seromucous secretions?
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Which growth characteristic matches a temperature range below 25°C?
Which growth characteristic matches a temperature range below 25°C?
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Study Notes
Functions of Plasmid
- Plasmid's functions include DNA replication
- Plasmid does not involve in protein synthesis or cell wall synthesis
Characteristics of Mycoplasmas
- Mycoplasmas are bacterial cells that lack a rigid cell wall
- They are resistant to penicillin
- They don't stain well with Gram's stain
Bacterium Containing Prophage
- A bacterium containing prophage is called a lysogen
Opsonisation
- Opsonisation is the process of coating a bacterium with antibody or complement that leads to enhanced phagocytosis of the bacterium by phagocytes
Bacterial Growth Characteristics
- Psychrotrophs: grow well between 0-4°C and multiply slowly at 0-4°C
- Mesophils: grow well between 25-45°C and may survive above 60°C
- Thermophils: grow well between 55-65°C
- Vegetable bacteria: grow below 25°C
Gene Types
- Structural gene: a gene that takes part in the synthesis of polypeptide
Immunoglobulins
- IgM: produced during the primary antigenic stimulus
- IgG: produced after the primary antigenic stimulus
- IgA: found in seromucous secretions
- IgE: found in plasma and serum
Cycloserine
- Cycloserine is related to the amino acid serine in structure
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