Podcast
Questions and Answers
Reproduction is the process of how organisms make more of ______.
Reproduction is the process of how organisms make more of ______.
themselves
Reproduction can happen by ______ reproduction, or asexual reproduction.
Reproduction can happen by ______ reproduction, or asexual reproduction.
sexual
Bacteria reproduce by binary ______.
Bacteria reproduce by binary ______.
fission
When bacteria have ideal conditions, some bacteria can reproduce in as little as ______ minutes.
When bacteria have ideal conditions, some bacteria can reproduce in as little as ______ minutes.
One bacterium can become ______ bacteria.
One bacterium can become ______ bacteria.
Cyanobacteria are photosynthetic bacteria forming blue-green ______.
Cyanobacteria are photosynthetic bacteria forming blue-green ______.
Cyanobacteria are primarily found in soil, fresh water, and ______ water.
Cyanobacteria are primarily found in soil, fresh water, and ______ water.
Cyanobacteria produce a major share of ______ present in the atmosphere.
Cyanobacteria produce a major share of ______ present in the atmosphere.
Some species of cyanobacteria co-exist with fungi to form an ecological system called ______.
Some species of cyanobacteria co-exist with fungi to form an ecological system called ______.
Blue-green algae are the most primitive organisms in the plant ______.
Blue-green algae are the most primitive organisms in the plant ______.
The cell wall in blue-green algae may have 2-3 ______.
The cell wall in blue-green algae may have 2-3 ______.
The inner layer of the cell wall of cyanobacteria lies between the outer layer and the ______.
The inner layer of the cell wall of cyanobacteria lies between the outer layer and the ______.
The cell wall is formed of polysaccharide and ______.
The cell wall is formed of polysaccharide and ______.
The plasma membrane is composed of lympholipid and ______.
The plasma membrane is composed of lympholipid and ______.
Plasma membranes are selectively ______ membranes.
Plasma membranes are selectively ______ membranes.
In a perfectly competitive market, the firm is a price taker and the ______ is a price maker.
In a perfectly competitive market, the firm is a price taker and the ______ is a price maker.
Axore bacteria fixes atmospheric ______ in the soil for fixing.
Axore bacteria fixes atmospheric ______ in the soil for fixing.
Lactobacillus helps to ferment lactose (glucose) to ______.
Lactobacillus helps to ferment lactose (glucose) to ______.
In a perfectly competitive market, there is free entry and ______ of firms.
In a perfectly competitive market, there is free entry and ______ of firms.
Bacteria that cause disease are commonly called ______ bacteria.
Bacteria that cause disease are commonly called ______ bacteria.
The industry is faced with a ______ demand curve.
The industry is faced with a ______ demand curve.
Bacteria that do not cause any form of disease when they are in the right site or location are considered ______.
Bacteria that do not cause any form of disease when they are in the right site or location are considered ______.
Streptomyces is used to produce ______ used in the treatment of infectious diseases.
Streptomyces is used to produce ______ used in the treatment of infectious diseases.
Vibrio cholerae is one of the bacteria that causes ______.
Vibrio cholerae is one of the bacteria that causes ______.
This means that all buyers and sellers have access to all ______ information.
This means that all buyers and sellers have access to all ______ information.
Methanogenic bacteria is used in ______ treatment.
Methanogenic bacteria is used in ______ treatment.
Bacteria that helps in the production of antibiotics used to treat infectious diseases is called ______.
Bacteria that helps in the production of antibiotics used to treat infectious diseases is called ______.
Mycobacterium tuberculosis causes ______.
Mycobacterium tuberculosis causes ______.
The slope is ______, meaning it can sell any quantity for the same price.
The slope is ______, meaning it can sell any quantity for the same price.
Clostridium tetani causes ______.
Clostridium tetani causes ______.
This ensures that there is no room for ______ or monopolies.
This ensures that there is no room for ______ or monopolies.
Rod-shaped bacteria can be numerous (e.g. ______)
Rod-shaped bacteria can be numerous (e.g. ______)
______-shaped bacteria are referred to as Vibrio.
______-shaped bacteria are referred to as Vibrio.
The cell wall of bacteria is made of complex ______.
The cell wall of bacteria is made of complex ______.
All prokaryotic organisms have a ______ wall.
All prokaryotic organisms have a ______ wall.
The plasma membrane is present below the cell ______.
The plasma membrane is present below the cell ______.
Bacteria are regarded as ______ organisms that have the capacity to survive on various environments or ecological habitats.
Bacteria are regarded as ______ organisms that have the capacity to survive on various environments or ecological habitats.
Bacteria are usually surrounded by two protective coverings: the outer cell wall and inner cell ______.
Bacteria are usually surrounded by two protective coverings: the outer cell wall and inner cell ______.
The majority of the bacteria are ______.
The majority of the bacteria are ______.
They exhibit both autotrophic and ______ modes of nutrition.
They exhibit both autotrophic and ______ modes of nutrition.
Autotrophic bacteria are the ones that derive nutrition from the ______ substances, and they take in carbon and hydrogen.
Autotrophic bacteria are the ones that derive nutrition from the ______ substances, and they take in carbon and hydrogen.
The mucilaginous layer gives protection against the injurious factors of the ______.
The mucilaginous layer gives protection against the injurious factors of the ______.
Lamellus contains pigments such as ______, carotenoids, and xanthophyll.
Lamellus contains pigments such as ______, carotenoids, and xanthophyll.
The mucilaginous layer is the ______ covering of the eukaryotic cell.
The mucilaginous layer is the ______ covering of the eukaryotic cell.
Sunlight is an important factor for ______ cells.
Sunlight is an important factor for ______ cells.
The nucleolus is centrally located in the cytoplasm and stores a ______ structure.
The nucleolus is centrally located in the cytoplasm and stores a ______ structure.
Study Notes
Characteristics of Bacteria
- Bacteria are microscopic organisms that can survive in various environments or ecological habitats.
- They are typically prokaryotes and can live in complex and stressful environments.
- They have two protective coverings: the outer cell wall and inner cell membrane.
- Most bacteria are unicellular and can exhibit both autotrophic and heterotrophic modes of nutrition.
Morphology of Bacteria
- Bacteria can have different shapes, including:
- Rod-shaped (e.g., Bacillus)
- Comma-shaped (e.g., Vibrio)
- Spiral
Structure of Bacteria Cell
- The cell membrane is made of complex peptidoglycan and covers the cell membrane.
- The cell wall is present in all prokaryotic organisms (bacteria) and:
- Protects and gives shape to the cell
- Is composed of peptidoglycan, lipopolysaccharides, and some proteins
- The plasma membrane is present below the cell wall and is present in both prokaryotic and eukaryotic cells.
Reproduction
- Bacteria reproduce by binary fission.
- Under ideal conditions, some bacteria can reproduce in as little as 20 minutes.
- One bacterium can become two bacteria.
Beneficial and Harmful Aspects of Bacteria
- Bacteria are divided into numerous groups, including:
- Pathogenic bacteria (cause disease)
- Non-pathogenic bacteria (do not cause disease)
- Examples of diseases caused by bacteria include:
- Cholera (Vibrio cholerae)
- Salmonella typha
- Tetanus (Clostridium tetani)
- Tuberculosis (Mycobacterium tuberculosis)
Specific Types of Bacteria
- Azore bacteria: fix atmospheric nitrogen in soil
- Lactobacillus: ferment lactose to lactic acid
- Streptomyces: produce streptomycin (antibiotics) for treatment of infectious diseases
- Methanogenic bacteria: used in sewage treatment
Cyanobacteria (Blue-Green Algae)
- These are photosynthetic bacteria that form blue-green algae.
- They are found in soil, fresh water, and salty water.
- They are unicellular and important in the food chain.
- They produce a major share of oxygen in the atmosphere and serve as food for fish.
Structure of Cyanobacteria (Blue-Green Algae)
- The cell wall has 2-3 layers and is composed of polysaccharide and mucopeptide.
- The plasma membrane is selective and permeable.
- The mucilaginous layer provides protection to the protoplasm cells against environmental factors.
- The cytoplasm contains structures such as lamellae, which contain pigments (chlorophyll, carotenoids, xanthophyll).
- The nucleoplasm contains a nucleolus or maternal structure that stores a fibrillar structure.
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Description
Learn about the shape and structure of bacteria cells, including cell membrane and cell wall composition and functions.
