What are the two stages of bacteria?
The life-cycle of bacteria consists of two distinct phases. These are the active stage and the inactive, or spore-forming stage. In the active stage, bacteria grow and reproduce. Bacteria multiply best in warm, dark, damp, or dirty places where food is available.
What is a bacteria life cycle?
The bacteria life cycle consists of the lag phase, the log or exponential phase, the stationary phase and the death phase. Factors that influence bacterial growth bear heavily on this cycle.
What is the process of bacteria?
Bacteria reproduce primarily by binary fission, an asexual process whereby a single cell divides into two. Under ideal conditions some bacterial species may divide every 10–15 minutes—a doubling of the population at these time intervals.
What is bacterial structure?
Bacteria are prokaryotes, lacking well-defined nuclei and membrane-bound organelles, and with chromosomes composed of a single closed DNA circle. They come in many shapes and sizes, from minute spheres, cylinders and spiral threads, to flagellated rods, and filamentous chains.
What are the 3 categories of bacteria?
Summary. There are three basic shapes of bacteria: coccus, bacillus, and spiral.
What are the 5 groups of bacteria?
Bacteria are classified into five groups according to their basic shapes: spherical (cocci), rod (bacilli), spiral (spirilla), comma (vibrios) or corkscrew (spirochaetes). They can exist as single cells, in pairs, chains or clusters. Bacteria are found in every habitat on Earth: soil, rock, oceans and even arctic snow.
What are the 6 conditions for bacterial growth?
FATTOM is an acronym used to describe the conditions necessary for bacterial growth: Food, acidity, time, temperature, oxygen, and moisture. Foods provide a perfect environment for bacterial growth, due to their provision of nutrients, energy, and other components needed by the bacteria.
What are 5 things bacteria need to survive?
What Are the 6 Things Bacteria Need to Grow?
- Ideal temperatures.
- Oxygen (or lack of)
- Nutrient source.
- Space to grow.
What are the phases of bacterial growth curve?
The bacterial growth curve represents the number of live cells in a bacterial population over a period of time.
What is the growth phase of bacteria?
The following points highlight the four main phases of growth in bacteria. The phases are: 1. Lag Phase 2. Log or Exponential Growth Phase 3. Stationary Phase 4. Death or Decline Phase. 1. Lag Phase: Lag phase represents a period of active growth during which bacteria prepare for reproduction, synthesizing DNA, various inducible enzymes, and other macromolecules needed for cell division.
What conditions encourage bacteria to grow?
– Mouthwash. Swab your teeth and gums and see how well toothpaste or mouthwash work against the plaque-causing bacteria on your teeth. – Dog’s mouth: Have you heard people say that dogs’ mouths are cleaner than humans’? Design an experiment to test whether this is really true! – Band-aid. – Water bottle. – Shoes. – Toothbrush. – Makeup.
What is the lag phase of bacterial growth?
– The Lag phase. The lag phase is also known as the adaptation period, during this phase the bacterial cells start to adjust to their new conditions. – Exponential or Log phase. – Stationary Phase. – Death or Decline phase.