Bacteria get their food in many ways. Photosynthetic bacteria make their own food from sunlight and carbon dioxide, just like plants. dioxide, just like plants. Other types of bacteria absorb food from the material they live on or in such as bacteria that break down dead organisms.

how do you think these bacteria obtain food and energy? These bacteria obtain food and energy by being autotrophic, using chemical energy, respiration, and breaking down its food or proteins can be in the food.

Bacteria require sources of carbon, nitrogen, phosphorous, iron and a large number of other molecules. Carbon, nitrogen, and water are used in the highest quantities. The nutritional requirements for bacteria can be grouped according to the carbon source and the energy source.

There are three ways for bacteria to transfer their DNA horizontally:

• Conjugation- Conjugation is the transfer of DNA directly from one cell to another through cell-cell contact.
• Transformation-
• Transduction-
• Conjugation is the transfer of circular DNA called plasmids through cell to cell contact.

The range of temperature from 4°C and 60°C (40°F and 140°F) is known as the danger zone , or the range at which most pathogenic bacteria will grow and multiply.

There are three ways that food can be contaminated:

• biological hazards (microorganisms) including bacteria, fungi, yeasts, mould and viruses.
• chemical hazards. including cleaning chemicals or foods with naturally occurring toxins, such as green potatoes.
• physical hazards.

In the US, norovirus is the most common cause of illness from contaminated food or water—but food isn’t the only way people can get norovirus. It also spreads easily from person-to-person. Symptoms usually start within 1 or 2 days of eating the contaminated food, but may begin in as few as 12 hours.