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Flashcards in Biotechnology Deck (33)
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1

What is a microbe?

2

What are the 4 main types of microbes?

3

Which is bigger and by what factor..

 

Bacteria or Viruses

Bacteria are about 100 times bigger than viruses

4

What are the 3 basic shapes of bacteria?

5

True or False

 

Most bacteria found in the human body are either harmless or are in fact helpful

True

 

Only around 15% of bacteria are harmful but some can cause serious problems

6

How do bacteria reproduce?

By binary fission. Each bacteria can reproduce every 20 minutes

7

What is needed for microbes to grow?

8

What is the structure of a virus?

9

True or false

 

Viruses do not contain cells

True

 

and for this reason some people don't consider them to be living

10

How do funghi reproduce (replicate)?

By budding

By producing spores

11

How do viruses reproduce (replicate)?

By invading cells and tricking them into replicating new copies of the virus

12

What is a pathogen?

 A microbe that causes infectious disease

13

What are some common illnesses caused by viruses?

14

What are some common illnesses caused by bacteria?

15

How do pathogens enter the body?

16

How do pathogens enter the body?

17

How are pathogens spread?

18

How are pathogens spread (2)

19

How are pathogens spread (3)

20

Preventing the spread of disease

21

Which 2 diseases were involved in the first vaccine?

Smallpox and Cowpox

22

Which animal was used to creat the name "Vaccine"? 

Cow

23

Which processes do vaccines interfere with in bacteria?

1. Metabolism

2. DNA replication

3. Protein synthesis

24

How do vaccines work?

A weakened version of the virus is used to stimulate the body to produce antibodies which are ready to use when real virus enters

25

What is herd immunity?

The idea that if enough people are vaccinated then a disease cannot be spread to those who are not vaccinated

26

What 2 ways do antibiotics work on bacteria?

1. they kill the bacteria by destroying the cell wall

2. They interfere with some of ther processes the bacteria needs to survive

27

Why don't antibiotics kill viruses?

Because viruses don't have a cell wall

28

29

Why does food "go off"?

Growth of microbes on food

30

How can we preserve food?

High temp (UHT)

Low temp (Freezing)

Chemicals (Salt or Vinegar)

Atmosphere (Vacuum packing)

Bottling or Canning

Moisture removal (drying)