Bacteria

Question 1

We use……to make our dough

Answer 1

Yeast

Question 2

Yeast belongs to……kingdom

Answer 2

Fungi

Question 3

To make yoghurt we use the……from bacteria

Answer 3

Anzymes

Question 4

All kinds of micro-organisms are……

Answer 4

1)useful
2)harmful

Question 5

The sugar in beet fruit change into lactic acid by using……

Answer 5

Bacteria

Question 6

Compare between bacteria cells and yeast cells??

Answer 6

1)the yeast cells are bigger than the bacteria cells
2)bacteria cells can grow faster than yeast cells

Question 7

Fermentation

Answer 7

Anaerobic respiration occurring in microorganisms

Question 8

Fermenting sugar beet juice (by yeast cells), it gives

Answer 8

Ethanol(alcohol)

Question 9

Fermenting sugar beer juice by anaerobic lactic acid bacteria it gives

Answer 9

Lactic acid(very sour substance)

Question 10

What sort of respiration occurs in the bacteria used to make yoghurt??

Answer 10

Anaerobic respiration bacteria

Question 11

What substance does this produce??

Answer 11

Lactic acid

Question 12

What are the effects of this substance on milk??

Answer 12

Unsweetened yoghurt tastes sour and thickness

Question 13

What are the conditions that bacteria need to grow and reproduce??

Answer 13

1)nutrients(sugar):use them for respiration and making substances for growth and reproduction
2)warmth:the enzymes makes substances work faster,so bacteria grow faster in warm places
3)moisture:stops the cells from drying out

Question 14

The features of bacteria??

Answer 14

1)some kinds of them use to make many useful products
2)there are many different species of bacteria(they have different shapes and sizes)
3)bacteria are prokaryotes kingdom
4)they don’t have nuclei (they have a circular chromosome to control a cell)
5)they can reproduce by binary fission(asexual reproduction) may this reproduction causes food poisoning

Question 15

The bacteria that looks like circle??

Answer 15

This bacterium causes sore throats,they cannot swim

Question 16

Bacteria in reproduction structures??

Answer 16

By binary fission:they can grow from one cell and then split evenly into to identical cells

Question 17

What does the bacteria causes??

Answer 17

It causes cholera disease(diarrhoea and vomiting) it kills people

Question 18

The flagella??

Answer 18

1)bacteria swims using flagella
2)each flagellum spins to move a cell forward
3)it observes pictures in micro lab

Question 19

How can we make the yoghurt??

Answer 19

1)Milk——boiling to 90 degrees——pasteurized milk
2)warm milk——bacteria enzymes incubate 43 degrees——chill(sour and thickness yoghurt)