Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

SCS BIO 2022 > BACTERIA > Flashcards

BACTERIA Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

What is the purpose of the flagella (flagellum)?

A

To aid movement of the bacteria.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is a chromosome? And what is the purpose?

A

A chromosome is a closed loop of DNA which controls the cells processes.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the purpose of the Cell membrane?

A

The cell membrane controls what enters and exits the cell.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What are Ribosomes?

A

Ribosomes are what make the proteins.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What does a Cell Wall do?

A

A Cell Wall gives rigidity and provides support to the bacteria.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is a Cytoplasm?

A

Cytoplasm is where the cell reactions occur/ take place.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Where does Bacteria feeding take place?

A

Bacteria feed by extra cellular digestion which takes place outside of the cell.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the FIRST step in Bacteria feeding?

A

The first step is to: Secrete enzymes onto food.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the SECOND step to Bacteria feeding?

A

The second step is: The released enzymes break down (digest) the food into smaller molecules.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the THIRD step in Bacteria feeding?

A

The third step is: Nutrients are reabsorbed into the bacteria (bacterium).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What are the ideal conditions for Bacteria feeding?

A

The ideal conditions for feeding and growth are warmth, moisture and plenty of food.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the process called to release the energy from food?

A

Respiration.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What are Autotrophs?

A

Bacteria that can make its own food.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What are Saprophytes?

A

Bacteria that feed on dead organic matter, and are decomposers.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the FIRST process of Binary Fission?

A

The chromosome/ DNA replicates.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

How does Bacteria reproduce?

A

Bacteria reproduces by Binary Fission (Cell division - Mitosis - Splitting into two).

17
Q

What is the SECOND process of Binary Fission?

A

Cell membrane pinches the cytoplasm in half (invaginates).

18
Q

What is the THIRD process of Binary Fission?

A

Bacterium (Bacteria) divides into two, each with a chromosome.

19
Q

How often can some bacteria reproduce?

A

Some can reproduce every 15- 20 minutes.

20
Q

What is the doubling of population called?

A

Exponential Growth.

21
Q

Why can’t exponential growth go on indefinitely?

A

The food is used up; Bacteria produce wastes or toxins that accumulate and reach a level where they interfere with or poison the bacteria; the bacteria can run out of room; or if anaerobic bacteria run out of oxygen.

22
Q

What do some bacteria form when unfavourable conditions arise?

A

Spores.

23
Q

What do the bacterial spores do?

A

They are resistant to low and high temperatures, change in PH levels, desiccation (drying out) and the effect of chemicals.

24
Q

What do bacteria spores do when conditions are favourabls?

A

They can grow into new bacteria cells.

25
Q

What is Bacteria?

A 
Bacteria is a prokaryote. 
It lacks a cell nucleus 
DNA/ RNA material is stored in a single loop in the nucleoid.
Has no membrane bound organelles
Reproduce asexually by binary fission
26
Q

What is a slime capsule?

A

It’s a capsule around the bacteria cell which is made of slime to protect it.

27
Q

When does binary fission happen?

A

It happens when one bacteria cell reaches its maximum size and when the environment conditions are ideal.

28
Q

What are some HARMFUL ANAEROBIC respiring bacteria?

A

Bad smelling discharge, dead tissue and gas formation within the tissue.

29
Q

What are some HELPFUL ANAEROBIC respiring bacteria?

A

Yoghurt production, waste processing and production of biogas.

30
Q

What are some HARMFUL AEROBIC respiring bacteria?

A

Food rotting (sour milk).

31
Q

What are some HELPFUL AEROBIC respiring bacteria?

A

Nitrogen fixing bacteria, cheese production and GE insulin production.

32
Q

What is a disease- causing bacterium called?

A

A Pathogen.

33
Q

What can bacteria excetion lead to in humans?

A

The toxins released by bacteria can lead to vomiting and diarrohea, or even death in humans.

34
Q

What are the Bacterial Conditions for Growth?

A 
Energy (food)
Moisture (enough water for metabolism)
Warmth
Oxygen (for Aerobic bacteria only, oxygen may kill anaerobic bacteria). 
pH level (slightly better on acidic).

SCS BIO 2022 (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions