P3

Question 1

What are bacteria regarded as due to the absence of a true nucleus?

Answer 1

Prokaryotic organisms

Bacteria have nucleic acids but lack a true nucleus, distinguishing them from eukaryotes.

Question 2

What does the term ‘prokaryote’ mean?

Answer 2

Coming before the nucleus

‘Pro’ means before and ‘karyote’ refers to the nucleus.

Question 3

What are the two types of autotrophic bacteria?

Answer 3

• Photosynthetic bacteria
• Chemosynthetic bacteria

Autotrophic bacteria can manufacture their own food.

Question 4

What do photosynthetic bacteria use to manufacture their own food?

Answer 4

Light energy

Question 5

What do chemosynthetic bacteria use to manufacture their own food?

Answer 5

Energy released from chemical processes

Question 6

What are the three types of heterotrophic bacteria?

Answer 6

• Parasitic bacteria
• Saprotrophic bacteria
• Mutualistic bacteria

Heterotrophic bacteria cannot manufacture their own food.

Question 7

What are parasitic bacteria that cause disease called?

Answer 7

Pathogenic bacteria

Question 8

What are parasitic bacteria that do not cause disease called?

Answer 8

Non-pathogenic bacteria

Question 9

What role do saprotrophic bacteria play in the ecosystem?

Answer 9

Decomposers and in the nitrogen cycle

Question 10

What is the function of mutualistic bacteria in their relationship with plants and animals?

Answer 10

Benefit both organisms

Question 11

Fill in the blank: Bacteria can be classified as _______ or heterotrophic.

Answer 11

Autotrophic

Question 12

True or False: All bacteria are multicellular organisms.

Answer 12

False

Question 13

What is the structure that allows bacteria to move called?

Answer 13

Flagellum

Question 14

What part of the bacterium contains nucleic acids?

Answer 14

Nucleoid

Question 15

What is the jelly-like substance within bacteria known as?

Answer 15

Cytoplasm

Question 16

What is the outer protective layer of bacteria called?

Answer 16

Cell wall

Question 17

Fill in the blank: Bacteria that are rod-shaped are referred to as _______.

Answer 17

Bacillus

Question 18

What is a vibrio shape of bacteria?

Answer 18

Curved or comma-shaped

Question 19

What is the primary function of ribosomes in bacteria?

Answer 19

Protein synthesis

Question 20

Fill in the blank: The _______ is a semi-permeable barrier surrounding the bacterium.

Answer 20

Cell membrane

Question 21

What is the primary characteristic that distinguishes prokaryotic organisms from eukaryotic organisms?

Answer 21

Lack of a true nucleus