MCQ - 225

The basic taxonomic unit in microbiology:

• genus

• family

• Species

• order

• class

A distinctive feature of a prokaryotic cell:

• with nuclear substance (nucleoid)

• reproduces by meiosis

• has a nucleus

• has mitochondria

• ribosome size is 80S

How long do bacterial spores live in the environment?

• several years

• a few minutes

• a few hours

• several days

• several weeks

Bacterial organelles involved in adhesion and conjugation processes:

• capsule

• Pili

• flagella

• spores

• mesosome

Ribosomes are:

• cytoplasmic membrane derivative

• supply of nutrients

• to save the species

• protein synthesis center

• protects the cell from adverse external influences

Functions of flagella:

• provides movement

• gives bacteria a certain shape

• protects the cell from adverse external influences

• transports solutes into the cell

• is involved in cell division

Cocci are arranged in chains:

• micrococci

• Streptococci

• sarina

Importance of bacterial spore formation:

• ability to reproduce

• participates in nutrition

• the ability to move

• ability to survive in the environment

• the ability to protect the human body

Cocci are arranged like grapes:

• sarcins

• streptococci

• Staphylococci

• bacillus

• micrococci

Chlamydia and rickettsia are different from other bacteria:

• they cannot breed in an oxygen environment

• forms spores under unfavorable conditions

• does not cause infectious disease in humans

• are intracellular parasites

• has no cell wall