Chapter 3 Quiz (B)

A  the ability to focus above or below a stained specimen

B  the image that one sees when looking through the oculars

C  the ability to distinguish two small objects as separate

D  the distance between the end of the microscope objective lens and the specimen slide

A  the tryptic soy agar plate was contaminated prior to making the streak

B  they returned the flame loop to the broth between every sector/quadrant

C  the bacteria spread through each sector during incubation

D  they left the top of the Petri open too long during making the streak

A  prevent contaminating the second culture tube

B  clean the tube for use in the future

C  to seal the plastic lid on the tube

D  more than one of the above is correct

E  none of the above is correct

A  increases

B  decreases

C  stays the same

A  contain a cell wall composed of peptidoglycan

B  actively block water molecules from entering the cell

C  contain a cell wall composed of cellulose

D  are selectively permeable

A  monotrichous

B  lophotrichous

C  amphitrichous

D  peritrichous

A  it is a eukaryote

B  it contains some peptidoglycan

C  it contains mitochondria

D  it is gram positive

E  it is part of a multicellular microorganisms

A  allow the bacterium to survive extended periods without nutrients

B  help the bacterium to differentiate into faster growing stages of bacteria

C  allow the bacterium to make hundreds of “seeds” to spread on the wind

D  allow the bacterium to survive the absence of oxygen

A  membrane bound nucleus

B  ribosome

C  cell wall

D  plasma membrane

A  they are inherited from one generation to the next and they may carry genes that give their host a selective advantage

B  they can render bacteria drug-resistant

C  they are inherited from one generation to the next, they may carry genes that give their host a selective advantage, and they can render bacteria drug-resistant

D  they may carry genes that give their host a selective advantage

A  fimbriae

B  capsules

C  flagella

D  endospores

A  cause bacteria move through fluids

B  sense changes in nutrient concentration

C  are pathways for the secretion of exoenzymes

D  attach bacteria to various surfaces

A  DNA replication

B  phagocytosis

C  ATP production

D  protein synthesis

E  cell division

A  they help bacteria resist phagocytosis by macrophages

B  they are required for all bacteria to grow normally in culture

C  they consist of secreted material lying outside of the bacterial cell wall

D  they can prevent desiccation of bacteria cells