Chapter 3 Quiz (B)

A  the ability to focus above or below a stained specimen

B  the ability to distinguish two small objects as separate

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

D  the image that one sees when looking through the oculars

A  the bacteria spread through each sector during incubation

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

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

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

A  prevent contaminating the second culture tube

B  to seal the plastic lid on the tube

C  clean the tube for use in the future

D  more than one of the above is correct

E  none of the above is correct

A  stays the same

B  decreases

C  increases

A  contain a cell wall composed of peptidoglycan

B  are selectively permeable

C  contain a cell wall composed of cellulose

D  actively block water molecules from entering the cell

A  amphitrichous

B  peritrichous

C  lophotrichous

D  monotrichous

A  it contains mitochondria

B  it is part of a multicellular microorganisms

C  it is a eukaryote

D  it contains some peptidoglycan

E  it is gram positive

A  allow the bacterium to survive extended periods without nutrients

B  allow the bacterium to survive the absence of oxygen

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

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

A  membrane bound nucleus

B  ribosome

C  plasma membrane

D  cell wall

A  they can render bacteria drug-resistant

B  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

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

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

A  endospores

B  flagella

C  fimbriae

D  capsules

A  sense changes in nutrient concentration

B  attach bacteria to various surfaces

C  cause bacteria move through fluids

D  are pathways for the secretion of exoenzymes

A  protein synthesis

B  ATP production

C  cell division

D  phagocytosis

E  DNA replication

A  they help bacteria resist phagocytosis by macrophages

B  they can prevent desiccation of bacteria cells

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

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