Microbiology:Bacterial Cells Ch 4 Ex 1

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FSCJ Dr. Davis Microbiology Test banks

Which of the following groups of organisms is not prokaryotic?

D) Eukarya

Which of the following is not a common bacterial shape?

C) disc

A small comma shaped bacteria is described as being a ________.

D) vibrio

Bacteria which show a wide variety of shapes within a single species are said to be

A) pleomorphic

Which of the following cellular structures are found only in prokaryotic cells?

B) pili

Extrachromosomal DNA in prokaryotic cells can be found in the form of

B) plasmids

Which of the following cellular structures can be found in both prokaryotic and eukaryotic cells?

D) ribosomes

Cocci arranged in random clusters of cells represent which of the following arrangements

B) staphylococci

Cocci shaped cells which divide along two planes will produce cells arranged into

C) tetrads

Prokaryotic cells divide by

B) binary fission

The function normally performed by mitochondria in eukaryotes is performed by ________ in prokaryotes.

B) cell membrane

The shape of a bacterial cell is determined (and maintained) by the

B) cell wall

The most important component of bacterial cell walls is

C) peptidoglycan

The outer (cell) membrane component of the cell wall of gram negative bacteria

C) contains lipopolysaccharide

Lipids would be found primarily in the cell wall of

D) acid-fast bacteria

The thinnest cell walls are found in ________ organisms.

A) Gram negative

Penicillin controls the growth of bacteria by

D) preventing peptidoglycan synthesis

Which bacterial genus normally lacks a cell wall?

C) Mycoplasma

The Fluid-mosaic model describes the structure of

B) cell membranes

Cell membranes are composed primarily of

C) phospholipids and proteins

The charged, phosphate end of a membrane phospholipid is

B) hydrophilic

Bacterial ribosomes

A) have a sedimentation rate of 70S

Genetic information in bacteria

D) is sometimes found in the form of plasmids

Endospores are typically found in the genera

B) Clostridium

Endospores are usually induced to form when

B) certain nutrients are depleted

Bacteria move by means of

B) flagella

Bacteria with flagella all over their surface are said to be

B) peritrichous

Some bacteria can transfer DNA to another cell using

A) conjugation pili

Eukaryotic cells add rigidity to their plasma membrane by including what component in the membrane

D) sterols

Which of the following cell structures could be found in both prokaryotic and eukaryotic cells?

A) ribosomes

Mitochondria

C) have a double membrane

Osmosis most directly involves

A) water moving down a concentration gradient

When the fluid within a cell has a higher concentration of dissolved substances than the fluid surrounding the cell, we say the fluid surrounding the cell is

D) hypotonic

A typical bacterial cell has a salt concentration of about 1%. If the cell is placed in a solution containing 10% salt, the net flow of water will be

A) out of the cell

T or F: Production of ATP occurs on the cell membrane of prokaryotic cells and in the lysosomes of eukaryotic cells.

False

T or F: The cell wall controls the movement of small molecules into and out of the cell.

False

T or F: Bacterial endospores are reproductive structures.

False

T or F: Bacteria with a single flagella at each end of the cell are said to be amphitrichous.

True

T or F: Bacteria move by whipping their flagella back and forth.

False

T or F: All bacteria produce capsules.

False

________ cells lack a nucleus and membrane bound organelles.

Prokaryotic

A spherical bacterium is known as a ________ .

coccus

ATP is produced in the ___________ of eukaryotic cells.

mitochondria

The ________ lies just outside the cell membrane in most bacteria and prevents the cell from lysing when fluids flow into the cell.

cell wall

A bacterial cell wall consists of several components, the most important of which is ________, a polymer of N-acetylglucosamine and N-acetylmuramic acid.

peptidoglycan

The depletion of certain nutrients from the environment can cause some bacteria to form a protective structure known as a/n ________ .

endospore

Water diffuses across a semi-permeable membrane during the process of ________ .

osmosis

The net flow of water will be out of a cell when a cell is placed in a ________ solution.

hypertonic

The bacterial cell wall is especially important when the cell is placed in a ________
solution because it prevents the cell from bursting.

hypotonic

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