Exam 3: Cell Structure and Function

__________ reinforce and stiffen membranes in bacteria.

All of the following are true of supercoiling in chromosomal DNA EXCEPT:

Which of the following materials found in storage granules is used as an energy source?

Compare and contrast FtsZ and tubulin. Why do the similarities support evolution of prokaryotes and eukaryotes from a common ancestor?

__________ stabilize ribosomes during translation.

The capsule polysaccharides form a slippery mucous layer that inhibits:

All of the following are used by prokaryotic cells for attaching to solid surfaces EXCEPT:

__________ is impractical for proteins of a flexible nature.

Describe the Gram-negative cell envelope. Why are porins necessary in the outer membrane of Gram-negative cells?

Which of the following statements about the prokaryotic flagella is INCORRECT?

Which name refers to having flagella attached at one or both ends of the cell?

From your knowledge of Gram-positive and Gram-negative cell envelopes, why would penicillin be more effective in killing Gram-positive organisms than Gram-negative organisms?

Polyamines are __________ charged when the pH is near neutral.

A __________ is a term used to designate a single messenger RNA molecule being translated by multiple ribosomes.

Transport __________ mediate both active and passive transport.

Light is harvested by protein complexes called:

The partition that is a result of the inward growth of the cell envelope from opposite directions is known as the:

The thin layer of peptidoglycan in Gram-negative cells is believed, based on calculations of __________, to be one or two sheets.

Describe four ways cells can be broken open in order to isolate the cellular components.

Describe how and why magnetotactic bacteria might be used in wastewater management.