PRE LAB 2 BOB TAIL SQUID AND V. FISCHERI

Question 1

Microbe responsible for the light production of bobtail squid is

Answer 1

Vibrio fischeri

Question 2

How does the bobtail squid benefit from the V. fischeri?

Answer 2

The bioluminescence causes camouflage as it countershade the moonlight making the squid invisible to predators

Question 3

How does V. fischeri benefits from the squid?

Answer 3

The host serves as a source of nutrients for reproduction

Question 4

Bioluminescene is a process that is __________

Answer 4

density-dependent behaviour
low cell density = no bioluminescence
high cell density = bioluminescene

Question 5

this density dependent behaviour is also termed as

Answer 5

quorum sensing

Question 6

what is quorum sensing

Answer 6

detect or respond to cell population density by gene regulation

Question 7

quorum sensing is a type of _____

Answer 7

paracrine signaling

Question 8

when signals and receptors bind ___________ happen

Answer 8

transcription, translation and action happen

Question 9

What is paracrine signaling?

Answer 9

secretion of mediators by one cell that acts on other cells in its immediate vicinity

Question 10

What is autocrine signaling?

Answer 10

production and secrtion of extracellular mediator by a cell followed by the binding of that mediator to receptors on the same cell to initiate signal transduction.

Question 11

population density of V. fischeri at different time of the day

Answer 11

day time - low cell density, no bioluminescene

night time - high cell density; bioluminescence occur

Question 12

High cell density of bacteria initiates the _____

Answer 12

gene expression for the production of protein responsible for the bioluminescence

Question 13

bacterial signaling is named

Answer 13

quorum sensing