BIOL 2100 Exam 3 Exam with complete
solutions latest version.pdf, Exams of Biology
quorum sensing - ANSWERallows bacterial populations to coordinate the
behavior of all cells in a population in activities that require a given density of
cells at the same time
example of quorum sensing - ANSWERbiofilm
an aggregation of bacterial cells attached to a surface by molecules secreted
by the cells, but only after the cells have reached a certain density
2 types of mating yeast - ANSWER"a" and "α" (alpha)
How do yeast reproduce? - ANSWERWhen exposed to each others mating
factors, a pair of cells of opposite type change shape, grow toward each
other, and fuse/mate
The new cell contains all the genes of both original cells, providing
advantages to the cell's descendants
3 steps of cell signaling - ANSWERreception
transduction
response
, gap junctions - ANSWERPoints that provide cytoplasmic channels from one
cell to another with special membrane proteins. Also called communicating
junctions.
4 types of signaling - ANSWERendocrine, paracrine, autocrine, juxtacrine
animals have ____ junctions while plants have ______. - ANSWERanimals
have gap junctions
plants have plasmodesmata
paracrine signaling - ANSWERsecreted molecules diffuse locally and trigger a
response in neighboring cells
example of paracrine signaling - ANSWERgrowth factors, neurotransmitters
(synaptic signaling)
endocrine signaling - ANSWERsecreted molecules diffuse into the
bloodstream and trigger responses in target cells (that have the specific
receptor) anywhere in the body
synaptic signaling - ANSWERElectrical signal along a nerve cell triggers the
secretion of neurotransmitter molecules; these molecules act as chemical
signals, diffusing across the synapse (the narrow space between the nerve
cell and its target cell) triggering a response in the target cell
What do drugs that treat anxiety, depression, etc. do? - ANSWERDisrupt the
synaptic signaling pathway
solutions latest version.pdf, Exams of Biology
quorum sensing - ANSWERallows bacterial populations to coordinate the
behavior of all cells in a population in activities that require a given density of
cells at the same time
example of quorum sensing - ANSWERbiofilm
an aggregation of bacterial cells attached to a surface by molecules secreted
by the cells, but only after the cells have reached a certain density
2 types of mating yeast - ANSWER"a" and "α" (alpha)
How do yeast reproduce? - ANSWERWhen exposed to each others mating
factors, a pair of cells of opposite type change shape, grow toward each
other, and fuse/mate
The new cell contains all the genes of both original cells, providing
advantages to the cell's descendants
3 steps of cell signaling - ANSWERreception
transduction
response
, gap junctions - ANSWERPoints that provide cytoplasmic channels from one
cell to another with special membrane proteins. Also called communicating
junctions.
4 types of signaling - ANSWERendocrine, paracrine, autocrine, juxtacrine
animals have ____ junctions while plants have ______. - ANSWERanimals
have gap junctions
plants have plasmodesmata
paracrine signaling - ANSWERsecreted molecules diffuse locally and trigger a
response in neighboring cells
example of paracrine signaling - ANSWERgrowth factors, neurotransmitters
(synaptic signaling)
endocrine signaling - ANSWERsecreted molecules diffuse into the
bloodstream and trigger responses in target cells (that have the specific
receptor) anywhere in the body
synaptic signaling - ANSWERElectrical signal along a nerve cell triggers the
secretion of neurotransmitter molecules; these molecules act as chemical
signals, diffusing across the synapse (the narrow space between the nerve
cell and its target cell) triggering a response in the target cell
What do drugs that treat anxiety, depression, etc. do? - ANSWERDisrupt the
synaptic signaling pathway
