Exam lab Flashcards
compound microscope view is oriented
upside down and right to left
what happens to the brightness of the view when you go from 4x to 10x
it goes dimmer
which objective, high or low power, provides the greatest depth of field
low power
which magnifications require the most illumination for best clarity and contrast
the higher magnification
magnification compound microscope
high
magnification dissecting microscope
low
resolution compound microscope
high
resolution dissecting microscope
low
size of field of view compound microscope
low
size of field of view dissecting microscope
high
depth of field compound microscope
low
depth of field dissecting microscope
high
where are the pigments in these cyanobacteria
photosynthetic membranes called cyloyeds
are nuclei visible in cyanobacterial cells
no
which of these two genera has the most prominent mucilaginous sheath
gloeocapsa
how many cells are held within one sheath of gloeocapsa
multiples of 2
What shape are the chloroplasts? what is their function
circular, photosynthesis and capturing light energy
where are the chloroplasts located in the cell
toward the perimeter
can you see nuclei in Elodea cells
yes
why is the granular-appearing cytoplasm more apparent at the sides of the cell rather than in the middle
the vacuoles push the chloroplasts to the wall
are all cellular components moving in the same direction and rate during cytoplasmic streaming
yes
how do you explain the differences in the apparent shapes and positions of the nuclei in different cells
the vacuole pushes the nuclei to different places
what cellular structures of onion are more easily seen in stained as compared to unstained preparations
cell wall, nuclei, vacuoles, and mitochondria
do onion cells have chloroplasts
no the live underground
what can you conclude about the location of starch in storage cells of potato
located in amyloplasts
what are the functions of amyloplasts in potatoes
store starch
why are potatoes a good source or carbohydrates
they carry a lot of starch
does Amoeba have a cell wall
no they contain protists that break the cell for food
movement between amoeba and paramecium
paramecium move faster
how do the shape and body consistency differ between amoeba and paramecium
the shape of paramecium is long while amoeba is irregular shaped
what structures in amoeba and paramecium also occur in plant cells? what structures in amoeba and paramecium do not occur in plant cells?
Amoeba and paramecium and plant cells both have a nucleus and vacuole.
Is Spirogyra branched or unbranched
unbranched
What organelles visible in spirogyra are not visible in amoeba and paramecium
chloroplasts
for which molecules and ions does your experiment give evidence for passage through the semipermeable membrane
starch and iodine
What characteristic distinguishes those molecules and ions passing through the membrane from those that do not pass through the membrane
color change of bag and liquid
which temperature damaged membrane the most
70 degrees
which temperature damaged the membrane the least
-5 degrees
In general which is more damaging to membranes extreme heat or extreme cold
extreme heat, denature the proteins in the membrane
are lipids soluble in both acetone and methanol
yes
which damages membranes more 50% methanol or 25% acetone
50% methanol
In which solvent are lipids most soluble
acetone
why must aerobic organisms such as yourself inhale oxygen and exhale CO2
oxygen to accept electrons, CO2 to get rid of waste
advantages of anaerobic fermentation
relatively rapid, does not require oxygen
disadvantages of anaerobic fermentation
generates only 2 ATPS, produces lactic acid
Which compound is intermediate in respiratory pathway
pyruvate
Why did tube 6 produce CO2 even though an inhibitor of glycosides was present
because pyruvate was still present
did magnesium promote respiration
It didn’t because it didn’t really change that much
What gas is responsible for the holes in baked bread
CO2
What does a small number in pigment tell you about the characteristics of the moving molecules
the molecules are large and slow moving
Which are more soluble in the chromatography solvent, xanthophyll or chlorophyll a
xanthophyll, it is faster
what colors are diminished or absent
blue red violet green
was starch stored in the leaf
yes, you can see it on top of the leaf
would you expect leaves to be the primary organ for starch storage in plants
no, storage in the stem
how does the pattern of starch storage relate to the distribution of chlorophyll
starch is only present where photosynthesis is present
