Why is it necessary to correct the readings from the peas with the readings from the beads? The beads served as a control variable, therefore,
the beads experienced no change in gas volume
. Explain the effects of germination (versus non-germination) on pea seed respiration.
What is the purpose of using the glass beads as a control?
We used glass beads as a control. The main purpose was
to see if there were any other factors affecting the experiment other than the variable being tested
. You just studied 6 terms!
What is the purpose of using just glass beads in a vial with no peas?
The vial with glass beads alone will
permit detection of any changes in volume due to atmospheric pressure changes or temperature changes
. As oxygen is used up by the respiring seeds, the gas pressure inside the respirometer will decrease and the water will flow into the pipet down its pressure gradient.
What is the purpose of KOH pellets in this experiment?
KOH is a
good absorbent
. KOH absorbs the carbon dioxide released by the germinating seeds and a partial vacuum is created because of the loss of carbon dioxide in the flask. This vacuum causes the water level in the delivery tube to rise up.
What was the purpose of making a respirometer with dormant peas and beads and a respirometer with just beads?
One respirometer will contain germinated seeds, one will contain a mix of nongerminating seeds and glass beads, and a third will contain only glass beads. The purpose of the beads is
to ensure that each respirometer is uniform in volume.
Why was it important to use the beads only reading as correction factors?
Why is it necessary to correct the readings from the peas with the readings from the beads? The gas changes in the beads were
only due to pressure and temperature
, and not gas consumption, so the beads act as a control. … Germinating peas consumed more oxygen than non-germinating.
Are non-germinating seeds dead?
Non-germinating seeds, however,
are dormant and use very little respiration
. Some respiration must occur in order for the seed to live. The rate of cellular respiration will be greater in germinating peas than in dry peas, and temperature will have a direct effect on this rate.
What are the purpose of using the beads?
The beads are traditionally used
to keep count while saying the prayer
.
Why do non-germinating peas consume less oxygen?
The non-germinating peas
shows hardly any consumption of oxygen
. Since the germinating peas are germinating or sprouting, they require a more extensive amount of energy or ATP. This allows them to have high oxygen consumption rates or respiration rates in this experiment.
Why do germinated seeds respire more?
As oxygen is consumed to provide energy, germinating seeds release carbon dioxide. This carbon dioxide is absorbed by potassium carbonate and thus the overall gaseous pressure of the respirometer will be reduced. … Additionally, that at
higher temperatures
, the rate of cellular respiration in the seeds will increase.
Which seeds are used in the experiment to show that carbon dioxide is given out during respiration?
Respiration is a biochemical process during which food (glucose) is oxidised to liberate energy. It is a catabolic process. In the experiment,
moist gram seeds
are taken as they are actively respiring and releasing CO2.
What is the purpose of adding KOH pellets in each tube?
The KOH pellets (potassium hydroxide pellets)
absorb the CO2
. How do you measure the metabolic rate? The over all importance of Cellular Respiration. In this process, oxygen and glucose are converted into carbon dioxide, water, and energy in the form of adenosine triphosphate (ATP).
Why was it important to include KOH in the test tube?
KOH absorbs carbon dioxide and forms Potassium Carbonate and water
. … Its volume will be reduced, because the carbon dioxide produced is being converted to a solid. The net result is a decrease in gas volume within the tube, and a related decrease in pressure in the tube.
Why does the procedure ask you to dispose of the pipette with each solution?
Why does the procedure ask you to dispose of the pipette with each solution? …
Reusing the pipette will contaminate the solutions due to residue remaining in them
.
Why did the vial have to be completely sealed?
The vial needed to be completely sealed around the stopper
because it insured that the measurement of the pressure in the test tube to be accurate
. If it hadn’t been tightly sealed, the air inside of the test tube would escape, causing the pressure of the oxygen to be impossible to be measured.
What gas is being used in the cellular respiration experiment?
Cellular respiration (see chemical reaction below) is a chemical reaction that occurs in your cells to create energy; when you are exercising your muscle cells are creating ATP to contract. Cellular respiration requires
oxygen
(which is breathed in) and creates carbon dioxide (which is breathed out).
