Online Cell Respiration Lab

Question 1

Know the Purpose and general procedure for the Online Cell Respiration Lab: Germinating v. Non-germinating Peas at Room and Cold Temperatures

Answer 1

measuring cell respiration through oxygen consumption

Question 2

Set up of respirometer

Answer 2

Has a pipet and glass tub
measures the pressure change due to consumption of oxygen

Question 3

Purpose of glass beads

Answer 3

It is the control group to account for fluctuating temperatures

Question 4

Purpose of KOH

Answer 4

convert CO2 into solid so only oxygen can be measured through volume

Question 5

Relationship of water movement through pipette and O2 consumption (why does water flow into the pipette?)

Answer 5

Volume and pressure is low in the glass part of the respirometer so the water will push the oxygen bubble ot go in that direction because the volume of air in the vial was reduced when KOH combined with CO2 and water was then pulled in by the suction.

Question 6

Effect of temperatures (room vs. cold) on respiration rate

Answer 6

Low temperatures= decrease cell respiration
high temperatures= increase cellular respiration

Question 7

Effect of germination v. non-germination on respiration rate

Answer 7

seed germinates= respiration rate increases
non germinating seeds use very little respiration