Page 17 - Chapter 07
P. 17
Experiment To investigate the release of heat during
aerobic respiration in germinating seeds
7.5
Date ________________
In aerobic respiration oxygen reacts with glucose and produces carbon dioxide,
Background water and energy. Energy is released in the form of Adenosine Tri-phosphate
Information (ATP) and heat. This heat raises the temperature of germinating seeds.
Materials Pea seeds, two thermos flasks, two thermometers, cotton, iron stand, marker
Required
Procedure ΠTake some germinating seeds. ! CAUTIONS
Boil some seeds for 10 minutes so that they • Don't use seeds
Ž die. which have been
soaked for a long
Take two thermos flasks and mark them “A” time.
and “B”
Put the live seeds (un-boiled) in “A” and dead seeds (boiled) in “B”
Insert a thermometer in each flask and plug it with cotton.
‘
BRAIN TEASERS Invert the flasks and set the apparatus as shown in diagram. Flask
’
• What are the advantages “A” will serve Flask A Flask B
of inverting the flasks? as
• Why germinating seeds experimental
were used in flask “A”
while killed seeds were and “B” as
used in flask “B”?
control
Keep the
apparatus for
24-48 hours.
“ Note the
reading of
thermometers Figure 7.5.1: Experiment setup to investigate the
before the start release of heat during aerobic respiration
and at the end
of experiment.
90
aerobic respiration in germinating seeds
7.5
Date ________________
In aerobic respiration oxygen reacts with glucose and produces carbon dioxide,
Background water and energy. Energy is released in the form of Adenosine Tri-phosphate
Information (ATP) and heat. This heat raises the temperature of germinating seeds.
Materials Pea seeds, two thermos flasks, two thermometers, cotton, iron stand, marker
Required
Procedure ΠTake some germinating seeds. ! CAUTIONS
Boil some seeds for 10 minutes so that they • Don't use seeds
Ž die. which have been
soaked for a long
Take two thermos flasks and mark them “A” time.
and “B”
Put the live seeds (un-boiled) in “A” and dead seeds (boiled) in “B”
Insert a thermometer in each flask and plug it with cotton.
‘
BRAIN TEASERS Invert the flasks and set the apparatus as shown in diagram. Flask
’
• What are the advantages “A” will serve Flask A Flask B
of inverting the flasks? as
• Why germinating seeds experimental
were used in flask “A”
while killed seeds were and “B” as
used in flask “B”?
control
Keep the
apparatus for
24-48 hours.
“ Note the
reading of
thermometers Figure 7.5.1: Experiment setup to investigate the
before the start release of heat during aerobic respiration
and at the end
of experiment.
90
