Name: Bisnan, Ysabel Mari M. Professor: Ma’am Gecelene Es
Date: June 16, 2022
Activity 3
Plant Respiration
I. Introduction:
In order to survive, organisms require a source of energy and molecular building blocks to constru
molecules. The ultimate source of energy for almost all of life on Earth is the light that comes from
on the next page for an example of organisms that do not depend on light as the ultimate source of e
and cellular respiration are two of the most important biochemical processes of life on Earth. Both a
that are catalyzed by unique enzymes at each step. Although it is somewhat of an oversimplificati
“opposite” sets of reactions, for introductory purposes let us examine them as such. Photosynth
organisms are those that can take simple molecules from the environment such as carbon dioxide
and using the energy of the sun, create their own biological macromolecules such as carbohydrat
nucleic acids. You will note that the reactions of photosynthesis are both endothermic and anabol
energy and use small molecules to make larger ones. These reactions take place in the chloroplasts
Like photosynthesis, cellular respiration is also a series of chemical reactions. However, rather than
process involves the breakdown of molecules (e.g., glucose) releasing energy that can be used fo
process in a cell. Thus, we call these reactions catabolic and exothermic. These reactions occu
bacteria and the mitochondria of eukaryotic cells (including plants!). Ultimately, the energy release
is used to form molecules of ATP, which can be described as the “energy currency” in the cell. Ju
dollars as a means to transfer wealth, cells use molecules of ATP as a means to transfer energy
cellular respiration to other reactions in the cell that require energy. In essence, cells convert the
molecule like glucose (e.g., a savings bond) into more useable molecules with energy called ATP (e
actually be spent). In addition, since larger molecules such as glucose are broken down into the sm
dioxide (CO2) and water (H2O), this is catabolic process.
II. Objectives
To study the rate of respiration in germinating seeds having different substances suc
, ,
III. Materials
Fresh Leaves
Water
Sunlight
Bowl/ Basins
IV. Procedure
1. Fill the basins with water just enough to submerge the leaves.
2. Put the fresh leaves into the basin with one leaf facing up, and the other leaf facing d
3. Place coins on top of the leaves to help it sink and remain underwater.
4. Observe each leaf before leaving it under the sunlight for 2-3 hours.
5. After 2-3 hours, observe the difference between the leaf facing up and the leaf facin
Date: June 16, 2022
Activity 3
Plant Respiration
I. Introduction:
In order to survive, organisms require a source of energy and molecular building blocks to constru
molecules. The ultimate source of energy for almost all of life on Earth is the light that comes from
on the next page for an example of organisms that do not depend on light as the ultimate source of e
and cellular respiration are two of the most important biochemical processes of life on Earth. Both a
that are catalyzed by unique enzymes at each step. Although it is somewhat of an oversimplificati
“opposite” sets of reactions, for introductory purposes let us examine them as such. Photosynth
organisms are those that can take simple molecules from the environment such as carbon dioxide
and using the energy of the sun, create their own biological macromolecules such as carbohydrat
nucleic acids. You will note that the reactions of photosynthesis are both endothermic and anabol
energy and use small molecules to make larger ones. These reactions take place in the chloroplasts
Like photosynthesis, cellular respiration is also a series of chemical reactions. However, rather than
process involves the breakdown of molecules (e.g., glucose) releasing energy that can be used fo
process in a cell. Thus, we call these reactions catabolic and exothermic. These reactions occu
bacteria and the mitochondria of eukaryotic cells (including plants!). Ultimately, the energy release
is used to form molecules of ATP, which can be described as the “energy currency” in the cell. Ju
dollars as a means to transfer wealth, cells use molecules of ATP as a means to transfer energy
cellular respiration to other reactions in the cell that require energy. In essence, cells convert the
molecule like glucose (e.g., a savings bond) into more useable molecules with energy called ATP (e
actually be spent). In addition, since larger molecules such as glucose are broken down into the sm
dioxide (CO2) and water (H2O), this is catabolic process.
II. Objectives
To study the rate of respiration in germinating seeds having different substances suc
, ,
III. Materials
Fresh Leaves
Water
Sunlight
Bowl/ Basins
IV. Procedure
1. Fill the basins with water just enough to submerge the leaves.
2. Put the fresh leaves into the basin with one leaf facing up, and the other leaf facing d
3. Place coins on top of the leaves to help it sink and remain underwater.
4. Observe each leaf before leaving it under the sunlight for 2-3 hours.
5. After 2-3 hours, observe the difference between the leaf facing up and the leaf facin
