Photosynthesis
What is original source of energy for almost all living things on this planet?
sunlight
What does ATP stand for?
Adenosine Triphosphate
Where do Light Dependent reactions take place?
thylakoids
What gas in our atmosphere is used by plants during the Light Independent Reactions?
carbon dioxide (CO2)
In our leaf disk lab we observed leaf disks floating to the surface during our time of data collection. Why did the leaf disks float?
The spinach leaf disks produced oxygen during photosynthesis and this caused the leafs to float.
What are the 2 groups of chemical reactions in Photosynthesis?
Light Dependent Reactions and Light Independent Reactions
What are the 3 chemical parts of ATP?
Adenine, Ribose, Phosphate
What molecule in the light dependent reactions collects sunlight?
chlorophyll
Where do the Light Independent Reactions occur?
storm of the chloroplast
We conducted a virtual "paper chromatography" lab and calculated the Rf value for each pigment. What was the Rf value used for?
identify the type of pigment
What are 3 things affect the rate of Photosynthesis?
Factors that affect the rate of Photosynthesis are the temperature, availability of water, light intensity, availability of carbon dioxide.
chemical bonds & by removal of a phosphate.
In addition to light, what other molecule is also required in the light dependent reactions?
water (H2O)
Why is it INCORRECT to call the Light Independent Reactions the "Dark Reactions"?
These chemical reactions can happen both in the light and in the dark. NOT just in the dark.
Early in our understanding of photosynthesis, a person by the name of Jan Baptista van Helmont conducted a very important experiment. Explain his experiment and what he concluded at the end.
He grew a willow tree for 5 year, only watered the tree and concluded that the increase in mass was due ONLY to the water he added.
What part of the cell is used in photosynthesis?
chloroplast
ADP and a phosphate must be added back to ADP
What are the 3 products of the light dependent reactions?
oxygen, ATP, NADPH
What product of the Light Independent Reactions is used by heterotrophs?
glucose
How are the experiments of Joseph Priestly and Jan Ingenhousz related to each other and important to our understanding of photosynthesis?
Priestly learned that oxygen was produced during photosynthesis and Ingenhousz discovered light is necessary for this oxygen to be produced.
What is the Photosynthesis chemical equation?
6 H2O + 6 CO2 + Light ————> C6H12O6 + 6 O2
Where does the energy come from to regenerate ADP to ATP?
glucose
The Light Independent Reactions CANNOT occur without the Light Dependent Reactions. Explain why.
The ATP and NADPH are used to power the light independent reactions.
ADP & NADP+
The visible spectrum is important to the process of photosynthesis. Based on what you know, what parts of the visible spectrum tend to be used the most by plants and how does this spectrum explain why plant are green?
Plants tend to use the purple/blue & red/orange parts of the spectrum most while reflecting the yellow/green parts. This reflected part is seen by our eyes and explains why plants are green.