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the rate of photosynthesis minus the rate of cellular respiration).

leaf cells, both in their structure and arrangement, show adaptations for maximising photosynthesis.

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Cellular Respiration and Photosynthesis

The build up of carbon dioxide will slow down the rate of respiration.
The rate of respiration is typically measured by the amount of oxygen consumed or the amount of carbon dioxide produced in a given time.
The full name for respiration is cellular respiration- because it occurs in the cells to release energy, a chemical process.

Spinach had the most pigment, but was not the plant with the fastest rate of photosynthesis.

These enter the roots of plants, allowing their growth and new supplies to food chains.
Photosynthesis by plants accounts for the high level (approximately 20%) of oxygen in the atmosphere.

photosynthesis and respiration notes | Photosynthesis | …

Therefore, the effects of respiration are typically seen only at night in plants.

Without light, plants are unable to go through photosynthesis so they go through cellular respiration which is why they are producing more CO2 than O2.

Some questions that have risen due to what we have learned is why the lettuce would not sink and is red cabbage the plant with the least amount of pigment?


"Photosynthesis in Leaf Disks." Biology Junction.

photosynthesis and respiration notes

The oxygen molecules produced by photosynthesis are not necessarily thesame oxygen molecules the plants use for respiration.

Lastly, the lowtemperatures are far outside the operating windows for the enzymes that control atree’s metabolic processes, such as photosynthesis and respiration.

We punched out ten equal pieces of each plant and put them into small cups filled equally with bicarbonate solution and waited for them to rise to the top, testing its rate of photosynthesis.
Kale performed photosynthesis the fastest in only 17 min with total pigment distance at 43mm.

Spinach performed photosynthesis the second fastest in 24 min with total pigment distance at 55mm

Cabbage performed photosynthesis the slowest at 25 min with total pigment distance at 0mm.
Our Results

Photosynthesis is a process unique to green plants and produces sugars, which are
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  • Photosynthesis and Respiration - Cellular Life Processes

    To take this to the next level, we could see if any other factor was effecting the rate of photosynthesis.

  • Photosynthesis and Cells of the Leaf

    Photosynthesis and cellular respiration are complementary biochemical reactions

  • Cell Respiration and Photosynthesis Lab by Kate Davis …

    Leaf Structure and Photosynthesis • Leaf Layers: – Cutin=waxy coating for_____

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Photosynthesis and respiration rates depend on leaf …

The many steps it takes to figure out the pigment levels of the chosen plants on photosynthesis rates makes this experiment interesting.

The Experiment
Chromatography Lab
To do this lab, we tested the pigments in the following five leaves: Lettuce, Cabbage (green), Red cabbage, Spinach, and Kale.
We applied pressure with a quarter onto the leaves to leave a pigment trail onto chromatography slips.

Future Research
To improve what we did we could test more plants, test the red cabbage for a longer period of time, and to discover another way to test the lettuce for its photosynthesis rate.

Photosynthesis and Cellular Respiration Flashcards | …

calvin cycle: CO2 turns into glucose

-Conversion of light energy into energy used by plants
-maintains atmospheric oxygen levels and is necessary for life on earth
Cellular respiration
-metabolic reaction that occurs inside of cells.
-main function is to produce ATP which powers the cell.

Cellular Respiration & Photosynthesis Lab Report - …

Above the maximum carbon dioxide concentration, further increases in carbon dioxide concentration have no further effect on the photosynthesis rate (because either the light-absorbing pigments are saturated and /or the carbon dioxide which is saturating the chloroplasts is limiting the Calvin cycle and/or the temperature is too low).
Because these three factors combine to determine the rate of photosynthesis, maximum rates of photosynthesis can alter if one of the other factors changes.
The rate of photosynthesis is typically measured as the amount of oxygen produced or the amount of carbon dioxide consumed in a given time.
Other environmental factors that can influence photosynthesis are the following.

Photosynthesis and Cellular Respiration Study Guide - Quizlet

Above the maximum, further increases in light intensity have no further effect on the photosynthesis rate (because either the light-absorbing pigments are saturated and /or the concentration of carbon dioxide is limiting the Calvin cycle and/or the temperature is too low).

LabBench Activity Plant Pigments and Photosynthesis

In the second part of this activity, student groups develop hypotheses about factors that influence the rate of net photosynthesis, and then each student group designs and carries out an investigation to test the effects of one of these factors. (NGSS)

Download Student Handout: or Download Teacher Preparation Notes: or
We invite comments on this Hands-On Activity and the accompanying Teacher Preparation Notes, including suggestions for other teachers who are planning to use the activity, useful preparatory or follow-up activities, additional resources or any questions you have related to the activity, or a brief description of any problem you might have encountered.

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