Taking a Look at Photosynthesis

The leaves of a plant are the main photosynthetic organs and are involved in gas exchange and water transportation throughout a plant (Evans et al, 17). A leaf typically consists of an upper and lower epidermis, the mesophyll cells, veins, guard cells and stomata. The mesophyll cells contains spongey cells which have large gaps between each cell to allow oxygen and carbon dioxide circulation. The mesophyll cells contain palisade cells, which are located beneath the upper epidermis. The palisade cells contain many chloroplasts, which are green organelles. Located in the internal layers of chloroplasts is the pigment chlorophyll which is involved in trapping the light energy in photosynthesis (Evans et al, 17).

The purpose of this lab is to observe the effect of white, green, and dark light on a photosynthetic plant using a volumeter and followed by the calculation of the net oxygen production using different wavelengths color of white and green light, and also the calculation of oxygen consumption under a dark environment, and finally the calculation of the gross oxygen production.

Chloroplast: An organelle bounded by a double membrane containing the enzymes and pigments that perform

Photosynthesis is a vital process that requires to utilize energy for plants. This experiment was done to evaluate the effects of carbon availability on photosynthetic activity. The aquatic plant Elodea densa was placed into sodium bicarbonate solutions of five concentrations ranging from 0.1% to 1.0%, in five independent trials (excluding the negative control treatment of water). The temperature and light intensity was constant. The results indicated a directly proportional relationship between the availability of carbon dioxide and the rate of photosynthesis of Elodea Densa, as photosynthesis continued to increase with increasing amounts of bicarbonate. The most O2 amount of oxygen produced was with the 0.7% NaHCO3 concentration and least with the control of water. The null hypothesis that stated carbon concentration does not affect rate of photosynthesis of the aquatic plant was rejected. The predicted hypothesis that an increase in bicarbonate concentrations results in an increase in the photosynthetic rate was accepted. In conclusion, there is a significant increase in photosynthetic activity as the concentration of NaHCO3 increases.

Virtual Lab #5- “Which Colors of the Light Spectrum are Most Important for Plant Growth?

Hello, my name is Audrey and welcome to my presentation on the chemistry of photosynthesis and cellular respiration.

Based on your data, draw a conclusion regarding how light intensity affects the rate of photosynthesis.

Intro outline Chloroplast function Its movements: photorelocation Importance of chloroplast location Proteins involved with it Correlation with light How the light induces the protein In plants, chloroplasts function to conduct photosynthesis where the photosynthetic pigment chlorophyll captures the energy from sunlight and converts it and stores it in the energy-storage molecules ATP and NADPH while freeing oxygen from water. They then use the ATP and NADPH to make organic molecules from carbon dioxide in a process known as the Calvin cycle. Chloroplasts carry out a number of other functions, including fatty acid synthesis, much amino acid synthesis, and the immune response in plants.

My hypothesis was correct. To measure the amount of carbon dioxide or CO2 in an exhaled breath, you need to use BTB solution and sodium hydroxide. In our procedure, the BTB reacted to the carbon dioxide and the sodium hydroxide reverses the reaction which allowed us to measure how much carbon dioxide is in our exhaled breath. As seen in the data, it took 5 drops of sodium hydroxide to get the BTB solution that had carbon dioxide blew into it to be the same color of the controlled BTB solution.

Chloroplast is an organelle. It is the cell in plants it contains chlorophyll.Chloroplasts absorb sunlight and mix it with water ,and carbon dioxide to make food and for the plant.Chloroplasts also then absorbs and collects light from the sun to produce the energy that is stored through a process called photosynthesis.Chloroplasts are one of the many organelles in the plant.In this respect they are similar to mitochondria. They are only found in plants..All organelles are surrounded by a cell membrane .They both have their own DNA, which are involved in energy metabolism; and both have reticulations, or infoldings, filling their inner spaces.Chloroplasts is commonly found in guard cells located in the plants leaves. Guard cells surround

For lab 12, it is hypothesized that chlorophylls a and b are present in a plant leaf and contribute to the starch production in photosynthesis. Also, products of photosynthesis will be present in leaf tissue exposed to red and blue light wavelengths for several days, but a decreased presence in leaf tissue exposed to green and black light wavelengths. In lab 13, it is expected that since chlorophylls a and b are more polar and smaller molecules than the anthyocyanins and carotenoids, they will travel higher up the chromatography paper than the other pigments.

Photosynthesis is a vital process that autotrophs use to transfer light energy into chemical energy. Photosynthesis ultimately produces O2 and glucose. It, like many other biological processes, can be affected by environmental variables. The variable that we altered in the following experiment are intensity, light wavelengths, and pigment types. In order to do this, we conducted three experiments. In the first experiment, we examined the effect of light intensity by placing vials with chloroplasts with DPIP at different light distances in which the results varied. Initially, 30cm away was the most effective for photosynthesis. Then 24cm appeared to be the most effective. Followed by 49cm at minutes 25 and 30. In the second experiment, we

This lab was called photosynthesis: understanding photosynthesis. It is a highly complex process that needs to be broken down in many steps to understand how it works. This lab covers the big components in photosynthesis including carbon dioxide intake, light consumption, and varying pigmentation.

Without photosynthesis we would not be able to receive energy. We should be more appreciate of plants, without them we would not survive. This paper will explain the basic components require for photosynthesis, the role of chlorophyll, how energy is transferred, and photosystems I and II and the most precious product results of photosynthesis.

The surface of the leaf is uniformly coated with a water-resistant waxy cuticle that protects the leaf from excessive absorption of light and evaporation of water. The transparent, colourless epidermis layer allows light to pass through to the mesophyll cells where most of the photosynthesis takes place.