Questions about photosythesis

Light is actually energy, electromagnetic energy to be exact. However, instead of fixing carbon during the day and pumping the OAA to other cells, CAM plants fix carbon at night and store the OAA in large vacuoles within the cell.

Rate of photosynthesis versus light intensity at different temperatures 2 factors Initially the graph lines are linear as the rate of photosynthesis is proportional to the light intensity see also Graph 1. Won't they run out of electrons. These plants, called C4 plants and CAM plants, initially bind carbon dioxide using a much more efficient enzyme.

The water and nutrients from the soil are absorbed through the roots of the plant. In most plants, carbon fixation occurs when CO 2 reacts with a five-carbon compound called RuBP ribulose 1,5-bisphosphate.


View the released items in the released item documentswhich display items from the paper-based next-generation tests and the legacy tests in PDF format. This picture shows three thylakoids stacked one on top of the other. Photosynthesis may be over, but it is not the end for these important molecules.

Basically, it is the food for the plant to survive and grow. You can measure the speed of an air bubble by the scale ok or measure the volume of gas formed, maybe. The hydrogen atoms are further broken down into a hydrogen ion and an electron.

However, just prior to point X on the graph, the increase in rate slows down, and finally at point X on the graphs, the rate of photosynthesis reaches a maximum irrespective of the light intensity. Which is the pigment present in carrot. Glycolysis oxidizes one molecule of glucose into two molecules of pyruvate through a series of 10 enzymatic reactions.

This is as far as it goes in the chloroplast, and is the official end of photosynthesis. During constitutive secretion, proteins are synthesized and moved to the cell membrane without regard to extracellular signals.

Glucose is the basic fuel and basic building material for much of life. Investigation using the chloroplasts Read all the instructions before you start.

The various types of chlorophyll and carotenoid molecules are the pigments placed in the membrane. Minerals are obtained through water in form of dissolved salts. There is also a steady flow of electrons, from the water, through various steps through the membrane, and finally to NADPH.

BUT the light intensity is inversely proportional to the distance between the light source and the experiment tube squared. This allows a more efficient harvest of CO 2allowing the plant to trap sufficient CO 2 without opening its stomates too often.

This animation takes a closer look at those reactions and the enzymes that catalyze them. I think a light meter is essential for accurate results - changing the lamp distance is relevant to changing the light intensity, BUT, intensity is NOT a simple function of distance.

Back to the Top of the Page. Which are the two types of photosynthetic pigments. The next step for the half-glucose molecules is to pass through the chloroplasts outer membrane into the cell. Scientists generally break photosynthesis into two stages, the light reactions and the dark reactions.

BioCoach Activity

The entire process is called photosynthesis, and without it people and other animals would not be able to live and grow. TOP OF PAGE Graphs demonstrating more than one limiting factor controlling the rate of photosynthesis In experiments using eg Canadian pondweed, you can immerse the green weed in sodium hydrogencarbonate solution to supply the carbon dioxide one variable needed for photosynthesis.

Chlorophylls are the main pigments as they are involved in the conversion of light energy into chemical energy. This overview of the various processes involved in Energy Consumption shows the important connections between the plant and animal worlds.

The enhancement of Human Photosynthesis means improvement in quality of life.

OAA is then pumped to another set of cells, the bundle sheath cells, which surround the leaf vein. They link up with another oxygen molecule to form O2, then they flow back out to the air from whence they came. Possible practical work you may have encountered - methods of measuring the rate of photosynthesis You can investigate the need for chlorophyll for photosynthesis with variegated leaves Taking thin slices of potato and apple and adding iodine to observe under the microscope - test for starch.

The heat energy maintains the optimum temperature required for the enzymes to function. Hence, they are important for photosynthesis. Without photosynthesis, the plants would not be able to live and grow.

The Molecules Chlorophyll is the magic compound that can grab that sunlight and start the whole process.

Investigating the light dependent reaction in photosynthesis

The sunlight is absorbed through a plant by its leaves, or other green parts. The lac operon refers to the gene responsible for digesting lactose molecules in a bacterial cell. Interactive animation showing how ATP functions like a rechargeable battery in the transfer of energy.

Carbon Dioxide During photosynthesis, carbon dioxide is converted into carbohydrates and this is called fixing of carbon dioxide. The carbon dioxide of the atmosphere is used by the terrestrial plants whereas the hydrophytes use the carbon dioxide dissolved in the water.

Photosynthesis. Leaves are nature's food factories.

Cells : Photosynthesis Quiz

Plants take water from the ground through their roots. They take a gas called carbon dioxide from the air. Scientific American is the essential guide to the most awe-inspiring advances in science and technology, explaining how they change our understanding of the world and shape our lives.

Photosynthesis - All living things need food and energy to survive. The food-making and energy process for plants to survive is called photosynthesis. Plants make food and produce oxygen through photosynthesis.

The process is complex but with the sun, water, nutrients from the soil, oxygen, and chlorophyll, a plant makes its own food in order to survive. Chlorophyll is a green. Make any video your lesson.

Questions about photosythesis
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Photosynthesis Questions