AN INVESTIGATION OF PHOTOSYNTHETIC ELECTRON TRANSPORT OF CHLOROPLASTS FROM _SILVERBEET LEAVES_ Introduction Photosynthesis is the process by which plants use the energy from sunlight to produce sugar‚ which cellular respiration converts into ATP‚ the "fuel" used by all living things. The conversion of unusable sunlight energy into usable chemical energy is associated with the actions of the green pigment‚ chlorophyll. Light Dependent Reactions are the initial stage of photosynthesis‚ in which solar
Free Photosynthesis Energy
Electron Transport Chain The first step in the electron transport chain process is for the NADH2 produced during glycolysis‚ the intermediate step‚ and the citric acid cycle to be attracted to Complex I (FMN ·FeS)due to its high affinity for NADH2. This attraction pulls NADH2 to Complex I (NAD dehydrogenase) and the two electrons from H2 are pulled off by the FeS (ferrous sulfate) leaving two H+ ions and NAD+. These molecules repel each other and this results in the NAD+ being recycled
Premium Cellular respiration Mitochondrion Adenosine triphosphate
of the electron transport chain in cellular respiration. In your explanation‚ discuss and identify key molecules involved in this process and explain their relationship which each other in terms of how they contribute to the main cellular purpose of this process. Electron transport chain plays a key role of in the production of oxygen in cellular respiration. ETC uses many enzymes located on the inner mitochondrial membrane during the production of oxygen. The source of these electrons are NADH
Premium Adenosine triphosphate Metabolism Cellular respiration
Light Dependent Reactions The light dependent reaction of photosynthesis involves the transfer of sunlight energy into two things: The production of ATP Reduction of coenzyme NADP to NADPH NADP – Nicotinamide adenine dinucleotide phosphate NADPH – Reduced NADP The energy from sunlight is used to excite an electron‚ within a primary pigment‚ to a higher energy level. The excited electron is then donated to an electron acceptor leaving the chlorophyll molecule oxidised and reducing the acceptor
Premium Photosynthesis
2.5) Light Dependent Resistors (Section 1) 1. Write down your hypothesis. Explain why you made this hypothesis. Hypothesis: When it is day there is more light hitting the LDR and so its resistance decreases and the light turns off. When it is night there is less light so the LDR has higher resistance and the light turns on. Explanation: When light shines on a Light Dependent Resistor‚ electrons are released and the current can get larger. So as the light intensity increases‚ more electrons are released
Premium Ohm's law Electric current Resistor
Essay During the Light Dependent Reactions‚ activity occurs within the thylakoids of the chloroplast. NADP+ accepts two high energy electrons and an H+ ion and then converts into NADPH. This process ultimately traps some of the sunlight in chemical form. Then‚ NADPH is able to carry the energy it absorbs to the rest of the cell. The reaction produces O2 gas and converts ADP to ATP and NADP+ to NADPH. First‚ pigments in Photosystem II absorb light‚ which is then absorbed by electrons‚ which are then
Premium Photosynthesis Light Oxygen
Time for the juice the decolorized 2. Dependent variable The concentration of DCPIP solution 3. Controlled variable The concentration of DCPIP solution The amount of fruit juice The temperature The time that the juice expose to the air Section C. Introduction 1. Background information DCPIP is an enzyme-catalyzed oxidation electron acceptor that is pink in its oxidized form. In normal condition‚ DCPIP is blue dyed. When DCPIP is added into vitamin C solution‚ the vitamin
Premium Vitamin C Filter paper Lemon
Oxygen Carbon dioxide + Water + Energy 3. Both cellular respiration and photosynthesis are redox reactions. In redox‚ reactions pay attention to the flow of electrons. What is the difference between oxidation and reduction? In a redox reaction‚ the loss of electrons from one substance is called oxidation‚ and the addition of electrons to another substance is known as reduction. 4. The following is a generalized formula for a redox reaction: Xe– + Y X + Ye– Draw an arrow showing which
Free Cellular respiration Adenosine triphosphate Photosynthesis
New cells arise by division of existing cells Cell division occurs in the nucleus of eukaryotic cells by mitosis and meiosis Replacement of the entire lining of your small intestine Liver cells only divide for repairing Nerve cells do not divide Chromosomes Long and thin for replication and decoding Become short and fat prior mitosis → easier to separate due to compact form Meiosis (reduction division) During the production of sex cells (gametes) in animals In spore formation which precedes
Free DNA RNA
LIGHT IN PHOTOSYNTHESIS Theory: Leaf discs float normally. When the air spaces are infiltrated with the solution the overall density of the leaf disc increases and the disc sinks. The infiltration solution includes a small amount of sodium bicarbonate. The bicarbonate ions serve as the carbon source for photosynthesis. As photosynthesis proceeds oxygen is released into the interior of the leaf which changes the buoyancy – causing the discs to rise. Since cellular respiration is taking place
Premium Sodium bicarbonate Oxygen Carbon dioxide