Porphyrin ring molecules are critical both for oxidative phosphorylation in the mitochondria and for photosynthesis in...
Porphyrin ring molecules are critical both for oxidative phosphorylation in the mitochondria and for photosynthesis in chloroplasts. Compare and contrast the role of this type of molecule in each process and explain the roles of O2 and H2O in each.
Homework Answers
Porphyrins are complex chemical compounds that are large heterocyclic organic ring structures. The complex ring structures of porphyrins are comprises of 4 customized pyrroles (5-membered organic ring) subunits linked by methine (carbon with one double bond and two single bonds: =CH-) bridges. The naturally occurring porphyrins of biological significance are the hemes. Hemes in biological systems consist of ferrous iron (Fe2+) complexed with four nitrogens of the specific porphyrin molecule identified as protoporphyrin IX. The major function of heme in humans is its role in the coordination of O2 molecules in hemoglobin. There are 3 structurally different types of hemes in humans recognized as heme a,b, and c. Further adding to the heme b of hemoglobin and its function in the transport of oxygen, hemes are significant for the biological functions of several enzymes such as the cytochromes of oxidative phosphorylation and the xenobiotic-metabolizing enzymes of the cytochrome P450 family (CYP).
Cytochrome C is referred to as a cytochrome for its heme group structure. Cytochrome C contains an iron atom surrounded by a porphyrin ring. The oxidation and reduction of the iron atom permit the cytochrome to transmit individual electrons from one complex to another complex in the ETC.
In plants photosynthesis, The head portion of a chlorophyll molecule is a ring-like structure called a porphyrin ring. The chlorophyll (chloroplast) porphyrin ring consists of a magnesium atom at its middle or center. This center part of a chlorophyll molecule absorbs light energy. This energy is used for the procedure of photosynthesis.
For the process of photosynthesis, the water provides an electron in photosystem II to the chlorophyll and also it produces oxygen and reduces the NADP to NADPH by liberating H+ ion.
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Porphyrin ring molecules are critical
both for oxidative phosphorylation in the mitochondria and for
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YOU MUST ANSWER THE FOLLOWING QUESTIONS ON YOUR OWN PRIOR TO CLASS REVIEW! 1. Label the...
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27) Which one of the following best describes the electron transport chain? A) Electrons are passed...
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please answer all. thanks. 67. * Nor involved here respiration SO or 72.> ATĚ when glucose...
please answer all. thanks.
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I'd like to ask the answers for all of the uestions Question 1. A reaction in...
I'd
like to ask the answers for all of the uestions
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Classify each statement as being involved in substrate-level phosphorylation, oxidative phosphorylation, or both. Substrate-level phosphorylation Oxidative phosphorylation Both Answer Bank Bank oxidation-reduction reactions occuring involves electron transport chains relatively large amounts of ATP produced per glucose molecule oxidized relatively small amounts of ATP produced per glucose molecule oxidized occurs in the cytosol occurs in the mitochondria high-energy phosphate groups transferred to ADP
YOU MUST ANSWER THE FOLLOWING QUESTIONS ON YOUR OWN PRIOR TO CLASS REVIEW! 1. Label the path of electrons through the light reactions of photosynthesis using the illustration below. A. Include PSII and PSI and label all the complexes involved i. Which complex pushes H* across the membrane? ii. Where do these electrons end up? iii. What is the purpose of splitting H2O? iv. Where do the light reactions take place? 2H2D Ot ENR NAOD ADP photolyetemi photosyetemi wlochtone be-...
27) Which one of the following best describes the electron transport chain? A) Electrons are passed from one carrier to another releasing a little energy at each B) Hydrogen atoms are added to CO2 to make an energy-rich compound. C) Electrons are pumped across a membrane by active transport. D) Glucose is broken down to a three-carbon compound 28) After completion of the citric acid cycle, most of the usable energy from the one molecule is in the form of...
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What molecules can pass people? through a lipid membrane? Which molecules are at 4. What technology was used to figure out the fluidity of cell membranesie the membrane pids are mobile? 5. Does the mobily membrane proteins der so why Look at worksheet for das 21 Compare MPL MP2 and MP3 proteins & What is the role of SRP in the rouch ER? 7. Draw apath for a n d protein from gene expression to secretion Nudes where the is...
please answer all. thanks.
67. * Nor involved here respiration SO or 72.> ATĚ when glucose is coinpletely oxidited to CO2H2O? The major purpose of Ozg) in aerobie respiration lor of reducing pyruvate* in anaerobie respiration is a) to phosphorylate the maximum number of ATP molecules b) regenerate NAD so the processes may Continue (c) allow for the replacement of Ho molecules that are split (d) mobilize succeeding glucose molewles glycolysis can continue 68. Carbon dioxide during which one or...
I'd
like to ask the answers for all of the uestions
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