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lana66690 [7]
3 years ago
13

What are the reactants and products at each stage of cellular respiration? Including amounts.

Biology
1 answer:
drek231 [11]3 years ago
6 0

Explanation:

In all eukaryotic cells mitochondria are small cellular organelles bone by membranes views make most of the chemical energy required for powering the biochemical reactions within the cell. This chemical energy is stored within the molecule ATP which is produced. Respiration in the mitochondria utilizes oxygen for the production of ATP in the Krebs’ or Citric acid cycle via the oxidization of pyruvate( through the process of glycolysis in the cytoplasm).

overall: C6H12O6 (glucose) + 6 O2 → 6 CO2 + 6 H2O + ≈38 ATP

Oxidative phosphorylation describes a process in which the NADH and FADH2 made in previous steps of respiration process give up electrons in the electron transport chain these are converted it to their previous forms, NADH+ and FAD. Electrons continue to move down the chain the energy they release is used in pumping protons out of the matrix of the mitochondria.

This forms a gradient where there is a differential in the number of protons on either side of the membrane the protons flow or re-enter the matrix through the enzyme ATP synthase, which makes the energy storage molecules of ATP from the reduction of ADP.  At the end of the electron transport, three molecules of oxygen accept electrons and protons to form molecules of water

  • Glycolysis: occurs in the cytoplasm 2 molecules of ATP are used to cleave glucose into 2 pyruvates,  4 ATP and 2 electron carrying NADH molecules.
  • The Kreb's cycle: in the mitochondrial matrix- 6 molecules of CO2 are produced by combining oxygen and the carbon within pyruvate,  2 ATP oxygen molecules, 8 NADH and 2 FADH2.
  • The electron transport chain, ETC: in the inner mitochondrial membrane, 34 ATP, electrons combine with H+ split from 10 NADH, 4 FADH2,  renewing the number of electron acceptors and 3 oxygen; this forms 6 H2O, 10 NAD+, 4 FAD.

Learn more about cellular life at brainly.com/question/11259903

Learn more about cellular respiration at brainly.com/question/11203046

#LearnWithBrainly

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Select the true statements about protein secondary structure.
saul85 [17]

Answer:

C.The β‑pleated sheet is held together by hydrogen bonds between adjacent segments.

Explanation:

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The most common secondary structures are α-helix and β-sheets. The structures are defined by regular hydrogen bonds formed between the N-H and C=O groups of the amino acids that form the chain. These structures form in segments of the protein as an intermediate before it folds into the 3D tertiary structure.

<u>α helix  </u>

It is a cylindrical structure that comprehends a helical backbone, while the side chains extend outward in a helical distribution. The α-helix stabilizes through hydrogen bonds between the amines and carbonyls groups of the backbone. Each carbonyl group forms a hydrogen bond with the amine group four residues later in the main chain. Thus, except for the amino acids near the end of the α-helix, all the carbonyls and amines groups in the main chain are linked by hydrogen bonds. Each residue corresponds to a translation of 1,5Ǻ and a turn of 100º this equals 3,6 residues per turn.

From the observer point of view, if the rotation of the helix is clockwise or right-handed, it's called dextrorotation and if the rotation is counterclockwise or left-handed it's called levorotation. Dexorotation or dextrogyre is the most common rotation of α-helixes in proteins. Levorotation or levogyre is very rare but can be found in proteins with a large content of achiral glycine.

<u>β-sheets (β-pleated sheets) </u>

This structure consists of at least two β-strands (polypeptide chains), the strands conform a backbone of three to ten amino acids in an extended formation that connects laterally with hydrogen bonds. The distance between adjacent amino acids in a β-strand is approximately 3,5Ǻ in contrast to the 1,5Ǻ distance of an α helix. The chains that form a β-sheet have directionality conferred by their N-terminus and C-terminus. Adjacent β-strands can form hydrogen bonds in antiparallel, parallel or mixed arrangements. In the antiparallel arrangement, the adjacent strands are said to have opposite directions (N-C vs C-N) this allows the bonds to be established between the amines and carbonyls groups of each amino acid with the carbonyls and amines of the adjacent amino acid. This way the bonds between carbonyls and amines are planar, which allows strong interstrand stability.

In the parallel arrangement, the adjacent strands have the same direction (N-C vs N-C). In this type of arrangement, each amine forms a hydrogen bond with the carbonyl of the adjacent amino acid, but its carbonyl group forms a hydrogen bond with the amine group of the amino acid two residues later.

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