Microbiology with Diseases by Taxonomy Chapter 5 Answers 1CT
An organism that uses glycolysis and TCA (tricarboxylic acid) cycle or Kreb’s cycle might also need the pentose phosphate
pathway.
The pentose phosphate pathway can be used for the reduction of coenzymes and for specific by-products, which are needed
for anabolic pathways. These by-products are the precursors in anabolic reactions. The reduced coenzymes are also useful
in anabolic reactions.
Microbiology with Diseases by Taxonomy Chapter 5 Answers 1FB
Cyclic photophosphorylation:
Explanation:
1.In cyclic photophosphorylation, the electrons from the reaction center pass through electron transport chain and back to the
reaction center.
2.The reaction center of chlorophyll is present in a photosystem. Light energy from the sun excites the electrons in the reaction
center.
3.These electrons then pass on to an acceptor molecule. The electrons pass through an electron transport chain and back to
the chlorophyll molecule.
4.In non-cyclic photophosphorylation, the electrons do not return to the place of origin.
The cyclic photophosphorylation process is shown in the diagram below:
The cyclic photophosphorylation process is shown in the diagram below:
Microbiology with Diseases by Taxonomy Chapter 5 Answers 1M
Substrate-level phosphorylation:
Explanation
Substrate-level phosphorylation occurs when energy from a compound containing phosphate reacts with ADP
(adenosine triphosphate) to form ATP (adenosine triphosphate). The direct transfer of a phosphate group between two
substrates from ATP is known as substrate-level phosphorylation.
Similarly, the process of substrate-level phosphorylation can be seen in the glycolysis pathway. The formation of pyruvate
in the last step of glycolysis is a substrate-level phosphorylation. The phosphate from phosphoenol pyruvate is transferred
to an ADP molecule to form ATP.
Thus, substrate-level phosphorylation occurs in Krebs cycle of the mitochondria. This process is a fast source of ATP in
the cell that is independent of respiration and external electron acceptors.
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