Question

Compare and contrast regulation df enzymes via allosteric or covalent modification. 4 points 10. M atch the donar molecule with its assodiated modifying enzyme. Donor more than once or nat at all. 4 points A) PEP B) SAM C) SAH D) ATP E) Acetyl-COA F Lys malecules may be used Kinase Methyltransfer ase Lysine Acetyl Transfer ase ーAdenylyl Transera” 11. Discus in detalil, axygenic phatoeynthesis and highlight where differ ences occur in comparison to anoxygenic photosynthesis 12 points
I need help on questions 10 and 11 please!

Answer 1

Ans10. A) PEP - Kinase

B) SAM - Methyltransferase

C) SAH -

D) ATP - Kinase, adenylyltransferase

E) Acetyl-CoA -

F) Lys - Lysine acetyltransferase, Methyltransferase

Ans. Oxygenic photosynthesis occurs in mostly, eukaryotic microorganisms like algae and in bacteria such as cyanobacteria. The energy of the sunlight is converted into chemical energy by the processs of photosynthesis. The light is captured by the green pigments called chlorophylls possessed by photosynthetic organisms. Using this absorbed energy, chlorophyll reaction centers of the photosystems brcome excited and release electrons which contain high energy. These high energy electrons flow through several electron carriers and convert water and carbon dioxide into glucose and oxygen. These excited electrons travel in a non-cyclic chain and terminate at NADPH. Due to the generation of oxygen, this process is called oxygenic photosynthesis and also non-cyclic photophosphorylation.

Anoxygenic photosynthesis is used by the purple bacteria, green sulfur and non-sulfur bacteria, heliobacteria and acidobacteria. Anoxygenic photosynthesis is the process in which the light energy is converted to light energy chemical energy without generating molecular oxygen as a byproduct. Without generating oxygen, ATP is produced by the bacterial groups. Water is not used as the initial electron donor in anoxygenic photosynthesis. Therefore, no oxygen is generated during this process. Only one photosystem is involved with anoxygenic photosynthesis. Hence, electrons are transported in a cyclic chain and returned to the same photosystem. Therefore, anoxygenic photosynthesis is also known as cyclic photophosphorylation.