Answer:
The purine ring is built onto ribose-5-phosphate of PRPP for its de-novo nucleotide biosynthesis, while the ring structure of the pyrimidine bases are synthesized separately and then coupled to ribose-5-phosphate via the C-N glycosidic bond.
Explanation:
In the de novo synthesis of nucleotides, their metabolic precursors such as aminoacids, ribose-5-phosphate, CO₂ and NH₃ are used as starting materials.
In purine nucleotide synthesis, the ring structure is built up on ribose-5-phosphate of PRPP by addition of one or a few atoms one at a time starting with the amino group donated by glutamine until the first intermediate inosinate is synthesized.
In pyrimidine ring synthesis, orotate is first synthesized from carbamoyl phosphate and aspartate, and then is attached to ribose-5-phosphate of PRPP, before it is then converted to the common pyrimidine nucleotides starting from uridylate.
Answer:
Closing the stomata, or stoma, on the underside of the leaves in order to reduce water loss through the stoma during transpiration.
Answer:
13 and 56 and 838 and 393 and 82 and 8
Explanation:
because it a potion answer and it has to be the best like mrbest ok guys am so
Answer:
Cacti
Explanation:
The well know desert plant Cacti have been a very interesting speciman in terms of survival and its adaptation to its enviornment in order to succeed in the game of survival.
- In order to maintain the moisture within the plant, its leaves are in the shape of needles which can lead to less water evoporating from the plant.
- The inners of Cacti have been modified to store water for prolonged periods of time in order to survive the long periods of drought and lack of water.
- The structure and outer skin of the Cactus has been able to help them once again maintain water levels within itself as traits such as waxy and thick skin cover the entirety of the plant.
Dugesia possess a central tubular digestive tract and this has three branches. These branches consist of ceca, which deliver nutrients to the body.
