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:
Liza was unprepared for menarche; her mother hadn't even told her about it yet.
Explanation:
The body of the teenagers undergoes through the different physical and physiological change. Both girls and boys becomes reproductively mature and has changed in the voice and development of special physical characters.
The girls starts shows menstruation. The start of the menstruation is known as menarche. The girls should give prior knowledge and support during this stage. In case of Liza, she was unprepared for the menarche and has no prior knowledge. The Liza's mother did not give her any knowledge.
Thus, the correct answer is option (a).
When there is an increase in water volume in plasma, it causes the hydrostatic pressure in plasma to increase and the osmotic pressure to decrease and as a result, water will move out of plasma.
<h3>How does increased water volume affect hydrostatic pressure in plasma</h3>
When water volume in plasma increases, the hydrostatic pressure will increase.
Increase in water volume will result in a decrease in the osmotic pressure of plasma due to dilution of the solutes in plasma.
Therefore, to maintain homeostasis, water will move out of the plasma by simple diffusion and osmosis.
Therefore, increased water volume causes the hydrostatic pressure in plasma to increase and the osmotic pressure to decrease and as a result, water will move out of plasma.
Learn more about osmotic pressure and hydrostatic pressure at: brainly.com/question/8852471
