Answer: All of the statements are true.
Explanation:
Purines are biologically synthesized as nucleotides and in particular as ribotides, that is, bases attached to ribose 5-phosphate. Adenine and guanine are both derived from the nucleotide inosine monophosphate (IMP), which is the first compound in the pathway to have a completely formed purine ring system.
Purine nucleotides can be synthesized in two distinct pathways. First, purines are synthesized de novo, starting with simple starting materials such as amino acids and bicarbonate. the purine bases are assembled already attached to the ribose ring. Alternatively, purine bases, released by the hydrolytic degradation of nucleic acids and nucleotides, can be salvaged and recycled. Purine salvage pathways are mostly noted for the energy that they save and the remarkable effects of their absence.
All statements are correct because the organization of purine synthetic enzymes involves multifunctional enzymes, reversible enzyme formations, through out the sequence there is maintenance of high local concentration and the ten steps requires only six enzymes.
Answer:
Bacteria in the lungs may play a major role in disease — and health. Researchers have just mapped where the bacteria are and how they arrived, paving the way for more discoveries about the lung microbiome.
Explanation:
Hope it helps!
Answer:
A police officer who allows select people to enter and leave a crime scene.
Explanation:
This job of a police officer best describes the selectively permeablity function of a cell membrane in which it allows the entrance of some selected substances whereas blocks the entrance of unwanted substances.
Hope this helps
Answer:
what do you need to know?
Explanation:
I learned about this in bio last year, maybe I can help
