Answer:
a. they are central to the re-synthesis of nucleotides from bases in salvage reactions.
Explanation:
Phosphoribosyltransferases are the enzymes that are involved in salvage pathways to reuse the free purines and pyrimidines to make nucleotides. Metabolic degradation of nucleotides releases purines and pyrimidines which in turn enter the salvage pathway to be reused in the formation of new nucleotides. These metabolic pathways that make new nucleotides by reusing the free purines and pyrimidines are called salvage pathways.
Example: Adenosine phosphoribosyltransferase is the enzyme that catalyzes the formation of adenine nucleotide from free adenine and PRPP (5-phosphoribosyl-1-pyrophosphate).
Answer:
13. An adaptation is any heritable trait that helps an organism, such as a plant or animal, survive and reproduce in its environment.
It's the increase in abnormal 'white blood cells'.
Hope this helps!
Functional residual capacity (FRC)is the volume of air that will remain in lungs after normal expiration.
Check for more information:
(https://en.m.wikipedia.org/wiki/Functional_residual_capacity
Functional residual capacity - Wikipedia)
The right option is; D Luster
If a mineral has a metallic shine to it, the luster of the mineral is being measured.
Luster is the property of a mineral which describes how the mineral reflects light, and also the dullness or brightness of the mineral. Luster is grouped into two which are; metallic and non-metallic. Minerals with a metallic luster are reflective and opaque. An example is pyrite. Non-metallic luster are also classified into groups based on how much light is reflected. The groups include pearly, dull, waxy, resinous, silky, and vitreous luster.