Atomic mass is determined by the number of protons plus the number of neutrons
<h2>Scurvy </h2>
Explanation:
(a) Collagen is the major structural component of cartilage,bones and tendons
- The basic unit of collagen is tropocollagen and each tropocollagen consists of three coiled left handed polypeptide chains called α chains
- Generally each α chain consists of a repeating tripeptide sequence called: G-X-Y
- Here G represents glycine; X represents proline and Y represents hydroxyproline
- Rigidity of collagen molecule is due to presence of proline and hydroxyproline
- Hydroxylation of proline is catalysed by prolyl hydroxylase enzyme which use ascorbate,α ketoglutarate and oxygen
- α ketoglutarate is oxidatively decarboxylated to form carbon dioxide and succinate
- Sequence of events leading from a dietary vitamin C deficiency to symptoms such as bruising and breakdown of supporting tissues includes: tissue levels of ascorbic acid is low; enzyme prolyl hydroxylase is inactive; proline is not hydroxylated; the triple helix is inadequately stabilized; collagen breaks down; defects in tissues that depend on collagen
; tissues that depend on collagen are subject to breakdown and bruising
(b) Sailors are no longer susceptible to scurvy because fresh fruits which are the source of vitamin C source are available now
British sailors called "limeys" to this day,this term reflects the British navy's use of limes
Plants use and produce both oxygen and carbon dioxide.
Increases genetic variation, which in and of itself has extreme benefits such as protection against disease, capability to evolve, etc
Answer:
The answer to your question is:
Explanation:
When carbon attached to oxygen, they form covalent bonds, in these kind of bonds, atoms share electrons to acquire stability.
Atoms acquire stability when they have 8 electrons in their outermost shell.
When carbon share electrons with oxygen they acquire 8 electrons and they are stable.
See the picture below
Red is carbon and blue oxygen
