More carbon questions?

Question

8: As carbon chains to itself to form long structures, it most often undergoes a(n) ______ bond.
Ionic
Covalent
Nuclear
James


9: Amino acids chain together to form the next order of structure known as the:
Polypeptide
Protein
Nucleic acid
Enzyme


10: On earth, Carbon exists mostly as a(n) _______ quantity.
Mobile
Scarce
Stored
Undesired

Answer 1

8) Carbon bonds to itself through long COVALENT bonds.

9) Amino acids join together to form POLYPEPTIDES.

10) On earth Carbon exist mainly as a STORED quantity.(CO2(g), and in minerals as carbonates and in petroleum and coal).

Answer 2

8. Covalent bonding. When carbon forms chains, it bonds to itself, and an element bonding to itself must be covalent.

9. Polypeptide. For more information see:

http://en.wikipedia.org/wiki/Peptide

When a polypeptide has more than 50 amino acid residues, it is usually considered a "protein".


10. Stored quantity. For more information, see the carbon cycle diagram at:

http://www.grida.no/climate/vital/13.htm


The largest store of carbon is fixed in marine sediments and sedimentary rocks, and this is much larger than the portion of carbon that regularly cycles among land, air, and water.

Answer 3

8. Covalent
9. polypeptide
10. Scarce, comparatively- bearing in mind the rocks are mostly made of silicon and oxygen.

Answer 4

8. covalent
9. polypeptide
10. stored

Answer 5

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