For each of the following polymers listed in Table below, indicate which of the
ID: 188452 • Letter: F
Question
For each of the following polymers listed in Table below, indicate which of the properties apply. More than one property can applied for an individual polymer.
Extracellular location
Glyosidic bond
Informational molecule
Peptide bond
Phosphodiester bond
Nucleotide triphosphate
Synthesis by condensation
Synthesis requires a template
Helical structure possible
Polymer
Properties that apply
Cellulose
Globular proteins
mRNA
DNA
Fibrous proteins
Polymer
Properties that apply
Cellulose
Globular proteins
mRNA
DNA
Fibrous proteins
Explanation / Answer
Ans. #I. Cellulose: Extracellular location, Glycosidic bond, synthesis by condensation
Cellulose is located outside the cell (the boundary of a cell is marked by its plasma membrane).
The glucose molecules are linked through glycosidic bond to form cellulose.
During polymerization, there is removal of one H2O molecule per glycosidic bonds formed. The process of polymerization by removal of a water molecule is called condensation.
# II. Globular proteins: Peptide bond, synthesis of condensation, synthesis requires a template, helical structure possible.
Globular proteins are heteropolymer of amino acids.
Water molecule is removed (condensation) during formation of peptide bond.
The synthesis of proteins require a template (mRNA).
The protein may consist of one of more alpha-helices. So, though the overall shape of a globular protein is oval or spherical, presence of a-helices may give appearance of localized helical structure in globular protein.
#III. mRNA: Information molecule, phosphodiester bond, nucleotide triphosphate, synthesis by condensation, synthesis requires a template,
#IV: DNA: Information molecule, phosphodiester bond, nucleotide triphosphate, synthesis by condensation, synthesis requires a template, helical structure possible (only to DNA but not to mRNA).
Both DNA and mRNA serve as information molecule. DNA serves as the primary information molecule from which genetic information flows to DNA, RNA and protein. From mRNA as information molecule, the genetic information is decoded in proteins.
Nucleotide triphosphate are the building block of DNA and mRNA.
The nucleotide phosphate monomers are linked by phosphodiester bond.
Water molecule is removed (condensation) during formation of phosphodiester bond.
DNA synthesis requires DNA as template.
RNA synthesis requires DNA as template.
DNA usually exist in helical form in the cell.
#V: Fibrous protein: Peptide bond, synthesis of condensation, synthesis requires a template, helical structure possible.
The whole fibrous proteins may take helical structure.
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