Biology Questions and Answers
by the union of one molecule of
galactose with one molecule of glucose.
- What are hexoses? What
are some examples of hexoses
with important biological
functions?
Hexoses are carbohydrates made of six
carbons. Glucose, fgalactose are examples oructose af hexoses.nd (^)
Hexoses have an important biological
role as emetabolism.nergy sources for the
- What are pentoses? What
are the roles of pentoses in
DNA and RNA molecules?
Pentoses are carbohydrates made of
five carbons.
The DNA molecsequence of moleculule is mades callede of a
nucleotides. Each nucleotide is formed
by the associationdeoxyribose with a phosphoric acid an of one pentose calledd
a nitrogen-containing base (A, T, C or
G). RNAnucleotid is also formed by a sequence ofes. The RNA nucleotides are
made by association of one ribose (a
pentose) with oone nitrogen-containing ne phosphoric acid anbase (A, U, C ord (^)
G).
So pentoses arcomponents of e fundamentalDNA and RNA.
- What are the main
biological functions of the
polysaccharides?
Polysaccharides havfunction and a structurale an energy storag function. e
Polysaccharides incorbeings along the food chain arporated by livinge
important sources of carbohydrates for
the energetic metabolismof the next trophic levels. of organisms
Starch is thenergy store polysaccharide by plants. Glycogee used forn is a (^)
macromolstorage of glucose in ecule responsible the liver andfor the
muscles. Chitin is a polysaccharide with
structural fuexoskeleton of the arthropods anctions that constitutesnd the the
cell wall in fungi.
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