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Eric K.
Private Tutor in Chemistry (high school to senior level physical chemistry) since 2004.
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Chemistry
TutorMe
Question:

__ C3H6(OH)2 + __ O2 --> __CO2 + __H2O Type of Reaction? Balance?

Eric K.
Answer:

First balance the Carbons. Then balance the Hydrogens. Save Oxygen for last as it is present it its elemental state, thus allowing easy balancing using fractions of O2 if necessary (here it is not). C3H6(OH)2 + 4 O2 --> 3 CO2 + 4 H2O Combustion Reaction. Heat should also be a product.

Biochemistry
TutorMe
Question:

Describe the chemical interactions and their role in nucleobase pairing in DNA?

Eric K.
Answer:

Structurally protect the nucleobases in an efficient package. H-bond between nucleobases align them inside the hydrophobic core of the double helix, which is reinforced and stabilized by the pi-stacking interactions between neigboring base pairs of purines and pyrimidines.

Biology
TutorMe
Question:

What is the biological role nucleobase pairing in DNA?

Eric K.
Answer:

The chemical interaction of nucleobases pairing in DNA is to retain information/data. Nucleobases are the lowest level of information storage in biology. Without a robust and proof readable system of storage and replication, then rapid and uncontrollable mutant would render an organism non-viable. DNA Transcription --> RNA Translation --> Protein --> Trait

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