Sergey Bylikin, Gary Horner and, Brian Murphy Solutions for Chapter: Biochemistry, Exercise 2: Questions

State the source of hydrogen in photosynthesis.

State the sources of oxygen in photosynthesis.

Determine the mass (in $\mathrm{g}$) of carbon dioxide required to produce $3.15 \mathrm{g}$ of glucose, ${\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6$.

Some bacteria can synthesize all the components of their cells from inorganic materials and sunlight, while humans and other animals are unable to do this and must obtain certain essential organic compounds from their diet. Discuss whether metabolic processes in these bacteria are more complex and sophisticated than the metabolism in our own bodies.

The following redox reactions represent the bacterial decomposition of organic waste under different conditions.

$$\begin{gathered} {\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6 +6{\mathrm{O}}_2 \to 6{\mathrm{CO}}_2 + 6{\mathrm{H}}_2\mathrm{O} \\ {\mathrm{CH}}_3{\mathrm{COO}}^{-}+{\mathrm{H}}_2\mathrm{O}\to {\mathrm{CH}}_4+{\mathrm{HCO}}_3^{-} \\ 2{\mathrm{CH}}_2\mathrm{O} + {\mathrm{SO}}_4^{2-} \to 2{\mathrm{CO}}_2 + {\mathrm{H}}_2\mathrm{S} + 2{\mathrm{OH}}^{-} \\ 2{\mathrm{CH}}_2\mathrm{O} + {\mathrm{O}}_2 +2{\mathrm{OH}}^{-} \to 2{\mathrm{HCOO}}^{-} + 2{\mathrm{H}}_2\mathrm{O} \end{gathered}$$

Identify the most likely environment (aerobic or anaerobic) for each reaction.

Explain the difference between hydrolysis and condensation reactions.

Complete and balance the following equation, and identify its reaction type (hydrolysis or condensation).

${\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6 \to \mathrm{H}–{\left({\mathrm{C}}_6{\mathrm{H}}_{10}{\mathrm{O}}_5\right)}_6–\mathrm{OH} + ......$

Determine the mass (in $\mathrm{g}$) of the inorganic product formed in the reaction,
${\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6 \to \mathrm{H}–{\left({\mathrm{C}}_6{\mathrm{H}}_{10}{\mathrm{O}}_5\right)}_6–\mathrm{OH} + {\mathrm{H}}_2\mathrm{O}$

If the mass of the biopolymer produced was $4.95 \mathrm{g}$.