In Figure 2 showing the cellular respiration equation (C6H12O6 + 6 O2 → 6 CO2 + 6 H2O + ATP & heat) with total bond energies, which relationship is NOT shown in the model? A) energy and matter flow through different levels of living things and between the living thing and the environment B) the model clearly shows all of these C) during cellular respiration, carbon-containing molecules are broken down and the atoms are rearranged to form new substances D) when chemical bonds are broken and new bonds are formed during cellular respiration, energy can be released
Cellular Respiration Equation with Chemical Structures and Total Bond Energy
Cellular Respiration
C6H12O6 Glucose + 6 O2 Oxygen → 6 CO2 Carbon dioxide + 6 H2O Water + Energy ATP & heat
-304.3 kcal/mol 0.0 kcal/mol -> -94.04 kcal/mol -> -68.3 kcal/mol
A) is NOT shown in the model. Figure 2 shows the reactants and products of cellular respiration, indicating atoms are rearranged (C) and that energy is released as ATP and heat due to bond changes (D). It does not show energy and matter flowing through different levels of living things or between an organism and the environment.
What the figure model is actually representing
Figure 2 is a chemical model of cellular respiration: it shows the reaction $$C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O + \text{energy (ATP and heat)}$$ It also includes total bond energy values for the substances, which is a hint that the diagram is focused on chemical energy changes.
Relationships you can read directly from the equation
Because the figure shows reactants turning into products, it shows that atoms are conserved but rearranged into new molecules. That matches:
- C) Carbon-containing molecules (glucose) are broken down and atoms are rearranged to form new substances ($CO_2$ and $H_2O$).
Because the products plus “ATP & heat” are shown, and bond energy values are provided, it also supports:
- D) Breaking and forming bonds during the reaction can release energy overall (captured in ATP and lost as heat).
What is NOT shown
Choice A) talks about energy and matter flow through different levels of living things and between the organism and the environment. Figure 2 does not include trophic levels, food webs, ecosystem arrows, or organism-environment exchange diagrams. It only models the chemical reaction inside cellular respiration.
Eliminating the remaining option
- B) (“the model clearly shows all of these”) cannot be true if A is not represented.
So the relationship NOT shown is A.
- Respiration That Produces Carbon Dioxide and Water
- Products of Cellular Respiration (CO2, H2O, ATP)
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