Question

1a. Choose the false statement:

Group of answer choices

According to their absorption spectra, chlorophylls a and b are not able to absorb those wavelengths of light that coincide with green light.

The role of water in photosynthesis is to provide a source of electrons to replace those ejected from reaction center chlorophyll a when it is activated by light energy.

When the light reactions are completed (at the end of the Z-scheme), all the electrons excited by the sun will have been transferred into the bonds of ATP.

1b. Choose the false statement:

Group of answer choices

The reactions of glycolysis only manage to convert a small proportion of the energy contained in a glucose molecule into ATP; the majority of ATP is formed in the subsequent pathways found in the mitochondria.

Water and CO₂ are the final end-products of aerobic cellular respiration in animal tissues.

Water and CO₂ are the final end-products of anaerobic cellular respiration in animal tissues.

1c. Choose the false statement:

Group of answer choices

Cell respiration can be viewed as a rather efficient set of energy transfer reactions because almost 90% of the energy available in each molecule of glucose is actually converted into ATP.

The CO₂ formed during cellular respiration represents the inorganic breakdown products of the original glucose molecule.

Your muscle tissues are capable of performing anaerobic respiration (fermentation) because they contain the enzyme necessary to convert pyruvic acid into lactic acid.

Answer 1

1) The false statement is-

When the light reactions are completed (at the end of the Z-scheme), all the electrons excited by the sun will have been transferred into the bonds of ATP.

This is because at the end of the Z scheme of light reaction, the electrons excited by the sun will be transferred to ATP and NADPH.

2) The false statement is-

Water and CO2 are the final end-products of anaerobic cellular respiration in animal tissues.

This is because in anaerobic respiration the final products are lactic acid and ATP.

3) The false statement is-

Cell respiration can be viewed as a rather efficient set of energy transfer reactions because almost 90% of the energy available in each molecule of glucose is actually converted into ATP.

In cells, the efficiency of energy extraction from glucose is approximately 50%.