Question

part a
which of these processes allows carbon, hydrogen, and oxygen to form sugar molecules that can be combined later with other elements to form larger carbon - based molecules, such as amino acids?
a photosynthesis
b hydrolysis
c cellular respiration
d fermentation

Explanation:

• Photosynthesis: Plants use carbon dioxide (\(CO_2\)), water (\(H_2O\)), and sunlight to produce glucose (\(C_6H_{12}O_6\), a sugar molecule). Glucose can then be used as a building - block to form more complex carbon - based molecules. For example, glucose can be modified and combined with other elements (like nitrogen in the case of amino acids synthesis, where carbon - skeletons from glucose - related pathways are used).
• Hydrolysis: This is a reaction that breaks down molecules by adding water. It does not form sugar molecules from carbon, hydrogen, and oxygen in the way described.
• Cellular respiration: It is the process of breaking down glucose (or other organic molecules) to release energy (\(C_6H_{12}O_6+6O_2

ightarrow6CO_2 + 6H_2O+\text{energy}\)). It is a catabolic process, not a process for forming sugar molecules.

• Fermentation: It is an anaerobic process that breaks down organic molecules (like glucose) to produce smaller molecules (such as ethanol and \(CO_2\) in alcoholic fermentation or lactic acid in lactic acid fermentation). It is also a catabolic process.

Answer:

A. Photosynthesis