AP BIOLOGY

LABORATORY REVIEW

CELL RESPIRATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
During photosynthesis in plants, what is the source of the carbon in the sugar molecule C6H12O6?
A
Carbon dioxide in air
B
Carbon monoxide in air
C
Carbon particles in the soil
D
Carbon particles in the water
Explanation: 

Detailed explanation-1: -During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil. Within the plant cell, the water is oxidized, meaning it loses electrons, while the carbon dioxide is reduced, meaning it gains electrons. This transforms the water into oxygen and the carbon dioxide into glucose.

Detailed explanation-2: -Plants make sugar by using energy from sunlight to transform carbon dioxide (CO2), a gas absorbed from the air, and water (H20) taken from the ground by roots into glucose (C6H12O6) and oxygen (O2). This process is called photosynthesis and occurs in the chloroplast of the plant cell.

Detailed explanation-3: -Importance of Glucose: Glucose is a single sugar that is important for energy production and creating new structures inside plant cells. Glucose is produced during photosynthesis and has the formula C6H12O6.

Detailed explanation-4: -The fixation of six carbon dioxide by six turns of the Calvin cycle facilitates the removal of one molecule of glucose from the pathway. Thus, the oxygen in glucose comes from carbon dioxide from the atmosphere.

Detailed explanation-5: -Glucose (C6H12O6) is one of the most important monosaccharides, which is synthesized during photosynthesis and serves as the ‘fuel’ and source of energy, stored as a polymer glycogen in animals and as starch in plants.

There is 1 question to complete.