Question

Based on your table of results, list the part/step of photosynthesis being inhibited by each herbicide.1)H-1A) Photosystem II B) Chlorophyll Absorption C) Photosystem I D) Chlorophyll E) Calvin Cycle F) ATP SynthaseH-2A) Photosystem II B) Chlorophyll Absorption C) Photosystem I D) Chlorophyll E) Calvin Cycle F) ATP SynthaseH-3A) Photosystem II B) Chlorophyll Absorption C) Photosystem I D) Chlorophyll E) Calvin Cycle F) ATP SynthaseH-4A) Photosystem II B) Chlorophyll Absorption C) Photosystem I D) Chlorophyll E) Calvin Cycle F) ATP SynthaseH-5A) Photosystem II B) Chlorophyll Absorption C) Photosystem I D) Chlorophyll E) Calvin Cycle F) ATP Synthase

Answer 1

Herbicides can inhibit various parts of photosynthesis such as Photosystem II, chlorophyll absorption, Photosystem I, the Calvin Cycle, and ATP synthase, affecting the plant's ability to capture sunlight, produce energy carriers, and synthesize organic molecules from carbon dioxide.

Step-by-step explanation:

In photosynthesis, herbicides can target different parts of the process to inhibit plant growth. For instance, some herbicides may affect Photosystem II (PS II), which is responsible for the initial step of the light-dependent reactions, where water is split and oxygen is released. This process also helps in the creation of the energy carriers ATP and NADPH which are crucial for the later stages of photosynthesis.

Other herbicides might affect chlorophyll absorption, preventing the plant from capturing sunlight effectively, which is vital for the energy transfer within both photosystems. The inhibition of Photosystem I (PS I) would disrupt the production of NADPH, an important molecule for fixing carbon during the Calvin Cycle, whereas targeting the Calvin Cycle itself would prevent the plant from synthesizing glucose from carbon dioxide and the energy carriers ATP and NADPH.

If a herbicide were to affect ATP Synthase, it would inhibit the production of ATP during the light-dependent reactions, cutting off the energy supply needed for the Calvin Cycle and thus preventing the synthesis of organic molecules.

Answer 2

The question pertains to identifying which part of photosynthesis is being inhibited by specific herbicides, targeting processes like Photosystem II, Chlorophyll Absorption, Photosystem I, ATP Synthase, or the Calvin Cycle.

Step-by-step explanation:

The student's question appears to be about identifying which part of the photosynthesis process is being inhibited by different herbicides. Photosynthesis is essentially divided into two parts: the light-dependent reactions and the Calvin cycle (light-independent reactions). Herbicides can target specific parts of this process, such as Photosystem II, Chlorophyll Absorption, Photosystem I, ATP Synthase, or the Calvin Cycle.

Photosystem II (part A) is involved at the very start of photosynthesis where light is absorbed to initiate electron transport. Chlorophyll Absorption (part B) refers to the process by which chlorophyll pigments absorb sunlight. Photosystem I (part C) follows after Photosystem II and further contributes to electron transport and the formation of NADPH. ATP Synthase (part F) is a protein complex that uses the proton gradient created by the electron transport to generate ATP, the energy currency of the cell. Lastly, the Calvin Cycle (part E) is where ATP and NADPH are used to fix carbon dioxide, forming organic sugars.