Question

Plants are best known for their ability to perform photosynthesis, the process by which light energy is converted to chemical energy in the form of sugars. but plants don't just make sugars; they use them, too. like animals, plants must break sugars down to fuel cellular work. in this activity, you will complete a concept map showing the interrelatedness of sugar production and sugar breakdown in a plant cell.part a - photosynthesis and respiration in plants drag the labels from the left to their correct locations in the concept map on the right. not all labels will be used.

Answer 1

You car see the full concept map below.

Plants perform photosynthesis. They use the sunlight, that provides them with energy, and take the carbon dioxide from the atmosphere.

The main role of chloroplasts is to conduct photosynthesis.
They have chlorophyll, which is a green pigment that captures the energy from sunlight.


Photosynthesis  is a way for them to make their own food (sugars), necessary for them to stay alive and to produce oxygen.  Both will be needed for their cellular respiration, a process that occurs in the mitochondria, and will produce energy, in the form of ATP, and CO2.

The carbon dioxide that they produced can be used for doing photosynthesis.

Answer 2

The plant utilizes solar energy to synthesize their food in sugar form and further utilize these sugars in the dark reaction to produce ATP, the energy storage form.

Further Explanation:

The plants absorbes light energy because of the presence of chlorophyll and convert it into chemical energy. The activated chlorophyll molecule helps in the electron transfer from one acceptor to another forming a chain.

The first phase of photosynthesis the light-dependent reaction in which the absorbed light is utilized to produce molecules carrying energy that is used in the second phase to form carbohydrates by reducing carbon dioxide. The first phase occurs in the grana region of the chloroplast and involves the transport of electrons through photosystem II (PS II) followed by photosystem I (PS I). The energy gained by the chlorophyll molecule is transferred to PS II in the form of electrons. These electrons are passed on further through a series of electron transporter or carrier from PS II to PS I. In photosystem I, finally, the electron is gained by NADP+ to form NADPH.

As the electrons travel along the electron transport chain, energy is released which helps in the pumping of protons (H+ ions) into the lumen from the stroma through the thylakoid membrane. A proton gradient is developed which allows the movement of protons back to the stroma which in turn results in the formation of ATP through membrane-bound ATP synthase.

The dark reaction or the light-independent reaction happens in the stroma and utilizes the products formed during the light-dependent phase. During the dark reaction, the carbon dioxide (CO2) is incorporated into the plants to form carbohydrates which involve the utilization of NADPH and ATP. This occurs through the Calvin cycle in which Ribulosebisphosphate (RuBP) and CO2 combine together to form phosphoglycerate. This is followed by conversion of phosphoglycerate into two triose phosphate molecules which requires ATP. Some of the triose phosphates are recycled back into RuBP while some are used for glucose production. Oxygen is also produced during this process as a byproduct and exits into the atmosphere through the leaves.  

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Answer Details:

Grade: Higher school

Subject: Biology

Chapter: Photosynthesis

Keywords: Photosynthesis, light-dependent reacts, light-independent reactions, dark reactions, chlorophyll, grana, stroma. Proton gradient, Calvin cycle, glucose, carbohydrates, PS I, PS II, electron transport chain, ATP, ATP synthase, NADPH.