Ap Biology Ch 8 Photosynthesis Review Answer Key

22 .

What are the roles of ATP and NADPH in photosynthesis?

1. ATP and NADPH are forms of chemical free energy produced from the light dependent reactions to exist used in the lite contained reactions that produce sugars.

2. ATP and NADPH are forms of chemic energy produced from the light independent reactions, to be used in the light dependent reactions that produce sugars.

3. ATP and NADPH are forms of chemical energy produced from the calorie-free dependent reactions to be used in the lite independent reactions that produce proteins.

4. ATP and NADPH are forms of chemic energy produced from the light dependent reactions to be used in the lite contained reactions that use sugars equally reactants.

23 .

Place the stages of photosynthesis and the connections betwixt those stages. Applying this noesis, what is the overall consequence of the light-dependent reactions in photosynthesis?

1. NADPH and ATP molecules are produced during the light-contained reactions and are used to ability the low-cal-dependent reactions.

2. Carbohydrate and ATP are produced during the light-dependent reactions and are used to power the low-cal-independent reactions.

3. Carbon dioxide and NADPH are produced during the low-cal-independent reactions and are used to power the low-cal-dependent reactions.

4. NADPH and ATP molecules are produced during the lite-dependent reactions and are used to ability the calorie-free-independent reactions.

24 .

Examine the analogy of the photosynthesis equation. How does the equation chronicle to both photosynthesis and cellular respiration, and what is the connection between the two processes?

1. Photosynthesis utilizes free energy to build carbohydrates, while cellular respiration metabolizes carbohydrates.

2. Photosynthesis utilizes energy to metabolize carbohydrates, while cellular respiration builds carbohydrates.

3. Photosynthesis and cellular respiration both apply carbon dioxide and water to produce carbohydrates.

4. Photosynthesis and cellular respiration both metabolize carbohydrates to produce carbon dioxide and water.

25 .

How is the energy from the dominicus transported within chloroplasts? Support your answer with details of the processes involved.

1. When photons strike photosystem (PS) I, pigments laissez passer the low-cal energy to chlorophyll, molecules that excite electrons, which are then passed to the electron transport chain. The cytochrome complex then transfers protons across the thylakoid membrane and transfers electrons from PS-2 to PS-I. The products of the light-dependent reaction are used to power the Calvin cycle to produce glucose.

2. When photons strike photosystem (PS) II, pigments laissez passer the light energy to chlorophyll a molecules that in plough excite electrons, which are and so passed to the electron transport chain. The cytochrome complex transfers protons across the thylakoid membrane and transfers electrons from PS-I to PS-II. The products of the low-cal-dependent reaction are used to power the Calvin cycle to produce glucose.

3. When photons strike photosystem (PS) II, pigments laissez passer the light energy to chlorophyll a molecules that excite electrons, which are then passed to the electron ship chain. The cytochrome circuitous transfers protons across the thylakoid membrane and transfers electrons from PS-II to PS-I. The products of the calorie-free-dependent reaction are used to power the Calvin cycle to produce glucose.

4. When photons strike photosystem (PS) Two, pigments pass the low-cal free energy to chlorophyll a molecules that excite electrons, which are then passed to the electron transport chain. The cytochrome complex transfers protons across the thylakoid membrane and transfers electrons from PS 2 to PS I. The products of the light-contained reaction are used to power the Calvin cycle to produce glucose.

26 .

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Review the many types of electromagnetic radiations as pictured on the electromagnetic spectrum. Why are X-rays and ultraviolet (UV) light wavelengths dangerous to living tissues?

1. Because UV rays and X-rays are high-energy waves, they penetrate the tissues and thus damage cells.

2. Considering UV rays and 10-rays are long-wavelength waves, they penetrate the tissues and thus damage cells.

3. Because UV rays and X-rays are depression-free energy waves, they cannot penetrate tissues and thus damage cells.

4. Considering UV rays and 10-rays are low-frequency waves, they can penetrate tissues and thus damage cells.

27 .

If a constitute were to be exposed to only cherry calorie-free, would photosynthesis be possible?

1. Photosynthesis does not take identify.

2. The rate of photosynthesis increases sharply.

3. The rate of photosynthesis decreases drastically.

4. The rate of photosynthesis decreases and and then increases.

28 .

Applying your understanding of how processes of photosynthesis are connected, select the all-time description of the electron transfer pathway from photosynthesis II to photosynthesis I in the light-dependent reactions.

1. After splitting water in PS-I, high-energy electrons are delivered through the chloroplast electron transport chain to PS-2.

2. After the photosynthesis reaction, released products like glucose help in the transfer of electrons from PS-Ii to PS-I.

3. Later splitting water in PS-2, high-energy electrons are delivered through the chloroplast electron ship chain to PS-I.

4. Afterward the completion of the light-dependent reactions, the electrons are transferred from PS-II to PS-I.

29 .

Based on your understanding of the process of photosynthesis, predict what volition happen to a plant leafage that loses CO₂ likewise apace.

1. This event will have no effect on the rate of photosynthesis in the leaf.

2. Photosynthesis in the leaf will slow down or possibly stop.

3. Photosynthesis in the leaf will increase exponentially.

4. Photosynthesis in the leaf volition first decrease and so increment.

30 .

Carbon, in the form of CO₂, must be taken from the atmosphere and fastened to an existing organic molecule in the Calvin wheel. Therefore, the carbon is bound to the molecule. The products of the cycle simply occur because of the added carbon. What are the products of the Calvin bicycle and what is regenerated?

1. The product of the Calvin cycle is glyceraldehyde-iii phosphate and RuBP is regenerated.

2. The production of the Calvin bike is glyceraldehyde-iii phosphate and RuBisCO is regenerated.

3. The product of the Calvin cycle is a 3-PGA molecule and glyceraldehyde-3 phosphate is regenerated.

4. The production of the Calvin bike is glyceraldehyde-3 phosphate and oxygen is regenerated.

31 .

An inadequate supply of water can compromise plants' aibility to carry out photosynthesis. How do desert plants forestall such water loss when they are subjected to loftier heat?

1. past using CAM photosynthesis and past endmost stomatal pores during the dark

2. by using CAM photosynthesis and past opening stomatal pores during the dark

3. past using CAM photosynthesis and past keeping stomatal pores airtight at all times

4. by bypassing CAM photosynthesis and by keeping stomatal pores closed at night

32 .

Carnivores, such as lions, are dependent on photosynthesis to survive. Considering the organisms and processes involved in carrying out photosynthesis, provide the reasoning to explain why this is the case.

1. The prey of lions are generally herbivores, which depend on heterotrophs.

2. The casualty of lions are mostly smaller carnivorous animals, which depend on non-photosynthetic organisms.

3. The prey of lions are generally herbivores, which depend on autotrophs.

4. The prey of lions are mostly autotrophs, which depend onother autotrophs.

33 .

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Interpret the reactions of the Calvin bicycle equally pictured. Why does it take three turns of the Calvin cycle to produce G3P, the initial production of photosynthesis?

1. Information technology takes three turns to fix enough oxygen to export 1 G3P molecule.

2. Information technology takes three turns to produce RuBisCO as an end product.

3. It takes three turns to produce ATP and NADPH for fixation of G3P.

4. Information technology takes three turns to fix enough carbon to consign ane G3P molecule.

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Source: https://openstax.org/books/biology-ap-courses/pages/8-critical-thinking-questions

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