Early investigators assumed the oxygen created by photosynthetic plants come from carbon dioxide. In fact, it originates from _____.

You are watching: The final electron acceptor associated with photosystem i is _____.

A) water

B) glucose

C) air

D) electrons from NADPH


If photosynthesizing green algae are detailed with CO2 containing heavy oxygen (18O), later analysis will present that every one of the following molecules created by the algae contain 18O other than _____.

A) glyceraldehyde 3-phosphate (G3P)

B) glucose

C) ribulose bisphosphate (RuBP)

D) O2


Every ecosystem must have _____.

A) autotrophs and heterotrophs

B) producers and primary consumers

C) photosynthesizers

D) autotrophs


When oxygen is released together a an outcome of photosynthesis, that is a direct by-product the _____.

A) dividing water molecules

B) chemiosmosis

C) the electron transfer mechanism of photosystem I

D) the electron transfer mechanism of photosystem II


Which of the complying with statements is a correct difference between autotrophs and also heterotrophs?

A) cellular respiration is unique to heterotrophs.

B) just heterotrophs have mitochondria.

C) Autotrophs, yet not heterotrophs, have the right to nourish themselves start with CO2 and other nutrient that space inorganic.

D) only heterotrophs need oxygen.


C) Autotrophs, yet not heterotrophs, have the right to nourish themselves beginning with CO2 and other nutrient that space inorganic.


The number shows the absorb spectrum for chlorophyll a and the activity spectrum for photosynthesis. Why are they different?

A) Green and yellow wavelengths inhibit the absorb of red and also blue wavelengths.

B) Oxygen given off during photosynthesis interferes through the absorption of light.

C) other pigments absorb irradiate in addition to chlorophyll a.

D) Aerobic bacteria take it up oxygen, which changes the measurement of the price of photosynthesis.


What wavelength of light in the figure is most efficient in steering photosynthesis?

A) 420 mm

B) 575 mm

C) 625 mm

D) 730 mm


Theodor W. Engelmann illuminated a filament of algae v light the passed v a prism, hence exposing different segments of birds to various wavelengths that light. He included aerobic bacteria and then detailed in which locations the bacteria congregated. He detailed that the largest groups were discovered in the areas illuminated by the red and also blue light.

What go Engelmann conclude around the congregation of bacteria in the red and blue areas?

A) Bacteria congregated in these locations due to boost in the temperature of the red and blue light.

B) Bacteria congregated in these areas because these areas had the most oxygen gift released.

C) Bacteria space attracted come red and also blue light and also thus these wavelengths are more reactive than various other wavelengths.

D) Bacteria congregated in these areas due to rise in the temperature brought about by boost in photosynthesis.


B) Bacteria congregated in these locations because these locations had the many oxygen being released.


12

Theodor W. Engelmann illuminated a filament that algae with light that passed v a prism, thus exposing different segments of birds to various wavelengths the light. He added aerobic bacteria and then listed in which areas the bacteria congregated. He provided that the largest teams were discovered in the locations illuminated by the red and blue light.

An result of Engelmann"s experiment was to help determine the relationship in between _____.

A) wavelength of light and also the rate of aerobic respiration

B) wavelengths of light and the lot of heat released

C) wavelengths of light and the price of photosynthesis

D) the concentration the carbon dioxide and also the rate of photosynthesis


C) wavelengths of light and also the price of photosynthesis


13

A spaceship is designed to support animal life for a multiyear trip to the outer planets the the solar system. Plants will certainly be get an impressive to provide oxygen and also to recycle carbon dioxide. Since the spaceship will be too far from the sun for photosynthesis, an synthetic light resource will it is in needed.

What wavelength of light should be used to maximize plant development with a minimum of energy expenditure?

A) full-spectrum white light

B) environment-friendly light

C) a mixture of blue and also red light

D) UV light


C) a mixture that blue and red light


14

A spaceship is designed to support pet life because that a multiyear trip to the external planets that the solar system. Plants will be get an impressive to administer oxygen and also to recycle carbon dioxide. Since the spaceship will be too much from the sun for photosynthesis, an artificial light source will be needed.

Suppose a plant has actually a distinctive photosynthetic pigment and the pipeline of this plant show up to be reddish yellow. What wavelength of visible light are soaked up by this pigment?

A) red and also yellow

B) blue and violet

C) green and also yellow

D) blue, green, and also red


B) blue and violet


15

Halobacterium has a photosynthesis membrane that appears purple. Its photosynthetic action spectrum is the inverse of the activity spectrum for green plants. (That is, the Halobacterium action spectrum has actually a top where the eco-friendly plant activity spectrum has a trough.) What wavelengths of light do the Halobacterium photosynthetic colours absorb?

A) red and also yellow

B) blue, green, and red

C) green and also yellow

D) blue and also red


C) green and yellow


16

Why room there several structurally different pigments in the reaction centers the photosystems?

A) Excited electrons need to pass through number of pigments prior to they can be transferred to electron acceptors that the electron transport chain.

B) This arrangement allows the tree to absorb light power of a variety of wavelengths.

C) They allow the plant to absorb an ext photons from irradiate energy, every one of which are at the very same wavelength.

D) They permit the reaction center to excite electron to a greater energy level.


B) This arrangement permits the tree to absorb light energy of a variety of wavelengths.


17

If pigments native a particular varieties of plant are extracted and also subjected to document chromatography, which of the adhering to is most likely?

A) record chromatography for the plant would isolate a solitary band the pigment that is characteristic of that details plant.

B) file chromatography would different the pigments native a specific plant into several bands.

C) The isolated pigments would be some shade that green.

D) file chromatography would isolate only the pigments the reflect environment-friendly light.


B) paper chromatography would different the pigments native a particular plant into several bands.


18

In autumn, the pipeline of deciduous trees change colors. This is since chlorophyll is degraded and _____.

A) carotenoids and also other pigments space still existing in the leaves

B) the degraded chlorophyll transforms into numerous other colors

C) water it is provided to the leaves has actually been reduced

D) sugars are sent to most of the cells of the leaves


A) carotenoids and also other pigments space still present in the leaves


19

What event accompanies power absorption through chlorophyll (or other pigment molecule of the antenna complex)?

A) ATP is synthesized indigenous the energy absorbed.

B) A carboxylation reaction of the Calvin cycle occurs.

C) Electrons space stripped indigenous NADPH.

D) an electron is excited.


D) one electron is excited.


20

As electrons are passed v the device of electron carriers associated with photosystem II, they shed energy. What happens to this energy?

A) it excites electrons of the reaction center of photosystem I.

B) the is lost as heat.

C) that is offered to establish and maintain a proton gradient.

D) the is provided to phosphorylate NAD+ to NADPH, the molecule the accepts electron from photosystem I.


C) the is offered to establish and also maintain a proton gradient.


21

The last electron acceptor linked with photosystem ns is _____.

A) oxygen

B) water

C) NADP

D) NADPH


C) NADP


22

The electrons of photosystem II room excited and transferred come electron carriers. Indigenous which molecule or structure execute the photosystem II replacement electron come?

A) the electron carrier, plastocyanin

B) photosystem I

C) water

D) oxygen


C) water


23

In the thylakoid membranes, the pigment molecule in a light-harvesting complex _____.

A) separation water and also release oxygen native the reaction-center chlorophyll

B) absorb and transfer light energy to the reaction-center chlorophyll

C) synthesize ATP indigenous ADP and also i

D) move electrons come ferredoxin and also then NADPH


B) absorb and transfer light energy to the reaction-center chlorophyll


24

Which that the following are directly associated with photosystem I?

A) receiving electrons from the thylakoid membrane electron transport chain

B) generation of molecule oxygen

C) exploit of hydrogen electrons from the dividing of water

D) passing electron to the cytochrome complex


A) receiving electrons from the thylakoid membrane electron transfer chain


25

Some photosynthetic organisms contain chloroplast that lack photosystem II, yet space able to survive. The best way to recognize the absence of photosystem II in these organisms would be to _____.

A) recognize if they have actually thylakoids in the chloroplasts

B) test for liberation the O2 in the light

C) test for CO2 permanent in the dark

D) carry out experiments to generate an action spectrum


B) test for liberation the O2 in the light


26

What are the assets of direct electron flow?

A) heat and also fluorescence

B) ATP and also P700

C) ATP and NADPH

D) ADP and also NADP+


C) ATP and also NADPH


27

As a study scientist, you measure the amount of ATP and NADPH consumed by the Calvin bicycle in 1 hour. You find that 30,000 molecules of ATP were consumed, but only 20,000 molecules of NADPH were consumed. Where did the extra ATP molecule come from?

A) photosystem II

B) photosystem I

C) cyclic electron flow

D) direct electron flow


C) cyclic electron flow


28

Assume a optical membrane is somehow punctured so that the inner of the thylakoid is no longer separated native the stroma. This damage will most directly impact the _____.

A) dividing of water

B) circulation of electrons from photosystem II to photosystem I

C) synthesis of ATP

D) palliation of NADP+


C) synthetic of ATP


29

In a plant cell, where room the ATP synthase complexes located?

A) thylakoid membrane only

B) within mitochondrial membrane only

C) thylakoid membrane and inner mitochondrial membrane

D) optical membrane membrane and also plasma membrane


C) optical membrane membrane and inner mitochondrial membrane


30

In mitochondria, chemiosmosis moves protons indigenous the matrix into the intermembrane space, whereas in chloroplasts, chemiosmosis moves protons indigenous the _____.

A) matrix to the stroma

B) stroma come the thylakoid space

C) intermembrane an are to the matrix

D) thylakoid space to the stroma


B) stroma to the thylakoid space


31

Which of the following statements finest describes the relationship between photosynthesis and also respiration?

A) Respiration operation the biochemical pathways that photosynthesis in reverse.

B) Photosynthesis stores power in complex organic molecules; respiration releases energy from facility organic molecules

C) Photosynthesis occurs only in plants; respiration occurs just in animals.

D) Photosynthesis is catabolic; respiration is anabolic.


B) Photosynthesis stores energy in complicated organic molecules; respiration releases power from complex organic molecules


32

In photosynthetic cells, synthesis of ATP by the chemiosmotic device occurs throughout _____.

A) photosynthesis only

B) respiration only

C) photosynthesis and also respiration

D) no photosynthesis nor respiration


C) photosynthesis and also respiration


33

Carbon dioxide is break-up to form oxygen gas and also carbon compounds _____.

A) throughout photosynthesis

B) during respiration

C) throughout photosynthesis and also respiration

D) in neither photosynthesis no one respiration


D) in no photosynthesis no one respiration


34

What is the relationship in between the wavelength that light and the quantity of power per photon?

A) They have actually a direct, straight relationship.

B) They room inversely related.

C) They are logarithmically related.

D) they are different phenomena.


B) They room inversely related.


35

P680+ is claimed to it is in the strongest organic oxidizing agent. Provided its function, why is this necessary?

A) it is the receptor for the many excited electron in one of two people photosystem the photosynthesis.

B) it is the molecule that transfers electron to plastoquinone (Pq) of the electron deliver system.

C) It move its electrons to reduce NADP+ come NADPH.

D) it obtains electrons from the oxygen atom in a water molecule, so the must have actually a stronger attraction because that electrons 보다 oxygen has.


D) the obtains electron from the oxygen atom in a water molecule, so the must have a stronger attraction because that electrons 보다 oxygen has.


36

Carotenoids are often uncovered in foods items that are considered to have antioxidant nature in human being nutrition. What related function do they have in plants?

A) They offer as accessory colors to boost light absorption.

B) castle protect against oxidative damage from extreme light energy.

C) lock shield the sensitive chromosomes of the tree from harmful ultraviolet radiation.

D) they reflect orange light and enhance red light absorption by chlorophyll.


B) lock protect against oxidative damages from extreme light energy.


37

In a plant, the reaction that develop molecular oxygen (O2) take place in _____.

A) the light reactions alone

B) the Calvin bike alone

C) the irradiate reactions and also the Calvin cycle

D) no the light reactions no one the Calvin cycle


A) the light reactions alone


38

The buildup of cost-free oxygen in Earth"s atmosphere started with the beginning of _____.

A) life and also respiratory metabolism

B) cyanobacteria using photosystem II

C) chloroplasts in photosynthetic eukaryotic bio algae

D) floor plants


B) cyanobacteria utilizing photosystem II


39

In that is mechanism, photophosphorylation is most similar to _____.

A) substrate-level phosphorylation in glycolysis

B) oxidative phosphorylation in to move respiration

C) the Calvin cycle

D) palliation of NADP+


B) oxidative phosphorylation in cellular respiration


40

Which procedure is most straight driven by light energy?

A) production of a pH gradient by pump protons across the thylakoid membrane

B) carbon fixation in the stroma

C) reduction of NADP+ molecules

D) removed of electron from chlorophyll molecules


D) removed of electron from chlorophyll molecules


41

A gardener is concerned that she greenhouse is gaining too warm from too much light and also seeks to shade her plants with colored translucent plastic sheets, the shade of which enables passage of just that wavelength. What color should she use to reduce in its entirety light energy yet still maximize plant growth?

A) green

B) blue

C) orange

D) any kind of color will work-related equally well.


B) blue


42

A flask comprise photosynthetic eco-friendly algae and also a control flask containing water v no algae space both inserted under a financial institution of lights, i beg your pardon are set to cycle in between 12 hrs of light and also 12 hours of dark. The liquified oxygen concentration in both flasks are monitored. Predict what the relative liquified oxygen concentrations will be in the flask with algae contrasted to the control flask. The dissolved oxygen in the flask through algae will certainly _____.

A) always be higher

B) always be lower

C) be greater in the light, but the exact same in the dark

D) be higher in the light, however lower in the dark


D) be higher in the light, but lower in the dark


43

Which of the following are products of the light reactions the photosynthesis that space utilized in the Calvin cycle?

A) CO2 and also glucose

B) H2O and also O2

C) ADP, i, and also NADP+

D) ATP and also NADPH


D) ATP and also NADPH


44

Where walk the Calvin cycle take place?

A) stroma that the chloroplast

B) thylakoid membrane

C) interior of the thylakoid (thylakoid space)

D) outer membrane that the chloroplast


A) stroma the the chloroplast


45

What is the primary function of the Calvin cycle?

A) usage NADPH to relax carbon dioxide

B) separation water and release oxygen

C) transport RuBP out of the chloroplast

D) synthesize simple sugars indigenous carbon dioxide


D) synthesize straightforward sugars native carbon dioxide


46

In the procedure of carbon fixation, RuBP attaches a CO2 to develop a six-carbon molecule, i m sorry is then separation to produce two molecules of 3-phosphoglycerate. After ~ phosphorylation and also reduction produces glyceraldehyde 3-phosphate (G3P), what more needs to happen to finish the Calvin cycle?

A) enhancement of a pair of electron from NADPH

B) regeneration of ATP from ADP

C) rejuvenation of RuBP

D) renewal of NADP+


C) renewal of RuBP


47

Refer come the figure. If the carbon atom of every of the just arrived CO2 molecule is labeled through a radioactive isotope of carbon, which organic molecules will certainly be radioactively labeling after one cycle?

A) C only

B) B, C, D, and E

C) C, D, and E only

D) B and C only


B) B, C, D, and also E


48

Refer to the figure. To identify the molecule the accepts CO2, Calvin and Benson manipulated the carbon-fixation cycle by one of two people cutting off CO2 or cutting turn off light from societies of photosynthesis algae. They climate measured the concentration of miscellaneous metabolites immediately following the manipulation. Just how would this experiments aid identify the CO2 acceptor?

A) The CO2 acceptor concentration would certainly decrease once either the CO2 or irradiate are reduced off.

B) The CO2 agree concentration would increase when one of two people the CO2 or irradiate are cut off.

C) The CO2 agree concentration would boost when the CO2 is reduced off, yet decrease when the light is cut off.

D) The CO2 acceptor concentration would certainly decrease once the CO2 is cut off, but increase as soon as the irradiate is cut off.


C) The CO2 acceptor concentration would rise when the CO2 is cut off, however decrease when the irradiate is reduced off.


49

Which of the complying with sequences correctly represents the circulation of electrons throughout photosynthesis?

A) NADPH → O2 → C O2

B) H2O → NADPH → Calvin cycle

C) NADPH → chlorophyll → Calvin cycle

D) NADPH → electron deliver chain → O2


B) H2O → NADPH → Calvin cycle


50

Which that the adhering to does not occur throughout the Calvin cycle?

A) oxidation of NADPH

B) relax of oxygen

C) rejuvenation of the CO2 acceptor

D) consumption of ATP


B) release of oxygen


51

What compound gives the reducing power for Calvin bike reactions?

A) ATP

B) NADH

C) NADP+

D) NADPH


D) NADPH


52

What would certainly be the expected impact on tree if the atmospheric CO2 concentration to be doubled?

A) every plants would certainly experience raised rates of photosynthesis.

B) C3 plants would have faster growth; C4 plants would be minimally affected.

C) C4 plants would certainly have much faster growth; C3 plants would certainly be minimally affected.

D) C3 plants would certainly have faster growth; C4 plants would have actually slower growth.


B) C3 plants would certainly have much faster growth; C4 plants would be minimally affected.


53

Why room C4 tree able come photosynthesize with no apparent photorespiration?

A) They perform not get involved in the Calvin cycle.

B) They use PEP carboxylase to originally fix CO2.

C) They maintain water an ext efficiently.

D) lock exclude oxygen from their tissues.


B) They usage PEP carboxylase to initially fix CO2


54

CAM plants keep stomata closed in the daytime, thus reducing loss of water. They have the right to do this due to the fact that they _____.

A) fix CO2 right into organic acids throughout the night

B) settle CO2 into sugars in the bundle-sheath cells

C) solve CO2 into pyruvate in the mesophyll cells

D) usage photosystem I and also photosystem II at night


A) settle CO2 into organic acids during the night


55

The different pathways of photosynthesis utilizing the C4 or video camer systems are stated to be compromises. Why?

A) each one minimizes both water loss and rate the photosynthesis.

B) C4 compromises ~ above water loss and also CAM compromises top top photorespiration.

C) Both minimize photorespiration yet expend more ATP throughout carbon fixation.

D) camer plants allow more water loss, if C4 plants allow less CO2 right into the plant.


C) Both minimization photorespiration however expend much more ATP during carbon fixation.


56

If plant gene alterations reason plants to be deficient in photorespiration, what would most more than likely occur?

A) Photosynthetic effectiveness would be lessened at short light intensities.

B) cell would bring on the Calvin cycle in ~ a much slower rate.

C) There would certainly be an ext light-induced damage to the cells.

D) much less oxygen would certainly be produced.


C) There would be an ext light-induced damage to the cells.


57

Compared come C3 plants, C4 plants _____.

A) can continue to resolve CO2 even at lower CO2 concentration and greater oxygen concentrations

B) have higher rates that photorespiration

C) execute not usage rubisco for carbon fixation

D) do a four-carbon compound, oxaloacetate, i beg your pardon is then delivered to the citric acid cycle in mitochondria


A) can continue to solve CO2 even at lower CO2 concentrations and greater oxygen concentrations


58

Which that the complying with statements is true concerning the accompanying figure?

A) It represents a C4 photosynthetic system.

B) It represents an adaptation that maximizes photorespiration.

C) It represents a C3 photosynthesis system.

D) It to represent a cam photosynthetic system.


A) It represents a C4 photosynthesis system.


59

Referring to the accompanying figure, oxygen would certainly inhibit the CO2 fixation reactions in _____.

A) cell i only

B) cabinet II only

C) no cell i nor cell II

D) both cell I and also cell II


B) cell II only


60

Photorespiration _____.

A) generates carbon dioxide and consumes ATP and oxygen

B) generates ATP and sugars and consumes oxygen and also carbon dioxide

C) generates oxygen and also consumes ATP, carbon dioxide, and sugars

D) spend carbon dioxide and generates ATP, sugars, and also oxygen


A) generates carbon dioxide and also consumes ATP and oxygen


61

Students conducted an experiment to determine the result of light intensity top top the rate of photosynthesis. They punched 40 leaf disks native spinach leaves and used a syringe partially filled through water to traction the gases native the sheet disks so that all sheet disks sunk to the bottom of the syringe. Ten (10) sheet disks indigenous the syringe were put in each of four cups and covered through 50 ml that the options as suggested below. All sheet disks were resting on the bottom the the cups once the experiment began. The volume of liquid in each cup and also the temperature that the remedies were organized constant. All cup were inserted 0.5 meter from the designated irradiate source. A big beaker that water was placed between the light and the cups to act together a warmth sink to avoid a adjust in temperature. At the end of 10 minutes, the number of disks floating in each cup to be recorded.

Use your understanding of the mechanism of photosynthesis and the data presented in the graph to determine which the the statements listed below is a correct explanation for the student"s data.

A) Cup 1 had actually a low rate of photosynthesis since 0.5 grams that baking soda go not provide a sufficient amount the CO2.

B) Cup 2 had actually the highest possible rate that photosynthesis because 5 disks to be floating at the finish of 10 minutes making use of a 50 watt irradiate bulb.

C) Cup 3 had actually the same price of photosynthesis together Cup 1 due to the fact that they had actually the same ratio of disks floating come wattage that light.

D) Cup 4 had the slowest price of photosynthesis due to the fact that it had actually the least baking soda.

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D) Cup 4 had the slowest price of photosynthesis because it had the the very least baking soda.