Chapter 5 - Photosynthesis

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1. What color(s) does chlorophyll reflect?


1. Blue
2. Red and blue
3. Green
4. Red

c. Green

1. Where is the electron transport chain found in plants cells?


1. Cytoplasm
2. Stroma of chloroplasts
3. Matrix of the mitochondria
4. Thylakoid membrane of the chloroplasts

d. Thylakoid membrane of the chloroplasts

1. How many carbon dioxide molecules must be added to RUBP to make a single molecule of glucose?


1. 2
2. 4
3. 10
4. 6

d. 6

1. During photosynthesis, visible light has enough energy to


1. Excite electrons 
2. Split a water molecule into hydrogen and oxygen
3. For electrons closer to the nucleus
4. None of the the answers are correct

a. Excite electrons

1. The energy to power the Calvin cycle comes from


1. Oxygen
2. The light-independent reactions of photosynthesis
3. Cellular respiration
4. Chlorophyll
5. The light-dependent reactions of photosynthesis

e. The light-dependent reactions of photosynthesis

1. Which of the following processes is not a reaction that cells use to obtain energy from nutrients?


1. The krebs cycle
2. Glycolysis
3. Cellular respiration
4. Photosynthesis
5. Fermentation

d. Photosynthesis

1. What two products result from photosynthesis


1. Water and oxygen
2. Glucose and oxygen
3. Glucose and carbon dioxide
4. Water and carbon dioxide

b. Glucose and oxygen

1. What is the primary function of the light dependent reactions of photosynthesis


1. To produce ATP and NADPH
2. To use ATP to make glucose
3. To produce NADPH to use in respiration
4. To produce energy-rich glucose from carbon dioxide and water

a. To produce ATP and NADPH

1. Which of the following is (are) required in the Calvin cycle


1. All three are required (CO2, ATP, RUBP)
2. CO2
3. RUBP
4. ATP

internet says a. is the correct answer, quiz says it’s wrong

1. ch of the following processes is most directly driven by light energy?


1. Carbon fixation in the stroma
2. ATP synthesis
3. Removal of electrons from chlorophyll molecules
4. Formation of RUBP

c. Removal of electrons from chlorophyll molecules

1. Photosynthetic pigments are embedded into the membranes of flattened sacs within chloroplasts called


1. Matrices
2. Thylakoids
3. Cristae
4. Golgi bodies
5. Stroma

b. Thylakoids

1. Carbon fixation involves the addition of carbon dioxide to


1. RuBisCo
2. RUBP
3. Glyceraldehyde-3 phosphate (G3P)
4. NADPH

b. RUBP

1. Molecules that absorb light energy are called


1. Grana
2. Electron transport systems
3. Enzymes
4. Pigments
5. Thylakoids

d. Pigments

1. Which of the following does NOT occur during the Calvin cycle?


1. Consumption of ATP
2. Release of oxygen
3. Oxidation of NADPH
4. Carbon fixation

b. Release of oxygen

1. Which of the following sequences correctly represents the flow of electrons during photosynthesis?


1. NADPH -> O2 -> CO2
2. NADPH -> chlorophyll -> Calvin cycle
3. NADPH -> electron transport chain -> O2
4. H2O -> NADPH -> Calvin cycle

d. H2O -> NADPH -> Calvin cycle

1. Light contains tiny packets of energy called


1. Rays
2. Light waves
3. Wavelengths
4. Sun rays
5. Photons

e. Photons

1. What does the chemiosmotic process in chloroplasts involve?


1. Formation of glucose, using carbon dioxide, NADPH, and ATP
2. Diffusion of electrons through the thylakoid membrane
3. Establishment of a proton gradient
4. Reduction of water to produce ATP

c. Establishment of a proton gradient

1. What is the molecule that leaves the Calvin cycle to be converted into glucose?


1. RUBP
2. G3P
3. ADP
4. 3-PGA

b. G3P

1. In a plant cell, where are the ATP synthase complexes located?


1. Plasma membrane
2. Both thylakoid membrane and inner mitochondrial membrane
3. Inner mitochondrial membrane
4. Thylakoid membrane

d. Thylakoid membrane

1. Where does the Calvin Cycle take place?


1. Cytoplasm surrounding the chloroplast
2. Thylakoid membrane
3. Outer membrane of the chloroplast
4. Stroma of the chloroplast

d. Stroma of the chloroplast

1. Which molecule absorbs the energy of a photon in photosynthesis?


1. Glucose
2. Water
3. Chlorophyll
4. ATP

c. Chlorophyll

1. In biology lab, you are given a slice of leaf to examine using a microscope. You observe cells that contain chloroplasts. You observe cells that contain chloroplasts. You know you are looking at ____ cells.


1. Stoma
2. Cuticle
3. Mesophyll
4. Epidermis
5. Bundle sheath

c. Mesophyll

1. Which of the following statements BEST describe the relationship between photosynthesis and respiration?


1. Respiration is anabolic and photosynthesis is catabolic
2. ATP molecules are produced in photosynthesis and used up in respiration
3. Photosynthesis stores energy in complex organic molecules, which respiration releases it
4. Photosynthesis occurs only in plants and respiration occurs only in animals

c. Photosynthesis stores energy in complex organic molecules, which respiration releases it

1. Plants produce oxygen when they photosynthesize. Where does the oxygen come from?


1. Chlorophyll
2. Splitting of a water molecule
3. The electron transport chain
4. ATP synthesis

b. Splitting of a water molecule

1. What statements about thylakoids in eukaryotes is NOT correct?


1. The space surrounding thylakoids is the stroma
2. Thylakoids contain chlorophyll
3. Thylakoids exist as a maze of folded membranes
4. Thylakoids are assembled into stacks

c. Thylakoids exist as a maze of folded membranes

1. Which statement is false?


1. When chlorophyll is reduced, it gains electrons
2. The O2 released during photosynthesis comes from water
3. The light reactions for photosynthesis provide energy for the Calvin cycle
4. RUBP is produced during cyclic electron flow in the light reactions of photosynthesis

d. RUBP is produced during cyclic electron flow in the light reactions of photosynthesis

1. Plants absorb ____ and ____ wavelengths of light and reflect ____ wavelengths


1. Green; red; blue
2. Green; blue; red
3. White; red; green
4. Red; blue; green
5. White; green; blue

d. Red; blue; green

1. Which of the following statements is a CORRECT distinction between autotrophs and heterotrophs.


1. Only heterotrophs require oxygen
2. Cellular respiration is unique to heterotrophs
3. Autotrophs, but not heterotrophs, can nourish themselves beginning with CO2 and other nutrients that are inorganic
4. Only heterotrophs have mitochondria

c. Autotrophs, but not heterotrophs, can nourish themselves beginning with CO2 and other nutrients that are inorganic

1. Within chloroplasts, the semiliquid-like substance is called the


1. Stomata
2. Mesophyll
3. Stroma
4. Grana
5. Thylakoids

c. Stroma

1. One carbon dioxide molecule reacts in each “turn” of the Calvin cycle. How many turns of the cycle are required for the synthesis of ONE glucose molecule?


1. 2
2. 12
3. 6
4. 3

c. 6

1. What is the primary function of the Calvin cycle?


1. Use NADPH to release carbon dioxide
2. Split water and release oxygen
3. Transport RUBP out of the chloroplast
4. Synthesize simple sugars from carbon dioxide

d. Synthesize simple sugars from carbon dioxide

1. Chlorophyll is important to plants because these pigments are able to 


1. Absorb water so that hydrolysis can be carried out in the chloroplasts
2. Store electrons for use during the “dark” reaction of photosynthesis
3. Remove carbon dioxide from the air
4. Capture UV radiation that is harmful to the DNA in the nucleus of plant cells
5. Absorb red and blue wavelengths of light very efficiently

e. Absorb red and blue wavelengths of light very efficiently

1. Where does the Calvin Cycle take place?


1. Stroma of the chloroplast
2. Cytoplasm surrounding the chloroplast
3. Thylakoid membrane
4. Outer membrane of the chloroplast

a. stroma of the chloroplast

1. What is the energy of the first photon of light used to do in photosynthesis?


1. Produce ATP
2. Energize an electron
3. Synthesize glucose
4. Split a water molecule

b. Energize an electron

1. You would expect to see one glucose molecule drop out of a model of the Calvin cycle once you had seen the model turn how many times?


1. 5
2. 2
3. 1
4. 3
5. 6

e. 6

1. Three turns of the Calvin cycle produce


1. Glyceraldehyde3-phosphate
2. Glucose
3. Oxygen
4. 3-phosphoglycerate

a. Glyceraldehyde3-phosphate

1. Most of the atmospheric oxygen occurs as a result of photosynthesis. From which of the following molecules is oxygen derived?


1. Water
2. Glucose
3. Carbon dioxide
4. Chlorophyll
5. NADH

a. Water

1. What are the substrates (normal reactants) for the enzyme RuBisCo (ribulose bisphosphate carboxylase)


1. ATP and NADPH
2. CO2 and O2
3. CO2 and ATP
4. CO2 and glucose

b. CO2 and O2

1. Which of the following are products of the light reactions of photosynthesis that are utilized in the Calvin Cycle?


1. H2O and O2
2. ATP and NADPH
3. CO2 and glucose
4. ADP, P, and NADP+
5. Electrons and H+

b. ATP and NADPH

1. In mitochondria, chemiosmosis translocates protons from the matrix into the intermembrane space, whereas in chloroplasts, chemiosmosis translocates protons from


1. The intermembrane space to the matrix
2. The matrix to the stroma
3. The stroma to the photosystem II
4. The stroma to the thylakoid space

d. The stroma to the thylakoid space

1. Organisms that can exist with light as the energy source


1. Heterotrophs
2. Decomposers
3. Autotrophs
4. Do not exist in nature

c. Autotrophs

1. All of the following statements are CORRECT regarding the Calvin cycle EXCEPT


1. The energy source utilized is the ATP and NADPH obtained through the light reactions
2. These reactions begin soon after sundown and end before sunrise
3. RuBisCo attaches carbon dioxide to ribulose bisphosphase (RUBP)
4. The 5 carbon sugar RUBP is constantly being regenerated

b. These reactions begin soon after sundown and end before sunrise

1. The overall purpose of the Calvin cycle is to


1. Give off oxygen for animal use
2. **Build organic molecules**
3. Make water
4. Generate NADP
5. Generate molecules of ATP

b. Build organic molecules

1. Photosynthesis pigments are embedded into the membranes of flattened sacs within chloroplasts called


1. Golgi bodies
2. Thylakoids
3. Stroma
4. Matrices
5. Cristae

b. Thylakoids

1. Which of the following processes is most directly given by light energy?


1. Removal of electrons from chlorophyll molecules
2. Carbon fixation in the stroma
3. Formation of RUBP
4. ATP synthesis

a. Removal of electrons from chlorophyll molecules

1. What type of organism obtains energy by metabolizing molecules produced by other organisms


1. Autotrophs
2. heterotrophs
3. Decomposers
4. Do not exist in nature

b. heterotrophs