What color(s) does chlorophyll reflect?
Blue
Red and blue
Green
Red
c. Green
Where is the electron transport chain found in plants cells?
Cytoplasm
Stroma of chloroplasts
Matrix of the mitochondria
Thylakoid membrane of the chloroplasts
d. Thylakoid membrane of the chloroplasts
How many carbon dioxide molecules must be added to RUBP to make a single molecule of glucose?
2
4
10
6
d. 6
During photosynthesis, visible light has enough energy to
Excite electrons
Split a water molecule into hydrogen and oxygen
For electrons closer to the nucleus
None of the the answers are correct
a. Excite electrons
The energy to power the Calvin cycle comes from
Oxygen
The light-independent reactions of photosynthesis
Cellular respiration
Chlorophyll
The light-dependent reactions of photosynthesis
e. The light-dependent reactions of photosynthesis
Which of the following processes is not a reaction that cells use to obtain energy from nutrients?
The krebs cycle
Glycolysis
Cellular respiration
Photosynthesis
Fermentation
d. Photosynthesis
What two products result from photosynthesis
Water and oxygen
Glucose and oxygen
Glucose and carbon dioxide
Water and carbon dioxide
b. Glucose and oxygen
What is the primary function of the light dependent reactions of photosynthesis
To produce ATP and NADPH
To use ATP to make glucose
To produce NADPH to use in respiration
To produce energy-rich glucose from carbon dioxide and water
a. To produce ATP and NADPH
Which of the following is (are) required in the Calvin cycle
All three are required (CO2, ATP, RUBP)
CO2
RUBP
ATP
internet says a. is the correct answer, quiz says itās wrong
ch of the following processes is most directly driven by light energy?
Carbon fixation in the stroma
ATP synthesis
Removal of electrons from chlorophyll molecules
Formation of RUBP
c. Removal of electrons from chlorophyll molecules
Photosynthetic pigments are embedded into the membranes of flattened sacs within chloroplasts called
Matrices
Thylakoids
Cristae
Golgi bodies
Stroma
b. Thylakoids
Carbon fixation involves the addition of carbon dioxide to
RuBisCo
RUBP
Glyceraldehyde-3 phosphate (G3P)
NADPH
b. RUBP
Molecules that absorb light energy are called
Grana
Electron transport systems
Enzymes
Pigments
Thylakoids
d. Pigments
Which of the following does NOT occur during the Calvin cycle?
Consumption of ATP
Release of oxygen
Oxidation of NADPH
Carbon fixation
b. Release of oxygen
Which of the following sequences correctly represents the flow of electrons during photosynthesis?
NADPH -> O2 -> CO2
NADPH -> chlorophyll -> Calvin cycle
NADPH -> electron transport chain -> O2
H2O -> NADPH -> Calvin cycle
d. H2O -> NADPH -> Calvin cycle
Light contains tiny packets of energy called
Rays
Light waves
Wavelengths
Sun rays
Photons
e. Photons
What does the chemiosmotic process in chloroplasts involve?
Formation of glucose, using carbon dioxide, NADPH, and ATP
Diffusion of electrons through the thylakoid membrane
Establishment of a proton gradient
Reduction of water to produce ATP
c. Establishment of a proton gradient
What is the molecule that leaves the Calvin cycle to be converted into glucose?
RUBP
G3P
ADP
3-PGA
b. G3P
In a plant cell, where are the ATP synthase complexes located?
Plasma membrane
Both thylakoid membrane and inner mitochondrial membrane
Inner mitochondrial membrane
Thylakoid membrane
d. Thylakoid membrane
Where does the Calvin Cycle take place?
Cytoplasm surrounding the chloroplast
Thylakoid membrane
Outer membrane of the chloroplast
Stroma of the chloroplast
d. Stroma of the chloroplast
Which molecule absorbs the energy of a photon in photosynthesis?
Glucose
Water
Chlorophyll
ATP
c. Chlorophyll
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.
Stoma
Cuticle
Mesophyll
Epidermis
Bundle sheath
c. Mesophyll
Which of the following statements BEST describe the relationship between photosynthesis and respiration?
Respiration is anabolic and photosynthesis is catabolic
ATP molecules are produced in photosynthesis and used up in respiration
Photosynthesis stores energy in complex organic molecules, which respiration releases it
Photosynthesis occurs only in plants and respiration occurs only in animals
c. Photosynthesis stores energy in complex organic molecules, which respiration releases it
Plants produce oxygen when they photosynthesize. Where does the oxygen come from?
Chlorophyll
Splitting of a water molecule
The electron transport chain
ATP synthesis
b. Splitting of a water molecule
What statements about thylakoids in eukaryotes is NOT correct?
The space surrounding thylakoids is the stroma
Thylakoids contain chlorophyll
Thylakoids exist as a maze of folded membranes
Thylakoids are assembled into stacks
c. Thylakoids exist as a maze of folded membranes
Which statement is false?
When chlorophyll is reduced, it gains electrons
The O2 released during photosynthesis comes from water
The light reactions for photosynthesis provide energy for the Calvin cycle
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
Plants absorb ____ and ____ wavelengths of light and reflect ____ wavelengths
Green; red; blue
Green; blue; red
White; red; green
Red; blue; green
White; green; blue
d. Red; blue; green
Which of the following statements is a CORRECT distinction between autotrophs and heterotrophs.
Only heterotrophs require oxygen
Cellular respiration is unique to heterotrophs
Autotrophs, but not heterotrophs, can nourish themselves beginning with CO2 and other nutrients that are inorganic
Only heterotrophs have mitochondria
c. Autotrophs, but not heterotrophs, can nourish themselves beginning with CO2 and other nutrients that are inorganic
Within chloroplasts, the semiliquid-like substance is called the
Stomata
Mesophyll
Stroma
Grana
Thylakoids
c. Stroma
One carbon dioxide molecule reacts in each āturnā of the Calvin cycle. How many turns of the cycle are required for the synthesis of ONE glucose molecule?
2
12
6
3
c. 6
What is the primary function of the Calvin cycle?
Use NADPH to release carbon dioxide
Split water and release oxygen
Transport RUBP out of the chloroplast
Synthesize simple sugars from carbon dioxide
d. Synthesize simple sugars from carbon dioxide
Chlorophyll is important to plants because these pigments are able to
Absorb water so that hydrolysis can be carried out in the chloroplasts
Store electrons for use during the ādarkā reaction of photosynthesis
Remove carbon dioxide from the air
Capture UV radiation that is harmful to the DNA in the nucleus of plant cells
Absorb red and blue wavelengths of light very efficiently
e. Absorb red and blue wavelengths of light very efficiently
Where does the Calvin Cycle take place?
Stroma of the chloroplast
Cytoplasm surrounding the chloroplast
Thylakoid membrane
Outer membrane of the chloroplast
a. stroma of the chloroplast
What is the energy of the first photon of light used to do in photosynthesis?
Produce ATP
Energize an electron
Synthesize glucose
Split a water molecule
b. Energize an electron
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?
5
2
1
3
6
e. 6
Three turns of the Calvin cycle produce
Glyceraldehyde3-phosphate
Glucose
Oxygen
3-phosphoglycerate
a. Glyceraldehyde3-phosphate
Most of the atmospheric oxygen occurs as a result of photosynthesis. From which of the following molecules is oxygen derived?
Water
Glucose
Carbon dioxide
Chlorophyll
NADH
a. Water
What are the substrates (normal reactants) for the enzyme RuBisCo (ribulose bisphosphate carboxylase)
ATP and NADPH
CO2 and O2
CO2 and ATP
CO2 and glucose
b. CO2 and O2
Which of the following are products of the light reactions of photosynthesis that are utilized in the Calvin Cycle?
H2O and O2
ATP and NADPH
CO2 and glucose
ADP, P, and NADP+
Electrons and H+
b. ATP and NADPH
In mitochondria, chemiosmosis translocates protons from the matrix into the intermembrane space, whereas in chloroplasts, chemiosmosis translocates protons from
The intermembrane space to the matrix
The matrix to the stroma
The stroma to the photosystem II
The stroma to the thylakoid space
d. The stroma to the thylakoid space
Organisms that can exist with light as the energy source
Heterotrophs
Decomposers
Autotrophs
Do not exist in nature
c. Autotrophs
All of the following statements are CORRECT regarding the Calvin cycle EXCEPT
The energy source utilized is the ATP and NADPH obtained through the light reactions
These reactions begin soon after sundown and end before sunrise
RuBisCo attaches carbon dioxide to ribulose bisphosphase (RUBP)
The 5 carbon sugar RUBP is constantly being regenerated
b. These reactions begin soon after sundown and end before sunrise
The overall purpose of the Calvin cycle is to
Give off oxygen for animal use
Build organic molecules
Make water
Generate NADP
Generate molecules of ATP
b. Build organic molecules
Photosynthesis pigments are embedded into the membranes of flattened sacs within chloroplasts called
Golgi bodies
Thylakoids
Stroma
Matrices
Cristae
b. Thylakoids
Which of the following processes is most directly given by light energy?
Removal of electrons from chlorophyll molecules
Carbon fixation in the stroma
Formation of RUBP
ATP synthesis
a. Removal of electrons from chlorophyll molecules
What type of organism obtains energy by metabolizing molecules produced by other organisms
Autotrophs
heterotrophs
Decomposers
Do not exist in nature
b. heterotrophs