Photosynthesis Lab Quiz

When something appears blue, it is absorbing all colors except A. Blue. B. Yellow. C. Orange. D. Green. E. Red.

A. Blue.

Paper chromatography was used to produce the result seen below. Which of the bands would be the least likely to absorb yellow wavelengths of light during photosynthesis? A. Band marked B B. Band marked A C. Band marked C D. Band marked D

A. Band marked B

Four test tubes containing Elodea plants, sodium bicarbonate, and topped with a volumeter were exposed to different colors of light. Which of the lines on the graph probably shows the data from a tube of Elodea exposed to green light? A. Line C B. Line D C. Line A D. Line B

A. Line C

Of the visible light spectrum, the rate of photosynthesis is greatest under A. Yellow light. B. Orange light. C. Red light. D. Blue light. E. Green light.

D. Blue light.

The specialized organelles that carry out photosynthesis are called A. Mitochondria. B. Ribosomes C. Vesicles D. Chloroplasts. E. Contractile vacuoles

D. Chloroplasts.

Match each pigment with its color. 1. Xanthophyll, 2. Chlorophyll a, 3. Chlorophyll b, 4. Carotene -Yellow-orange -Yellow -Blue-green -Yellow-green

1. Yellow 2. Blue-green 3. Yellow-green 4. Yellow-orange

The primary photosynthetic pigment is A. Phaeophytin B. Chlorophyll C. Xanthophyll D. Phycobilin E. Carotene

B. Chlorophyll

The rate of photosynthesis is much greater in the green than red light spectrum. A. True B. False

B. False

The reactants of photosynthesis are A. Glucose and carbon dioxide. B. Water and carbon dioxide. C. Glucose and water. D. Water and oxygen. E. Glucose and oxygen.

B. Water and carbon dioxide.

In paper chromatography, photosynthetic pigments from a plant pigment extract will separate due to their (Check all that apply) -Differences in molecular weight. -Differences in solubility in a chromatography transport solution (mobile phase). -Differences in affinity for the chromatography paper (stationary phase). -Differences in boiling point. -Differences in pH.

-Differences in solubility in a chromatography transport solution (mobile phase). -Differences in affinity for the chromatography paper (stationary phase).

In the white light experiment, in which elodea leaves and sodium bicarbonate were added to tubes, the net rate of photosynthesis was determined by volume changes in volumeters due to (Check all that apply) -The volume of oxygen produced during photosynthesis. -The volume of oxygen consumed during respiration. -The volume of CO2 consumed during photosynthesis. -The volume of CO2 produced during respiration. -The amount of sodium bicarbonate used.

-The volume of oxygen produced during photosynthesis. -The volume of oxygen consumed during respiration.

Most biologists agree that the most important metabolic pathway of living organisms is photosynthesis because its products directly or indirectly affect most living organisms. A. True B. False

A. True

In the presence of acid, phenol red turns yellow. As the pH rises (becomes alkaline), the solution returns to red. Based on this explanation, the uptake of CO2 by a plant in distilled water containing CO2 and a drop of phenol red would cause the water solution to A. Turn opaque. B. Turn yellow. C. Turn pink. D. Turn red. E. Turn clear.

C. Turn pink.

Photosynthesis takes place in the plant's A. Woody growth. B. Flowers. C. Stems. D. Roots. E. Leaves and green stems.

E. Leaves and green stems.

What is photosynthesis? (Check all that apply). -Fermentation -The conversion of sunlight energy into chemical energy -The process by which plants, some bacteria, and some protist use the energy from sunlight to produce sugar -The process by which cellular respiration converts glucose into ATP, the "fuel" used by all living things -Respiration -Phosphorylation

-The conversion of sunlight energy into chemical energy -The process by which plants, some bacteria, and some protist use the energy from sunlight to produce sugar

What is the main role of the pigment molecules? A. Absorb photons and transfer light energy to the reaction center chlorophyll. B. Increase H+ concentration in the stroma. C. Synthesize NADPH. D. Pass electrons to the electron transport chain and then to NADPH. E. Oxidize water and release oxygen to the reaction center chlorophyll.

A. Absorb photons and transfer light energy to the reaction center chlorophyll.

A student set up an experiment to show the effect of light color on photosynthesis in Elodea plants. She filled three test tubes with distilled water and placed a piece of Elodea in each of the tubes. She added a drop of phenol red, which turns red in a basic solution and yellow in an acidic solution. She blew in each tube to add carbon dioxide, which caused the distilled water to become more acidic so the phenol red turned yellow. She exposed Tube A to white light, Tube B to green light, and Tube C was wrapped in aluminum foil. Which of the tubes should she expect to turn red the fastest? A. Tube A B. Tube C C. Tubes A and B will turn red at the same rate. D. Tube B E. All three tubes will turn red at the same rate.

A. Tube A

Which of the following statements about chlorophyll is correct? A. All of the choices are correct. B. It reflects light in the green light spectrum. C. It reflects all colors in the light spectrum except green. D. It reflects high-energy electrons. E. It appears green because it absorbs light in the green light spectrum.

B. It reflects light in the green light spectrum.

Which best explains the role of plant pigments in photosynthesis? A. Provide electrons B. Produce photon energy C. Absorbs light energy D. Reduce NADP E. Convert heat to electricity

C. Absorbs light energy

The color of a photopigment is due to A. The color of light. B. The season of the year. C. The color of light that it reflects. D. The color of light that it absorbs. E. The color of the leaf.

C. The color of light that it reflects.

A student set up a test tube containing sodium bicarbonate and topped it with a volumeter, but forgot to add the Elodea plant! Which of the statements below gives the result that the student would be likely to observe? A. The level of liquid in the volumeter would rise due to diffusion. B. The level of liquid in the volumeter would remain constant since gas is being produced and used at the same rate. C. The level of the liquid in the volumeter would remain constant since gas is neither being produced nor being used. D. The level of liquid in the volumeter would fall since there is less mass in the test tube. E. The level of liquid in the volumeter would fall since atmospheric pressure is greater than the pressure within the test tube.

C. The level of the liquid in the volumeter would remain constant since gas is neither being produced nor being used.

The products of photosynthesis are A. Water and oxygen. B. Glucose only. C. Glucose and carbon dioxide. D. Glucose and oxygen. E. Water and carbon dioxide.

D. Glucose and oxygen.

What would you expect to happen if you compare the rate of photosynthesis in bright white light and in darkness? A. The rate of photosynthesis will not be affected by bright white light or darkness. B. The rate of photosynthesis will start slowly under bright white light, and then increase in darkness. C. The rate of photosynthesis will remain constant in bright white light and darkness. D. The rate of photosynthesis will be greater in bright white light than in darkness. E. The rate of photosynthesis will be less under bright white light than in darkness.

D. The rate of photosynthesis will be greater in bright white light than in darkness.

Based on a variety of experiments, it is known that the rate of photosynthesis is highest when wavelengths of light between 400 and 500 nm are used, and when wavelengths around 700 nm are used. What does this indicate about the relative importance of chlorophyll a and b in photosynthesis? A. Reflection of light by chlorophyll a and b is essential for the process of photosynthesis. B. The combined reflection of light by chlorophyll a and absorption of light by chlorophyll b are essential for the process of photosynthesis. C. Transmission of light by chlorophyll a and b is essential for the process of photosynthesis. D. Chlorophyll a and b are much less important than other pigments in the reflection, absorption and transmission of light relevant to photosynthesis. E. Absorption of light by chlorophyll a and b is essential for the process of photosynthesis.

E. Absorption of light by chlorophyll a and b is essential for the process of photosynthesis.

How does a phenol red-containing solution look if CO2 level is low? A. Green B. Yellow C. Colorless D. Pink E. Red

E. Red

A student set up an experiment where pieces of Elodea plant were placed in different test tubes and sodium bicarbonate solution was added. One of the tubes was wrapped in aluminum foil before both tubes were placed in front of a bright white light. Volumeters were placed on top and the volume was read every 10 minutes for 30 minutes. The results can be seen in the table below. Which of the tubes was exposed to light and how can you tell? A. Volumeter B was in the light. The level of liquid in the volumeter went up because the plant was producing carbon dioxide during photosynthesis. B. Volumeter B was in the light. The level of liquid in the volumeter went down because the plant was producing gas during photosynthesis. C. Volumeter A was in the light. The level of liquid in the volumeter went down because the plant was using up the available carbon dioxide in the water. D. Volumeter A was in the light. The level of liquid went down because the plant was using up the available oxygen in the water. E. Volumeter B was in the light. The level of liquid in the volumeter went up because the plant was producing oxygen during photosynthesis.

E. Volumeter B was in the light. The level of liquid in the volumeter went up because the plant was producing oxygen during photosynthesis.