D. photosynthesis check your learning

•Take some time to consider the question before moving to the next slide which offers the correct answer.

•Write your answer down before you see the actual answer, this will allow you to test yourself more effectively.

CHECK YOUR LEARNING

Photosynthesis

Free to share, print, make copies and changes. Get yours at www.boundless.com

Photosynthesis

Photosynthesis is the process where:

A) autotrophs use sunlight to make organic molecules.

B) heterotrophs obtain food by eating plants.

C) heterotrophs synthesize glucose from sunlight and CO2.

D) autotrophs depend on detritivores for their food source.

Free to share, print, make copies and changes. Get yours at www.boundless.comBoundless - LO. "Boundless." CC BY-SA 3.0 http://www.boundless.com/

Photosynthesis

Photosynthesis is the process where:

A) autotrophs use sunlight to make organic molecules.

B) heterotrophs obtain food by eating plants.

C) heterotrophs synthesize glucose from sunlight and CO2.

D) autotrophs depend on detritivores for their food source.

http://www.boundless.com/

http://creativecommons.org/licenses/by-sa/3.0/


What is the difference between a photoautotroph, a chemoautotroph and a heterotroph?

All autotrophs make their own sugars (their own food). Photoautotrophs use energy from light to do this, and chemoautotrophs use energy from the oxidation of inorganic molecules/chemicals to do this. Heterotrophs do not make their own sugars (food), they obtain them from other organisms. Humans are heterotrophs. Plants and cyanobacteria are photoautotrophs (and algae). Many microbes are chemoautotrophs.

Correctly label the parts of the chloroplast indicated above at A – G.

A. B.

C.

D.

E. G

.

F.

A = inter membrane space, B = outer membrane, C = inner membrane, D = granum (a stack of thylakoids), E = thylakoid lumen (also called the thylakoid space), F = stroma (an aqueous fluid), G = thylakoid (one of the discs)

A. B.

C.

D.

E. G

.

F.

In eukaryotic photoautotrophs, photosynthesis happens in the chloroplasts. The light reactions happen at the _______________ and the Calvin cycle takes place in the _____________.

A) granum, stroma

B) Thylakoid membrane, stroma

C) Intermembrane space, thylakoid membrane

D) Thylakoid lumen, matrix

In eukaryotic photoautotrophs, photosynthesis happens in the chloroplasts. The light reactions happen at the _______________ and the Calvin cycle takes place in the _____________.

A) granum, stroma

B) Thylakoid membrane, stroma

C) Intermembrane space, thylakoid membrane

D) Thylakoid lumen, matrix


Photosynthesis

According to the chemical equation, what are the end products of photosynthesis?

A) carbon dioxide and oxygen

B) glucose and oxygen

C) oxygen and water

D) glucose and carbon dioxide


Photosynthesis

According to the chemical equation, what are the end products of photosynthesis?

A) carbon dioxide and oxygen

B) glucose and oxygen

C) oxygen and water

D) glucose and carbon dioxide





Photosynthesis

Which of the statements regarding the energy found in wavelengths is true?

A) Tight waves carry less energy than wide waves.

B) Short waves carry more energy than long waves.

C) Short and long waves carry the same amount of energy.

D) There is no way to measure the amount of energy in a wavelength.


Photosynthesis

Which of the statements regarding the energy found in wavelengths is true?

A) Tight waves carry less energy than wide waves.

B) Short waves carry more energy than long waves.

C) Short and long waves carry the same amount of energy.

D) There is no way to measure the amount of energy in a wavelength.




What wavelengths of light are useful for photosynthesis?

A) 400 – 700 um

B) 400 – 700 m

C) 400 – 700 cm

D) 400 – 700 nm

What wavelengths of light are useful for photosynthesis?

A) 400 – 700 um

B) 400 – 700 m

C) 400 – 700 cm

D) 400 – 700 nm

What are the two types of pigments that harness light energy during photosynthesis?

A) Chlorophylls and synthases

B) Carotenoids and nicotinamides

C) Chlorophylls and carotenoids

D) Chlorophyll a and b

What are the two types of pigments that harness light energy during photosynthesis?

A) Chlorophylls and synthases

B) Carotenoids and nicotinamides

C) Chlorophylls and carotenoids

D) Chlorophyll a and b

What molecule below is a chlorophyll?

What molecule below is a chlorophyll?

Note that you should be able to identify ALL of the molecules in the previous slide!

And state their biological importance!

Why do photosynthetic organisms have a variety of pigments?

A) In case one doesn’t work

B) To specifically focus the energy they need to absorb

C) So they can reflect harmful light energy

D) To broaden the wavelengths they can absorb, increasing the energy harvested.

Why do photosynthetic organisms have a variety of pigments?

A) In case one doesn’t work

B) To specifically focus the energy they need to absorb

C) So they can reflect harmful light energy

D) To broaden the wavelengths they can absorb, increasing the energy harvested.

What is the overall purpose of the light reactions?

A) To fix carbon dioxide into simple sugars.

B) To harness light energy and convert it into chemical energy in the form of ATP and NADPH.

C) To harness light energy and convert it into chemical energy in the form of glyceraldehyde-3-phosphate.

D) To lyse water.

What is the overall purpose of the light reactions?

A) To fix carbon dioxide into simple sugars.

B) To harness light energy and convert it into chemical energy in the form of ATP and NADPH.

C) To harness light energy and convert it into chemical energy in the form of glyceraldehyde-3-phosphate.

D) To lyse water.


Photosynthesis

Which part of the chloroplast holds the pigments that specifically absorb light in a plant (or algal) cell?

A) Mitochondrial membrane

B) thylakoid membrane

C) Stroma membrane

D) granum


Photosynthesis

Which part of the chloroplast holds the pigments that specifically absorb light in a plant (or algal) cell?



C) Stroma membrane

D) granum




Which of the following statements does not apply to a photosystem (either PS II or PS I)?

A) Photosystems consist of light harvesting complexes (which contain antenna proteins and pigments) and reaction centers (which contain two special chlorophyll molecules and a primary electron acceptor molecule).

B) Photosystems are embedded in the thylakoid membrane of chloroplasts.

C) Photosystem II is chemically connected to photosystem I by an electron transport chain.

D) The photosystems catalyze the formation of glyceraldehyde-3-phosphate directly.

Which of the following statements does not apply to a photosystem (either PS II or PS I)?

A) Photosystems consist of light harvesting complexes (which contain antenna proteins and pigments) and reaction centers (which contain two special chlorophyll molecules and a primary electron acceptor molecule).

B) Photosystems are embedded in the thylakoid membrane of chloroplasts.

C) There are two photosystems, and electrons flow from water, to PS II, through an electron transport chain, to PS I, to NADP+.

D) The photosystems catalyze the formation of glyceraldehyde-3-phosphate directly.

Fill in the blanks to explain how photosystems work to convert light energy to chemical energy. Use these terms:

primary electron acceptorreactioncenterchlorophyll aelectron transport chainelectrons

When light strikes the pigments in the light harvesting complex it excites an electron found within the magnesium ion of each chlorophyll (pigment). That excited electron in turn emits light, and this cascade of light is focused on the two special ___________ molecules that are found in the _________ center. Because so much light is striking those two special chlorophyll a molecules, the excitable electron found in their magnesium ion does not just change orbitals and emit light, it is actually ejected. When the chlorophyll ejects this electron it is oxidized (loss of electrons = oxidation). Those electrons are accepted by the ___________ (a molecule found in the reaction _________). It in turn transfers the electrons to an ___________________. The moment at which light energy becomes chemical energy is when ______________ are actually transferred rather than light.

Fill in the blanks to explain how photosystems work to convert light energy to chemical energy. Use these terms:

primary electron acceptorreactioncenterchlorophyll aelectron transport chainelectrons

When light strikes the pigments in the light harvesting complex it excites an electron found within the magnesium ion of each chlorophyll (pigment). That excited electron in turn emits light, and this cascade of light is focused on the two special _chlorophyll a____ molecules that are found in the _reaction________ center. Because so much light is striking those two special chlorophyll a molecules, the excitable electron found in their magnesium ion does not just change orbitals and emit light, it is actually ejected. When the chlorophyll ejects this electron it is oxidized (loss of electrons = oxidation). Those electrons are accepted by the _primary electron acceptor__ (a molecule found in the reaction _center_). It in turn transfers the electrons to an _electron transport chain__________. The moment at which light energy becomes chemical energy is when _electrons_________ are actually transferred rather than light.

Which statement below describes how electrons flow during the light reactions?

A) Oxygen PS II electron transport chain PS I NADP+

B) Water PS II electron transport chain PS I NADP+

C) Carbon dioxide PS II electron transport chain PS I NADP+

D) Water PS II electron transport chain PS I NAD+

Which statement below describes how electrons flow during the light reactions?

A) Oxygen PS II electron transport chain PS I NADP+

B) Water PS II electron transport chain PS I NADP+

C) Carbon dioxide PS II electron transport chain PS I NADP+

D) Water PS II electron transport chain PS I NAD+

As electrons flow through the electron transport chain linking PS II to PS I, what happens?

A) The electrochemical gradient is used by ATP synthase to produce ATP.

B) The energy of electron transfer is used by the electron transport chain to pump protons to the thylakoid space (lumen), creating an electrochemical gradient.

C) Electrons are continually resupplied from water lysis, as long as light energy is available.

D) All of the above.

As electrons flow through the electron transport chain linking PS II to PS I, what happens?

A) The electrochemical gradient is used by ATP synthase to produce ATP.

B) The energy of electron transfer is used by the electron transport chain to pump protons to the thylakoid space (lumen), creating an electrochemical gradient.

C) Electrons are continually resupplied from water lysis, as long as light energy is available.

D) All of the above.

Photosynthesis

During the light reactions, what membrane holds protons apart creating an electrochemical gradient that can drive ATP synthase?



C) Stroma membrane

D) granum

Photosynthesis

During the light reactions, what membrane holds protons apart creating an electrochemical gradient that can drive ATP synthase?



C) Stroma membrane

D) granum

Photosynthesis

During the light reactions, where do the protons accumulate?

A) mitochondrion

B) thylakoid lumen (space)

C) stroma

D) granum

Photosynthesis

During the light reactions, where do the protons accumulate?

A) mitochondrion

B) thylakoid lumen (space)

C) stroma

D) granum

Photosynthesis

What happens to the electrons coming out of photosystem I?

A) They are used to reduce oxygen to form water.

B) They are directly placed on carbon dioxide, making it into glyceraldehyde-3-phosphate.

C) They are used to reduce NADP+ to NADPH.

D) They are used to oxidize NADP+ to NADPH.

Photosynthesis

What happens to the electrons coming out of photosystem I?

A) They are used to reduce oxygen to form water.

B) They are directly placed on carbon dioxide, making it into glyceraldehyde-3-phosphate.

C) They are used to reduce NADP+ to NADPH.

D) They are used to oxidize NADP+ to NADPH.

Photosynthesis

What is the net input and output of the light reactions?

A) Input = water, ADP, NADP+, and light energy. Output = oxygen, ATP, NADPH

B) Input = water, ADP, NADP+, and light energy. Output = ATP, NADPH, glyceraldehyde-3-phosphate

C) Input = oxygen, ADP, NADP+, and light energy. Output = ATP, NADPH

D) Input = water, ADP, NAD+, and light energy. Output = oxygen, ATP, NADH

Photosynthesis

What is the net input and output of the light reactions?

A) Input = water, ADP, NADP+, and light energy. Output = oxygen, ATP, NADPH

B) Input = water, ADP, NADP+, and light energy. Output = ATP, NADPH, glyceraldehyde-3-phosphate

C) Input = oxygen, ADP, NADP+, and light energy. Output = ATP, NADPH

D) Input = water, ADP, NAD+, and light energy. Output = oxygen, ATP, NADH


Photosynthesis

The light-independent reactions (the Calvin cycle) use energy harvested from the light-dependent reactions to:

A) produce both NADPH and ATP.

B) drive the assembly of sugar molecules from carbon dioxide.

C) activate light reactions through enzymes.

D) convert chemical energy in one of two photosystems.


Photosynthesis

The light-independent reactions (the Calvin cycle) use energy harvested from the light-dependent reactions to:

A) produce both NADPH and ATP.

B) drive the assembly of sugar molecules from carbon dioxide.

C) activate light reactions through enzymes.

D) convert chemical energy in one of two photosystems.





Photosynthesis

Which of the following is a component of the Calvin cycle?

A) all of these answers

B) the gain of electrons in one of its stages

C) Incorporation of oxygen

D) light, which is directly required to complete the process


Photosynthesis

Which of the following is a component of the Calvin cycle?

A) all of these answers

B) the gain of electrons in one of its stages

C) Incorporation of oxygen

D) light, which is directly required to complete the process




Photosynthesis

Which of the following is not a part of the Calvin cycle?

A) Fixation of CO2 by attaching it to RuBP

B) Reduction of an intermediate molecule using electrons from NADPH

C) Regeneration of ribulose bis-phosphate so the cycle can continue

D) Conversion of glyceraldehyde-3-phosphate into RuBP

Photosynthesis

Which of the following is not a part of the Calvin cycle?

A) Fixation of CO2 by attaching it to RuBP

B) Reduction of an intermediate molecule using electrons from NADPH

C) Regeneration of ribulose bis-phosphate so the cycle can continue

D) Conversion of glyceraldehyde-3-phosphate into RuBP

Photosynthesis

Which of the following is the essential enzyme responsible for “fixing” carbon dioxide (converting it into an organic molecule?)

A) ATP synthase

B) Cytochrome C oxidase

C) RubisCO (ribulose bis-phosphate carboxylase/oxidase)

D) Ribulose bis-phosphate

Photosynthesis

Which of the following is the essential enzyme responsible for “fixing” carbon dioxide (converting it into an organic molecule?)

A) ATP synthase

B) Cytochrome C oxidase

C) RubisCO (ribulose bis-phosphate carboxylase/oxidase)

D) Ribulose bis-phosphate

Photosynthesis

What are the net inputs and outputs of the Calvin cycle?

A) In = carbon dioxide, ATP, NADPH, RuBP out = ADP, NADP+, glyceraldehyde-3-phosphate, RuBP

B) In = carbon dioxide, ATP, NADPH, out = ADP, NADP+, glyceraldehyde-3-phosphate

C) In = water, ATP, NADPH, out = ADP, NADP+, glyceraldehyde-3-phosphate, carbon dioxide

D) In = carbon dioxide, ADP, NADPH, out = ATP, NADP+, glyceraldehyde-3-phosphate

Photosynthesis

What are the net inputs and outputs of the Calvin cycle?

A) In = carbon dioxide, ATP, NADPH, RuBP out = ADP, NADP+, glyceraldehyde-3-phosphate, RuBP

B) In = carbon dioxide, ATP, NADPH, out = ADP, NADP+, glyceraldehyde-3-phosphate

C) In = water, ATP, NADPH, out = ADP, NADP+, glyceraldehyde-3-phosphate, carbon dioxide

D) In = carbon dioxide, ADP, NADPH, out = ATP, NADP+, glyceraldehyde-3-phosphate


Photosynthesis

Which of the following explains why waste does not exist in nature?

A) Every single atom of matter and energy is recycled over and over.

B) After energy is destroyed, new energy is then created.

C) all of these answers

D) Atoms disappear after a substance changes form or moves.


Photosynthesis

Which of the following explains why waste does not exist in nature?

A) Every single atom of matter and energy is recycled over and over.

B) After energy is destroyed, new energy is then created.

C) all of these answers

D) Atoms disappear after a substance changes form or moves.




Education

D. photosynthesis check your learning