Unit 3 Quiz #2 Photosynthesis Review

The function of light in photosynthesis is to excite electrons in chlorophyll.

Answer explanation

T

Tags

NGSS.HS-LS1-5

Oxygen plays a vital role in the process of photosynthesis.

Answer explanation

False; oxygen is a byproduct

Tags

NGSS.HS-LS1-5

NGSS.HS-LS1-6

NGSS.HS-LS2-5

During the light dependent reactions, protons (H+) accumulate in the stroma creating a concentration gradient.

Answer explanation

False; not in the stroma, in the thylakoid lumen

In order for an organism to be classified as a photoautotroph it must have chloroplasts.

Answer explanation

True

Tags

NGSS.HS-LS1-5

Photosynthesis captures energy from the sun and produces a carbohydrate

Answer explanation

True

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

Read the statements below regarding photosystems. Which statement does not accurately describe their functions?

• Both photosystem I and photosystem II contain pigment molecules that capture light
• Inside of the reaction center there are electrons. These electrons are excited by solar energy and then pass to electron acceptor molecules
• Photosystem I is closely associated with molecules that aid in the splitting of water.
• The flow of electrons goes from photosystem II to photosystem I

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

Which of the following represents both a product of the light reactions and a reactant in the Calvin cycle?

• Both ATP and NADPH
• ATP
• ADP + Pi
• NADPH
• NADP+

Which of these does NOT represent a process that occurs in the thylakoids?

• Light absorption by chlorophylls and carotenoids
• Carbon dioxide fixation
• Electron transfer
• ATP synthesis

Tags

NGSS.HS-LS1-5

Photoprotection is a process that helps organisms to mitigate (lessen) the damaging effects of the sun. In plants, which pigment plays a central role in this process of photoprotection?

• Chlorophyll a
• Chlorophyll b
• Carotenoids
• Flavonoids

Both photosynthesis and cellular respiration have a series of reactions in which electrons are passed from one molecule to another. These are known as redox reactions. What does reduction and oxidation specifically refer to in these redox reactions?

• Reduction refers to a gain of electrons, while oxidation refers to a loss of electrons.
• Reduction refers to the loss of electrons on carbon dioxide, while oxidation refers to the gain of electrons by oxygen.
• Reduction refers to a loss of electrons, while oxidation refers to a gain of electrons.
• Reduction refers to the cyclic transfer of electrons and oxidation refers to the linear transfer of electrons.

Tags

NGSS.HS-LS1-7