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Honors Biology – Photosynthesis Review Questions and Correct Answers
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CO2, H2O Reactants of Photosynthesis O2, C6H12O6 Products of Photosynthesis Light Reactions, Calvin Cycle 2 stages of photosynthesis Light energy bundled up as chemical energy in the form of ATP or NADPH Light Reactions Chemical energy (ATP, NADPH) + CO2 form carbohydrates and oxygen Calvin Cyc...

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  • September 11, 2024
  • 5
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

Subjects

  • honors biology photosynthesis review questions a
  • co2 h2o reactants of photosynthesis
  • o2 c6h12o6 products of photosynthesis

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  • Honors Biology

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Honors Biology – Photosynthesis
Review Questions and Correct Answers
CO2, H2O ✅Reactants of Photosynthesis

O2, C6H12O6 ✅Products of Photosynthesis

Light Reactions, Calvin Cycle ✅2 stages of photosynthesis

Light energy bundled up as chemical energy in the form of ATP or NADPH ✅Light
Reactions

Chemical energy (ATP, NADPH) + CO2 form carbohydrates and oxygen ✅Calvin
Cycle

Calvin Cycle ✅stage of photosynthesis that can occur without presence of light

Thylakoid ✅part of chloroplast Light Reactions take place in

Stroma ✅part of chloroplast Calvin Cycle takes place in

System of membranous sacs inside the inner membrane of the chloroplast ✅thylakoid

Stacks of thylakoids ✅grana

Solution surrounding the grana ✅stroma

Array of colors of sunlight ✅visible spectrum

Reflection, transmission, absorption ✅what three things can happen when white light
strikes an object?

A compound that absorbs light ✅pigment

Green pigment located in chloroplasts, giving plants their green color ✅chlorophyll

Pigment that absorbs mostly red light ✅chlorophyll a

Pigment that absorbs mostly blue light ✅chlorophyll b

Chlorophyll b, carotenoid ✅accessory pigments (2)

, Chlorophyll a ✅pigment that transfers excited electrons to the Primary electron
acceptor

Absorb light that neither chlorophyll can - greater absorption of colors from the visible
spectrum ✅purpose of carotenoids

Because chlorophyll is lost - the red and yellow colors are from carotenoids ✅in fall,
why do leaves appear red or yellow?

A cluster of proteins that contain photosynthetic pigments; embedded on the thylakoid
membrane ✅photosystem

Accessory pigments absorb light which is passed through molecules until it reaches a
specific pair of chlorophyll a molecules. ✅what is the preliminary step to
photosynthesis?

Light energy forces electrons to enter a higher energy level in 2 chlorophyll a molecules
of photosystem II. These excited electrons leave the chlorophyll a molecules. ✅what is
the first step to photosynthesis?

Excited electrons are accepted by an adjacent molecule in the thylakoid membrane
called the primary electron acceptor ✅what is the second step of photosynthesis?

The primary electron acceptor donates electrons to the first of a series of molecules
called the electron transport chain. As these electrons pass through molecules, they
lose most of their energy which is then used by the thylakoid to import H+ ions into the
cell ✅what is the third step of photosynthesis?

Light is absorbed by photosystem I and the same process occurs. The lost psi electrons
are replaced by the moving psii electrons. ✅what is the fourth step of photosynthesis?

In the stroma, electrons combine with an H+ ion and NADP+, which causes the
reduction (addition of an electron) of NADP+ to NADPH ✅what is the fifth and last step
of photosynthesis?

The splitting of water inside of the thylakoid ✅where do the replacement electrons for
photosystem II come from?

2(H2O) = 4(H+) + 4(e-) + O2 ✅what is the chemical formula for the splitting of water?

The synthesis of ATP ✅chemiosmosis

ATP synthase ✅enzyme responsible for chemiosmosis

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