Photosynthesis Quiz Concepts

Vocabulary flashcards covering core concepts of photosynthesis including light reactions, Calvin cycle, chloroplast anatomy, and electron transport dynamics.

Source of Electrons for Photosynthetic Electron Transport Chain

Water ($\text{H}_2\text{O}$)

Energy Source for P680 Electron Transfer

Light is required to excite and move electrons from P680 to the photosynthetic electron transport chain.

Molecular Source of Oxygen ($\text{O}_2$)

Water ($\text{H}_2\text{O}$) .

After a photon is absorbed by a chlorophyll molecule in a Light Harvesting Complex (LHC)

energy is passed from chlorophyll to chlorophyll within the light harvesting complex

Location of Light Harvesting Complexes

are located within the thylakoid membrane.

Photosynthetic Pigments

Chlorophylls and carotenoids, absorb light energy (photons).

In the Photosynthetic Electron Transport Chain:

Electrons move from water to $\text{NADP}^+$

Location of Photosynthetic Electron Transport Chain

in the thylakoid.

Chloroplast Envelope Structure

A double-membrane boundary where one of the two membranes contains porins.

Starch Location in Plant Cells

Starch is synthesized and stored in the stroma of the chloroplast.

Chemical Classification of Starch

a carbohydrate and a polysaccharide.

Water Solubility of Starch

a low-solubility polysaccharide.

Photosystem Composition

Consists of a light harvesting complex and a reaction centre complex.

While travelling the Photosynthetic Electron Transport Chain

Every electron becomes a high-energy electron twice.

Chemical Potential Energy of Carbon Dioxide ($\text{CO}_2$)

represents zero chemical potential energy.

End-Products of Photosynthesis

Starch and sucrose.

Stomates

Adjustable pores located in the epidermis of leaves

Primary Site of Photosynthesis in Leaves

in the mesophyll cells

Chlorophyll is green because

it does not absorb green light very well, reflecting it instead.

When a Carotenoid in a Light Harvesting Complex absorbs a proton

it passes the energy of that photon to a neighbouring chlorophyll.

Excited State Chlorophyll

Has one electron that has moved to a higher energy orbital

Location of photosynthetic proton concentration gradient ($\Delta[\text{H}^+]$)

Across the thylakoid membrane

Energy Source for the Proton Gradient ($\Delta[\text{H}^+]$)

Light.

Function of the Proton Gradient ($\Delta[\text{H}^+]$) in Photosynthesis

regenerating ATP.

Products of Light Reactions in Photosynthesis

ATP and NADPH.

As electrons travel from PSll to PSl in the photosynthetic electron transport chain, they lose energy

The lost energy is used to pump protons.

The $\Delta[\text{H}^+]$ gradient is produced

a combination of the water-splitting reaction and proton pumping by the photosynthetic electron transport chain.

Location of the Calvin Cycle

in the stroma of the chloroplast.

Calvin Cycle Function

generates carbohydrates from carbon dioxide ($\text{CO}_2$).

First Reaction of the Calvin Cycle

$\text{RuBP} + \text{CO}_2 \rightarrow 2\text{ (3-PGA)}$.