Biology Chloroplasts Pop Q

What is number 3?

• Thylakoid

• Strota

• Granum

• Chloroplast

Answer explanation

Granum is a STACK of thylakoids

Fun Fact: The chloroplast is similar to the mitochondria, and both contain DNA and ribosomes of their own!

What is the important atom in photosynthetic pigments?

• Na

• Cl

• Mg

• Zn

Answer explanation

Fun Fact: Mg is an extremely atom in plants, and gives plants their green colour that we see! It is essential for photosynthesis and much more.

Where is the light dependent electron transport chain located?

• Stroma

• Chloroplast Envelope

• Thylakoid Membrane

• Thylakoid Space

Answer explanation

The electron transport chain consists of membrane proteins embedded or on the thylakoid membrane!

What is the purpose of light in the light dependent stage?

• Excite electrons to release energy and donate to the electron transport chain

• Facilitate the photolysis of water

• Facilitate transport of electrons along electron transport chain

• Reduce electron carriers

Answer explanation

This process of excitation occurs in photosystems 1 and 2!

Which is the electron donor at the start of the light dependent stage?

• H2O

• ATP

• Electron Carrier

• O2

Answer explanation

The electrons in photolysis of water are used in the electron chain of the light dependent stage!

What is the pathway of electron transfer?

• Photosystem 2 -> Photosystem 1 -> Electron carrier reduction

• Photosystem 1 -> Photosystem 2 -> Electron Carrier Reduction

• Photosystem 2 -> Electron Carrier Reduction -> Photosystem 1

• Electron Carrier Reduction -> Photosystem 2 -> Photosystem 1

Where are H+ ions transported in the ATP Synthase to and by which method?

• Thylakoid Membrane to Thylakoid Space, By active transport

• Thylakoid Space to Stroma, by facilitated diffusion

• Thylakoid Membrane to Stroma, by facilitated diffusion

• Thylakoid Membrane to Stroma, by active transport

Answer explanation

1. H+ enters the thylakoid space due to the electron transport chain

2. H+ moves down the concentration gradient (high to low) through ATP synthase to form ATP

Where does the light independent cycle occur?

• Stroma

• Thylakoid Space

• Thylakoid Membrane

• Chloroplast membrane

Answer explanation

Electron carriers and ATP are used in the stroma for the calvin cycle.

What are the products of the light INDEPENDENT stage? (Calvin Cycle)

• Electron Carrier and H2O

• G3P and Carbon Dioxide

• G3P and Electron Carrier

• Electron Carrier and O2

Answer explanation

For every 3 CO2 molecules, 1 G3P molecule is generated, 6 reduced electron carriers and ATP is used in the form of energy.