Photosynthesis Mechanisms and Processes

Photosynthesis Mechanisms and Processes

Assessment

Interactive Video

Created by

Liam Anderson

Biology, Science

9th - 12th Grade

Hard

The video explains the light-dependent reactions of photosynthesis, focusing on the thylakoid membrane's role in electron excitation and energy transfer. It details how light energy excites electrons, creating a hydrogen ion gradient that fuels ATP production. The video also covers the roles of photosystems, P680, and P700 in electron transfer and NADPH formation, highlighting the production of oxygen as a byproduct.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the two main stages of photosynthesis?

Oxidative phosphorylation and photolysis

Electron transport chain and fermentation

Glycolysis and Krebs cycle

Light-dependent reactions and Calvin cycle

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary role of the thylakoid membrane in photosynthesis?

To absorb carbon dioxide

To produce chlorophyll

To facilitate electron transfer and create a hydrogen ion gradient

To store glucose

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How is the energy from excited electrons used in the thylakoid membrane?

To produce oxygen directly

To absorb more light

To pump hydrogen ions and create a gradient

To synthesize glucose

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the significance of the hydrogen ion concentration gradient in the thylakoid lumen?

It helps in the synthesis of glucose

It drives the production of ATP

It absorbs more light

It releases oxygen

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which pigment is responsible for donating electrons in the light-dependent reactions?

Carotenoids

P680 chlorophyll

P700 chlorophyll

Xanthophylls

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the byproduct of water oxidation in the light-dependent reactions?

NADPH

Oxygen

Glucose

Carbon dioxide

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is Photosystem II named as such despite being the starting point of the light-dependent reactions?

It was discovered after Photosystem I

It absorbs light at a higher wavelength

It is located in a different part of the chloroplast

It produces more ATP

8.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main function of Photosystem I in the light-dependent reactions?

To split water molecules

To reduce NADP+ to NADPH

To absorb carbon dioxide

To produce ATP

9.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the role of ATP synthase in the light-dependent reactions?

To reduce NADP+ to NADPH

To convert ADP to ATP using the hydrogen ion gradient

To absorb light energy

To split water molecules

10.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which molecule is reduced to form NADPH in the light-dependent reactions?

NADP+

FAD

NADH

ATP

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