4.2 and 4.3 Quiz - Photosynthesis: Overview and Detail

Which of the following statements best describes the process of photosynthesis?

• Plants use oxygen to make simple sugars
• Chlorophyll builds sugars in the thylakoid membrane
• Light breaks down water molecules and releases carbon dioxide
• Chloroplasts absorb sunlight and store chemical energy

An organism makes its own energy from either sunlight or breaking down chemical compounds. What is the term for an organism that is able to do this?

(a)  

What is the term for the green pigment found in the membranes of chloroplasts that absorb mostly blue and red light?

(a)  

The function of the light-dependent reactions is to

• build sugars
• capture and transfer energy
• release carbon dioxide
• form water molecules

The light-dependent reactions of photosynthesis need the electrons and ions of a (a)   molecule in order to transfer energy from sunlight to ATP.

Which of the following takes place in the light-dependent reactions of photosynthesis?

• Sugars are made
• Water molecules are split
• Chlorophyll is pumped
• CO2 is formed

Where do the hydrogen ions and electrons for Photosystems I and II come from?

• sugars
• sunlight
• acids
• water

Which phrase best describes the electron transport chain in Photosystems I and II?

• a chain of photosynthetic proteins located in the stroma
• a collection of enzymes used to make ADP
• a series of proteins located in the thylakoid membrane
• a group of independent enzymes that carries energy to the Calvin cycle

Scientists supply plants with water molecules containing a heaver-than-usual oxygen isotope, oxygen-18. Which of the products of photosynthesis will contain this isotope? Explain.

Which of the following occur in the light-independent reactions of photosynthesis?

• CO2 enters the Calvin cycle and sugars are made
• H2O is broken down and oxygen is released
• NADPH is produced and transferred to photosystem I
• electrons are energized and used to pump H+ ions