Light-Dependent Reactions

Practice Problem 1:

Which statement describes thylakoids?

• Glucose is formed here.

• Water molecules are formed here.

• Only photosystem II functions here.

• Photosystems I and II function here.

Tags

NGSS.HS-LS1-5

Practice Problem 2:

Which term identifies a light-absorbing pigment?

• photosystem

• ferredoxin

• thylakoid

• chlorophyll

Practice Problem 3:

Which statement best describes the process of chemiosmosis and the direct result of its occurrence?

• Hydrogen ions flow from the thylakoid down a concentration gradient through ATP synthase channels into the stroma. ADP is converted to ATP.

• Hydrogen ions flow from the thylakoid down a concentration gradient through ATP synthase channels into the stroma. ATP is converted to ADP.

• Hydrogen ions flow from the stroma down a concentration gradient through ATP synthase channels into the thylakoid. ADP is converted to ATP.

• Hydrogen ions flow from the thylakoid against a concentration gradient through ATP synthase channels into the stroma. ADP is converted to ATP.

Practice Problem 4:

Which of the following is an inference?

• A burning candle is extinguished when it is covered with a jar.

• The candle burns longer than expected in a jar that has a plant in it.

• A plant lives longer than expected in a jar that has a burning candle.

• There is more oxygen in the jar because there is a plant in it.

Tags

NGSS.MS-LS2-3

Along with plants and algae, in which organisms can photosynthesis occur?

• some bacteria

• all fungi

• some animals

• all protists

Tags

NGSS.MS-LS1-6

During the light-dependent reaction of photosynthesis, light energy is converted into which form of energy?

• chemical

• mechanical

• thermal

• electrical

Tags

NGSS.HS-LS1-5

Which best describes how the photosystems are used in the light-dependent reactions?

• photosystem I is used first then photosystem II

• photosystem II is used first then photosystem I

• Both processes are used at the same time.

• Both processes are used during the light-independent reactions.

Tags

NGSS.HS-LS1-5

Which is the site of the light-dependent reactions of photosynthesis?

• mitochondria

• stomata

• stroma

• thylakoids

How is ADP converted to ATP?

• by the addition of one adenosine molecule

• by the addition of one phosphate group

• by the removal of one adenosine molecule

• by the removal of one phosphate group

Tags

NGSS.HS-LS1-7

Which event occurs in photosystem I?

• Water molecules are broken apart.

• Light energy excites electrons.

• Oxygen is released as waste.

• Electrons are transferred to ferredoxin.