Quiz on Photosynthesis and Salt Stress

What is the primary effect of increasing salt concentration on photosynthesis in algae?

• Stimulates growth

• Enhances electron flow

• Reduces photosynthesis

• Increases oxygen production

Which alga was used in the experiments to study the effects of salt on photosynthesis?

• Dunaliella

• Euglena

• Spirulina

• Chlorella vulgaris

What are the two light-dependent parts of the photosynthetic electron transport chain?

• Oxygen and hydrogen ions

• Photosystem I and II

• ATP and NADPH

• Calvin cycle and Krebs cycle

What process occurs when water splits during photosynthesis?

• Oxygen evolution

• Carbon fixation

• Electron transport

• Nutrient absorption

What is the purpose of measuring oxygen evolution in the assays?

• To analyze nutrient levels

• To measure photosystem activity

• To determine growth rate

• To assess salt concentration

How did researchers measure the impact of salt on the electron transport chain?

• By observing growth rates

• By analyzing chlorophyll content

• By measuring oxygen production and uptake

• By assessing light absorption

What is the expected impact of climate change on salinity levels?

• Decrease in salinity

• Salinity will stabilize

• Increase in salinity

• No impact on salinity

What happens to the salt balance in estuaries due to sea level rise?

• It becomes more stable

• It has no effect

• It may be upset

• It decreases significantly

What is the role of ATP and NADPH in photosynthesis?

• They are part of the ETC

• They are used in the Calvin cycle

• They enhance salt tolerance

• They are waste products

What was the duration of the incubation period for algae samples in salt solutions?

• 5 minutes

• 20 minutes

• 10 minutes

• 15 minutes