Biology, Light Independent Reactions in Photosynthesis

Which process occurs during the light-dependent reactions in photosynthesis? A) Water molecules are split. B) Carbon fixation occurs. C) 3-PGA is reduced. D) RuBP is regenerated.

A) Water molecules are split.

What is required for both the light-dependent and light-independent reactions to proceed? A) energy B) CO2 C) water D) ATP and NADPH

A) energy

Which is an important difference between light-dependent (L-D) and light-independent (L-IND) reactions in photosynthesis? A) The L-D reactions need CO2 and light energy, and the L-IND reactions needs water and O2. B) The L-D reactions require light energy and water, and the L-IND reactions require ATP, NADPH and CO2. C) The L-D reactions can only occur during daylight, and the L-IND reactions can only occur during the night. D) The L-D reactions need water and CO2, and the L-IND reactions need CO2 and light.

B) The L-D reactions require light energy and water, and the L-IND reactions require ATP, NADPH and CO2.

How do ATP and NADPH connect light-dependent and light-independent reactions in photosynthesis? A) ATP and NADPH are produced in both reactions. B) ATP and NADPH are used in both reactions. C) ATP and NADPH are produced in the light-dependent reactions and used in the light-independent reactions. D) ATP and NADPH are produced in the light-independent reactions and used in the light-dependent reactions.

C) ATP and NADPH are produced in the light-dependent reactions and used in the light-independent reactions.

Which is the first step in the scientific method? A) ask a question B) conduct background research C) construct a hypothesis D) perform an experiment

C) construct a hypothesis

What is the source of the carbon dioxide that is used in photosynthesis? A) sunlight B) the soil C) the atmosphere D) the plant

C) the atmosphere

What is one role of ATP in the light-independent reaction of photosynthesis? A) ATP supplies the energy to produce glucose and other carbohydrates. B) ATP is produced when water molecules are split and chlorophyll electrons are excited. C) ATP supplies the energy to split water molecules. D) ATP produces CO2 and O2 molecules.

D) ATP produces CO2 and O2 molecules.

Which is the best hypothesis for the scientific question "How does light intensity affect the rate of photosynthesis?" A) Light intensity, CO2 concentration, and temperature are factors that determine the rate of photosynthesis. B) Light intensity has no effect on the rate of photosynthesis. C) If the distance between the source of light and the plant is increased, the rate of photosynthesis will decrease. D) Light intensity has an impact on the rate of photosynthesis.

D) Light intensity has an impact on the rate of photosynthesis.

Which statement about the light-independent reactions in photosynthesis is true? A) They occur in the thylakoids. B) They produce ATP and NADPH. C) They release oxygen as waste. D) They comprise the Calvin cycle.

D) They comprise the Calvin cycle.

In which type of environment are plants most likely to use a C4 pathway of carbon fixation? A) cold and wet B) cold and dry C) hot and wet D) hot and dry

D) hot and dry