9-3 Photosynthesis and Energy Transformation Concepts

What is a predicted challenge for global food production by 2050?

• A significant decrease in human population.

• An increase in agricultural land availability.

• The plateauing of food production despite growing demand.

• A decrease in global temperatures leading to better crop yields.

Producers include all of the following EXCEPT

• Plant Kingdom

• Cyanobacteria

• Phytoplankton

• Zooplankton

What is the primary function of photosynthesis in plants?

• To release stored chemical energy for cellular activities.

• To convert light energy into chemical energy in the form of sugars.

• To absorb oxygen from the atmosphere.

• To break down complex molecules into simpler ones.

How do photosynthesis and cellular respiration relate to each other in terms of energy and molecules?

• They are identical processes that occur in different organisms.

• Photosynthesis stores energy in sugars, while cellular respiration releases energy from sugars.

• Both processes primarily produce oxygen.

• Cellular respiration creates energy, and photosynthesis consumes it.

Where do the light-dependent reactions of photosynthesis primarily occur within a plant cell?

• In the stroma of the chloroplast.

• In the cytoplasm.

• In the thylakoid membranes of the chloroplast.

• In the mitochondria.

What two energy-carrying molecules are produced during the electron transport chain in the chloroplast?

• ATP and CO2

• NADPH and O2

• ATP and NADPH

• H2O and O2

Where do the light-independent reactions (Calvin Cycle) take place within the chloroplast, and what is the primary carbon input?

• Thylakoid membrane; water

• Stroma; carbon dioxide

• Cytoplasm; glucose

• Mitochondria; oxygen

What basic sugar is synthesized by the Calvin Cycle, and what molecules provide the energy for its production?

• Glucose; ADP and NADP+

• G3P; ATP and NADPH

• Sucrose; H2O and CO2

• Starch; Rubisco and RuBP

What is carbon fixation?

• The process of plants releasing oxygen into the atmosphere.

• The conversion of light energy into chemical energy.

• Plants turning carbon dioxide from something organisms can't use into something they can use, like sugars.

• The breakdown of sugars to release energy for plant growth.