Photosynthesis 2025

The molecule that cells use for energy is ________.

• Oxygen

• ATP

• ADP

• Water

When the energy in an ATP molecule is used, the ATP turns into _______.

• NADP

• Carbon Dioxide

• Water

• ADP

Label the following as either products or reactants of photosynthesis

Groups:

(a) Reactants

,

(b) Products

• H2O

• CO2

• O2

• Sunlight

• C6H12O6

Why don't cells have a larger supply of ATP ready to use when needed?

• Because not every organism can photsynthesize.

• ATP can only be generated in the presence of oxygen.

• The cells don't have enough space to store it.

Place the choices into the correct categories

Groups:

(a) Heterotrophs

,

(b) Autotrophs

,

(c) Both

• Animals

• Performs Cellular Respiration

• Can Photosynthesize

• Use ATP for Energy

• Plants

The purpose of photosynthesis is for autotrophs to make _________ to use as an energy source.

• Sunlight

• Carbon Dioxide

• Water

• Glucose

After absorbing light energy, the pigment immediately transfers the energy to a(n) _____________.

• Glucose Molecule

• Electron Carrier

• ATP

• Chloroplast

The pigment chlorophyll absorbs​ (a)   light and reflects ​ (b)   light.

• Red and Blue
• Green
• All colors of

Chlorophyll and Carotene are two examples of plant _________.

• Processes

• Foods

• Pigments

• Enzymes

Why do the leaves of many plants appear red, orange, or yellow in the autumn?

• Because the chlorophyll breaks down, revealing the carotene.

• Because the plant switches from making chlorophyll to making carotene.

• Because carotenes work better in the cooler temperatures.