C1.3 - Photosynthesis SL + HL

What is the primary source of chemical energy for most life processes in ecosystems?

• Solar energy directly

• Chemical energy from photosynthesis

• Heat energy from respiration

• Kinetic energy from movement

In photosynthesis, where does the hydrogen used to produce glucose come from?

• Carbon dioxide

• Water

• Sunlight

• Chlorophyll

The oxygen produced during photosynthesis is a result of:

• Glucose breakdown

• Carbon dioxide splitting

• Water splitting

• Chlorophyll degradation

What does Rf value in chromatography represent?

• Rate of photosynthesis

• Ratio of pigment movement to solvent movement

• Reflection factor of light

• Relative frequency of absorption

Why do photosynthetic pigments only absorb specific wavelengths of light?

• Due to their molecular structure

• To avoid energy waste

• Because of temperature limitations

• To maximize carbon fixation

How does an action spectrum differ from an absorption spectrum?

• It shows actual photosynthetic rates

• It only measures light absorption

• It measures carbon dioxide uptake only

• It shows chlorophyll concentration

Which is NOT a limiting factor for photosynthesis?

• Temperature

• Light intensity

• Oxygen concentration

• Carbon dioxide concentration

What is the purpose of FACE experiments?

• To study plant diseases

• To predict future photosynthesis rates

• To measure oxygen production

• To analyze soil composition

Where are photosystems always located?

• In the cytoplasm

• In membranes

• In the nucleus

• In cell walls

What is the function of accessory pigments in a photosystem?

• To produce ATP

• To split water

• To expand the range of light absorption

• To fix carbon dioxide