Photosynthesis and Plant Biology

1. Organisms, such as hawks and leopards, that obtain energy from the foods they consume are called _________________.

• heterotrophs

• autotrophs

• decomposers

• producers

4. Ingenhousz found that plants produce oxygen only in the presence of __________________.

• light

• darkness

• water

• carbon dioxide

5. Photosynthesis uses the energy of sunlight to convert water and carbon dioxide into oxygen and __________________.

• glucose

• starch

• protein

• fat

6. Photosynthesis requires light, water, carbon dioxide, and __________________.

• glucose

• oxygen

• nitrogen

• sulfur

If you separate the pigments found in a typical plant cell’s chloroplasts, you will find __________________, orange, and red pigments.

• green

• blue

• yellow

• purple

8. __________________ are photosynthetic membranes inside chloroplasts.

• thylakoids

• mitochondria

• ribosomes

• nuclei

9. Thylakoids are arranged in stacks known as __________________.

• grana

• stroma

• lamellae

• thylakoid space

10. Thylakoids are a __________________ color because they contain chlorophyll.

• green

• red

• blue

• yellow

A membrane protein called __________________ allows H+ ions to pass through the thylakoid membrane out of the thylakoids.

• membrane protein

• ATP synthase

• cytochrome b6f

• photosystem II

The electrons that chlorophyll loses to the electron transport chain are replenished by __________________ molecules.

• water

• oxygen

• carbon dioxide

• glucose