The document discusses the light and dark reactions of photosynthesis. The light reaction occurs in the thylakoid membrane and traps light energy from the sun to produce ATP and NADPH. The dark reaction then utilizes this energy in the chloroplast stroma to produce glucose. It also notes that plants take up water and other essential minerals like nitrogen, phosphorus, and magnesium from the soil. Nitrogen is particularly important as it is used to synthesize proteins, and plants can take it up either as inorganic nitrates/nitrites or organic compounds fixed by nitrogen-fixing bacteria.

2. DEFINING PROPERTIES
NON DEFINING
PROPERTIES
 Metabolism
 Consciousness
 Growth
 Reproduction

14. CCL: Chemistry in Biology

20. Light & Dark reactions
Light reaction: Light reaction of photosynthesis takes place in
the thylakoid membrane .The light reaction is the initial stage
of photosynthesis which traps light energy to produce ATP
and NADPH.
Dark reaction : Dark reaction is the second step of
photosynthesis which utilizes the energy from ATP and
NADPH to produce glucose.
It takes place in the chloroplast stroma.

26.  Water used in photosynthesis is taken up from
soil by the roots in terrestrial plants.
 Other materials taken up from soil : Nitrogen,
Phosphorous, Iron and Magnesium
 Nitrogen
Nitrogen is an essential element used in synthesis
of proteins and other compounds.
Plants take up nitrogen in the form of inorganic
nitrates or nitrites or as organic compounds
prepared by nitrogen fixing bacteria

28.  Discuss about the sustainability of food
production and consumption in the UAE,
given its arid climate and limited natural
resources.