Download Photosynthesis has 3 stages

Section 2 chapter 5
Page 97
Photosynthesis has 3 stages:
1. Energy is captured from (a)_________________.
2. Light energy is converted to (b)______________ energy that
is then (c)____________ in ATP and (d)___________.
3. The chemical (e)_____________ that is stored in (f)_______
and (g)______, powers formation of
(h)__________________ compounds, using (i)________
________, also called CO2.
The chemical equation for photosynthesis is:
(pay attention to the equation)
light
(j,k,l) 6CO2 +6H2O------ C_H_O_ + 6O2
Page 98 STAGE ONE
Chlorophyll is the primary (m)_____________ involved in
photosynthesis. It absorbs mostly (n)____________ and
(o)_______________ light and (p)______________ green and
(q)__________ light. This reflection is what causes leaves to
appear (r)_________________.
In the fall the leaves turn many different colors. This is because
there is another pigment found in them. This pigment is called
(s)________________. Having both kinds of pigments allows
plants to (t) ________________ more light energy.
Production of oxygen:
Disk shaped structures that are embedded with pigments are called
(u)_______________. When light strikes these disk shaped
structures, (v)______________ is transferred to electrons in the
(w)_____________. These electrons are said to be
(x)‘_______________’. During this process, (y)______________
(H20) molecules are split by an enzyme in the thylakoid. Oxygen
atoms from the dissembled water molecules combine forming
(z)_________ ____, O2
Section 2 chapter 5
Page 100 STAGE TWO
The light –dependent reactions of photosynthesis can be
summarized as follows: Pigment molecules in the
(1)______________ of chloroplasts absorb(2) ______________
_____________.
(3)________________ in the pigments are excited by
(4)___________ and move through (5)__________________
______________ ____________.
Oxygen atoms from (6)______________ _____________combine
to form oxygen gas.
Hydrogen ions accumulate inside thylakoids, setting up a
(7)________________
_____________ that provides energy to
make (8)________.
Page 102 STAGE THREE
We will cover stage three when we compare the Calvin Cycle to
the Kreb’s cycle. But here are a couple of questions for you.
The reactions that ‘fix’ carbon dioxide are sometimes called
(9) ______________ ________________, or
light (10) ____________ reactions.
Factors that affect Photosynthesis
Photosynthesis is affected by several environmental factors. The
most obvious is (11)______________. The rate of photosynthesis
increases as light (12)_________________ increases until all of
the (13)_______________ are being used.
(14)________________ ________________ concentration also
affects the rate of photosynthesis.
(15)_____________________ is also most efficient within a
certain range of (16)_____________________.