141 Set 5 Photosynthesis

141 Set 5 Photosynthesis - Bio141 F 2010 Spell Problem Set...

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Unformatted text preview: Bio141 F 2010 Spell Problem Set V 
 Note: Supplemental Instruction Problem Sets provide you a means to test your ability to apply your knowledge to biological questions. It is highly suggested that you work on these on your own, but they do not have to be handed in and will not be graded. Your TAs will hold Supplemental Instruction sessions every week for discussion of the topics in these sets, but neither they nor your professor will provide you with the answer Instructions: 1). Fill in the following concept map of photosynthesis.
 
 
 
 
 
 Bio141 F 2010 Spell Problem Set V 
 2.)
Answer
true
or
false
 
 
 ___
Cellular
respiration
can
occur
in
plants.
 
 ___
Dark
(Calvin)
cycles
still
occur
in
plants
that
have
spent
their
entire
lives
in
the
 dark.
 
 ___
Photosynthesis
is
an
endergonic
reaction.
 
 
 ___
Rubisco
would
work
best,
in
terms
of
the
survival
of
the
plant,
in
oxygen‐filled
 chamber.
 
 
 3.)
Rubisco
is
thought
to
be
one
of
the
most
abundant
proteins
on
Earth.
It
plays
an
 extremely
important
role
in
photosynthesis,
despite
its
relatively
slow
functioning
 in
comparison
to
other
enzymes.
Most
life
forms
could
not
exist
on
Earth
without
 the
proper
functioning
of
rubisco.
 Describe
why
rubisco
is
so
important
to
energy
storage
during
photosynthesis.
Why
 would
carbon‐containing
compounds,
i.e.
CO2,
be
unusable
by
both
plants
and
 animals
if
rubisco
did
not
exist?
 
 
 
 
 
 
 
 
 The
active
sites
of
rubisco
all
contain
metallic‐centered
rings
(with
magnesium).
 What
type
of
biomolecule
have
we
studied
that
is
composed
of
a
similar
structure?
 How
are
their
functionalities
related?

 
 
 
 
 
 
 
 
 
 
 
 
 
 Bio141 F 2010 Spell Problem Set V 
 Because
of
its
structure,
oxygen
is
also
able
to
bind
to
rubisco
binding
sites.
When
 this
happens,
a
process
called
photorespiration
occurs,
which
results
in
an
unusable
 carbon
compound,
which
requires
additional
energy
to
break
it
down.
What
do
you
 think
is
the
initial
relation
between
increased
carbon
dioxide
concentration
in
the
 atmosphere
and
the
effectiveness
of
rubisco
in
photosynthesis?
In
what
type
of
 environments
might
photorespiration
occur
(hint:
think
about
the
stomata)?
 
 
 
 
 
 
 
 Global
warming
has
become
a
topic
of
increased
concern
for
environmentalists
and
 ecologist.
Due
to
industrialization,
atmospheric
carbon
dioxide
levels
have
increased
 dramatically
and
are
40%
higher
than
they
were
20
million
years
ago.
While
this
 may
initially
seem
like
an
advantage
for
an
enzyme,
which
fixes
carbon,
such
as
 rubisco,
there
are
many
factors
to
take
into
consideration.
For
instance,
rubisco
 activase
is
a
protein
that
regulates
rubisco’s
activity
and
is
needed
for
it
to
work
 properly.
One
must
also
consider
the
temperature
increase
associated
with
 increases
in
carbon
dioxide
levels.
With
this
knowledge,
explain
how
rubisco
activity
 may
be
impacted
by
global
warming?
Why?

 
 
 
 
 
 
 
 
 Researchers
at
the
Max
Plank
institute
has
been
monitoring
atmospheric
carbon
 dioxide
levels,
and
have
started
work
on
a
molecularly
modified
form
of
rubisco,
 which
fixes
carbon
dioxide
more
efficiently,
even
in
the
presence
of
CO2.

What
 impact
could
this
modified
protein
have
on
the
environment
if
it
were
infused
into
 plant
cells?

(C.
Liu,
A.
L.
Young,
A.
Starling‐Windhof,
A.
Bracher,
S.
Saschenbrecker,
B.
Vasudeva
Rao,
K.
Vasudeva
Rao,
O.
 Berninghausen,
T.
Mielke,
F.
U.
Hartl,
R.
Beckmann
and
M.
Hayer‐Hartl.
Coupled
chaperone
action
in
folding
 and
assembly
of
hexadecameric
Rubisco.
Nature,
January
14,
2010).

 
 
 
 
 
 
 
 
 
 Bio141 F 2010 Spell Problem Set V 
 5.)
From
the
Bioflix
animations
of
photosynthesis
on
Blackboard:
 
 
 
 At
the
beginning
of
the
light
reaction
of
photosynthesis,
what
happens
to
the
energy
 level
of
the
electrons
due
to
the
effects
of
sunlight?
 
 
 
 
 
 As
the
electrons
move
through
this
stage
of
the
reaction,
what
happens
to
their
 energy
level?
 
 
 
 
 What
are
the
initial
reactants
of
this
stage
of
photosynthesis?
What
are
the
 products?
 
 
 
 
 
 What
is
the
product
that
is
indicated
by
the
circle
and
what
is
it
carrying?
How
many
 is
it
carrying?
 
 
 
 
 Bio141 F 2010 Spell Problem Set V 
 6.)
 
 
 What
are
the
structures
on
the
surface
of
this
leaf
that
are
displayed
in
this
picture?
 
 
 
 
 
 
 
 
 
 What
is
entering
and
what
is
leaving
through
this
opening?
 
 
 
 
 
 
 
 
 How
might
these
openings
behave
in
a
very
hot
environment?
Why?
How
does
this
 effect
photosynthesis?
 
 
 ...
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This note was uploaded on 10/17/2011 for the course BIO 141 taught by Professor Dr.cafferty during the Fall '11 term at Emory.

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