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MYP Biology Unit 3
Name: ___________________________ Block: ____ Assignment #:_______
Photosynthesis
1.
(a)
State the location in the chloroplast of the following reactions of photosynthesis.
Light-independent reactions: .......................................................................................
Light-dependent reactions: ..........................................................................................
(2)
(b)
Explain what happens in the light-dependent and light-independent reactions of photosynthesis.
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(3)
2.
(a)
Explain why carbon dioxide concentration is a limiting factor of photosynthesis.
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(2)
(b)
Explain the relationship between the structure of the chloroplast and its function.
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(3)
(c)
State chemical equation of photosynthesis.
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(1)
3.
Draw a labelled diagram of a chloroplast and include any process which occur inside the chloroplast.
(4)
IB Questionbank Biology
1
4.
(a)
State the main photosynthetic pigment in plants.
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(1)
(b)
Define photosynthesis.
.....................................................................................................................................
(1)
(c)
State two factors which effect photosynthesis.
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(2)
_____5. Where are the light-dependent and light-independent reactions taking place in the diagram below?
Light-dependent
Light-independent
A.
I
IV
B.
II
III
C.
III
II
D.
IV
I
_____6. Which type of light is least useful for photosynthesis in terrestrial plants?
A.
Blue
B.
Green
C.
White
D.
Red
_____7. Where is chlorophyll found in a plant cell?
A.
Thylakoid membranes
B.
Stroma
C.
Matrix
D.
Cristae
IB Questionbank Biology
2
Biology 9: Unit 3 Practice #1
1.
(a)
(b)
light-independent reactions: stroma;
light-dependent reactions: thylakoid / grana;
absorb photons of light / photoactivation;
raised to a higher energetic level;
pass from molecule to molecule;
drop back to own level emitting energy;
2
3 max
[5]
2.
(a)
photosynthetic rate rises as CO2 concentration rises;
up to a maximum when rate levels off / labelled graph showing outline
of relationship;
at high levels of CO2 other factors become limiting;
CO2 levels most important determinant of photosynthetic rate / rate limiting
factor;
stomata need to close to prevent water loss, which prevents CO2 uptake;
3 max
(b)
large surface area for light absorption;
small space inside thylakoids for accumulation of protons;
fluid stroma for the enzymes of the Calvin cycle;
3
ATP and NADPH + H+ / NADPH2
2
(c)
[8]
IB Questionbank Biology
3
MYP Biology Unit 3
Name: ___________________________ Block: ____ Assignment #:_______
Cell Respiration
1.
(a)
Draw a labelled diagram of a mitochondrion.
(3)
(b)
Explain how the structure of a mitochondrion is adapted for its function.
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(3)
2.
(a)
State the chemical reaction of cellular respiration.
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(1)
(b)
Outline the role of oxygen in cellular respiration.
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(2)
IB Questionbank Biology
4
3.
Compare mitochondria and chloroplast in regards to three different features. (3 points)
Mitochondria
1.
Chloroplast
........................................................... ...........................................................
........................................................... ...........................................................
2.
........................................................... ...........................................................
........................................................... ...........................................................
.
3.
........................................................... ..........................................................
........................................................... ...........................................................
4.
Compare photosynthesis and cellular respiration in regards to three different features. (3 points)
Photosynthesis
1.
Cellular Respiration
........................................................... ...........................................................
........................................................... ...........................................................
2.
........................................................... ...........................................................
........................................................... ...........................................................
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3.
........................................................... ..........................................................
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5.
The diagram below shows possible pathways for the breakdown of glucose in various cells.
Glucose
A
Process Q
(no oxygen present)
B
(a)
(b)
C+D
Process R
(oxygen present)
D+E
State the names of processes.
R:
...........................................................................................................................
Q:
...........................................................................................................................
State the location in which process R takes place.........................................................................
State the location in which process A takes place.........................................................................
IB Questionbank Biology
5
Biology 9: Unit 3 Practice #2
1.
(a)
(b)
2.
Award [1] for each structure clearly drawn and clearly labelled.
overall circular or cylindrical shape;
smooth outer membrane and inner folded membrane shown close
together;
cristae, shown as thin folds of the inner membrane orientated
towards the inside of the mitochondrion;
matrix;
ribosomes/circular DNA;
intermembrane space;
large inner surface area of cristae for respiratory complexes/
electron transport chains;
matrix contains/encloses DNA and ribosomes for protein
(enzyme) synthesis / Krebs cycle enzymes;
(double) membrane(s) isolates metabolic processes from
the rest of the cytoplasm;
small IM space between inner and outer membranes for
accumulation of protons;
Answers must clearly link a structure to a function for a mark.
3 max
2 max
(a)
inter-membrane space / outside inner membrane / between
outer and inner membrane
(b)
in the electron transport chain;
final electron/hydrogen acceptor;
combines with H+ (and electrons) to produce water;
2 max
cristae for increasing surface area;
small inter-membrane space for rapid build-up of concentration gradient;
matrix with chemical concentration to support unique chemical reactions;
2 max
(c)
5.
Mitochondria
1.
Chloroplast
........................................................... ...........................................................
........................................................... ...........................................................
2.
........................................................... ...........................................................
........................................................... ...........................................................
.
3.
........................................................... ..........................................................
........................................................... ...........................................................
IB Questionbank Biology
6
6.
Photosynthesis
1.
Cellular Respiration
........................................................... ...........................................................
........................................................... ...........................................................
2.
........................................................... ...........................................................
........................................................... ...........................................................
.
3.
........................................................... ..........................................................
........................................................... ...........................................................
5.
(a)
State the names of processes.
R:
aerobic
Q:
anaerobic
(b) R = inside mitochondria (matrix)
IB Questionbank Biology
A= Cytoplasm
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