11
MCQ (Single Correct Answer)
The correct sequence of flow of electrons in the light reaction is
A
PS II, plastoquinone, cytochromes, PS I, ferredoxin
B
PS I, plastoquinone, cytochromes, PS II, ferredoxin
C
PS I, ferredoxin, PS II
D
PS I, plastoquinone, cytochromes, PS II, ferredoxin
12
MCQ (Single Correct Answer)
The enzyme that is not found in a $\mathrm{C}_3$ plant is
A
RuBP carboxylase
B
PEP carboxylase
C
NADP reductase
D
ATP synthase
13
MCQ (Single Correct Answer)
The reaction that is responsible for the primary fixation of $\mathrm{CO}_2$ is catalysed by
A
RuBP carboxylase
B
PEP carboxylase
C
RuBP carboxylase and PEP carboxylase
D
PGA synthase
14
MCQ (Single Correct Answer)
When $\mathrm{CO}_2$ is added to PEP, the first stable product synthesised is
A
pyruvate
B
glyceraldehyde-3-phosphate
C
phosphoglycerate
D
oxaloacetate
15
Examine the figure
(a) Is this struture present in animal cell or plant cell?
(b) Can these be passed on to the progeny? How?
(c) Name the metabolic processes taking place in the places marked ( $A$ ) and (B).
Explanation
(a) The above figure show the chloroplast which is green in colour and performs photosynthesis in plants thus, The structure is present in plant cell.
(b) Yes, chloroplast has the power of self replication because of presence of extranuclear DNA.
(c) The metabolic that occurs in the marked places are as follows. A-It is the stroma of chloroplast where dark reaction of photosynthesis takes place.
$B$-It is the structure of extra nuclear DNA and is responsible for replication of chloroplast, when it is required in the photosynthesising cells.