R:Dark Reaction of Photosynthesis
Quiz by DIVINA GRACIA BRILLANTES
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- Q1
1. What structure helps regulate the movement of gases into and out of the leaf?
Chlorophyll
Mesophyll
Guard cell
Stomata
10s - Q2
2. Which of the following does not affect the rate of photosynthesis?
Carbon dioxide concentration
Oxygen concentration
Temperature
Light intensity
10s - Q3
3. Among C4 plants, where does Calvin cycle takes place?
bundle sheath cells
chlorophyll cells
mesophyll cells
stroma
10s - Q4
4. How many turns of the Calvin cycle are needed to produce 1 molecule of glucose?
4
6
3
2
10s - Q5
5. The non cyclic electron flow results in the production of what compounds?
ATP and NADPH
ATP and G3P
ATP only
ATP, CO2 and NADPH
10s - Q6
6. How do CAM plants avoid photorespiration?
fixing CO2 at night then release CO2 during the day
performing Calvin cycle at night
using PEP to fix CO@ to RuBP
fixing CO2 in the mesophyll and release CO2 in the bundle sheath cells
10s - Q7
7. Photosynthesis is a redox reaction. Which molecule is reduced in the process?
CO2
water
PGA
G3P
10s - Q8
8. What purpose does it serve for the accessory pigment?
pumping H ions in the thylakoid membrane
providing electrons to the reaction center chlorophyll
absorbing photons of different wavelength and passes it on to PSII or PSI
anchoring chlorophyll a with the reaction center
10s - Q9
9. What is the stable product formed in C3 plants after carbon fixation?
RuBP
Oxaloacetate
G3P
phosphoenol pyruvate
10s - Q10
10. What is the use of NADP and ATP from the light reaction?
for converting 3-pgs to G3P
to provide energy and reducing power to Rubisco
to regenerate RuBP from 5 G3P
for combining 2 molecules of G3P
10s - Q11
11. In what direction does diffusion of H+ through the ATP synthase?
from the stroma to the thylakoid
from the matrix into the stroma
from thylakoid space to the stroma
from cytoplasm into the matrix
10s - Q12
12. Red light has more energy than yellow light.
Therefor, red light ___________.
contains more photons than yellow light
has longer wavelength than yellow light
is absorbed faster by chlorophyll a
has shorter wavelength than yellow light
10s - Q13
13. Electrons that flow through the two photosystems have their highest potential energy in ____________.
water
NADPH
photoexcited P77
P680
10s - Q14
14. What is used to regenerate RuBP?
RUBP carboxylase
G3P
2 PGA
NADPH
10s - Q15
How many NADPH are used in the dark reaction process?
12
18
16
6
10s