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WorksheetsPhotosynthesis
Total questions: 22
Worksheet time: 58mins
Name
Class
Date
1.
How does most of the water needed by the plant get into its leaves?
a)
It enters through the stomata
b)
The roots absorb it and then it travels up the stem
c)
It's made during a chemical reaction in the leaf
d)
The flowers capture water and deliver it to the leaves
2.
How does carbon dioxide get into the leaves of a plant?
a)
It's absorbed by the roots
b)
It's made in a chemical reaction in the stem
c)
It enters through the stomata
d)
It goes through the flowers
3.
Which of these conditions would decrease the rate of photosynthesis in a plant?
a)
Above average precipitation
b)
Changing the daylight hours from 14 hrs to 10 hrs
c)
Changing the CO2 concentration from 380 ppm to 410 ppm
d)
All of these choices
4.
Which organisms perform Photosynthesis?
a)
Only Autotrophs
b)
Only Heterotrophs
c)
Autotrophs and Heterotrophs
5.
What molecule absorbs sunlight for photosynthesis?
a)
chloroplast
b)
thylakoid
c)
grana
d)
chlorophyll
6.
Plants need carbon dioxide from their environment to produce glucose during which stage of photosynthesis?
a)
The light-dependent stage
b)
The light-independent stage (The Calvin Cycle)
c)
The electron transport chain
d)
ATP formation
7.
Most plants appear green because chlorophyll
a)
absorbs green light.
b)
absorbs violet light.
c)
does not absorb green light.
d)
does not absorb violet light.
8.
Where do the light-dependent reactions occur?
a)
thylakoid membrane
b)
stroma
c)
mesophyll
d)
mitochondria
9.
What is the main purpose of the light reactions?
a)
To provide the energy and electrons for the calvin cycle
b)
To capture energy and make sugar
c)
To reflect green light
d)
To make sugars
10.
What supplies the electron that is lost in PS II?
a)
oxygen
b)
water
c)
glucose
d)
rubisco
11.
After reaching an excited state, electrons jump from the chlorophyll molecules to the __________.
a)
Stroma
b)
Electron transport chain
c)
Photosystem 2
d)
H+ ion reservoir
12.
In what part of photosynthesis is water broken down?
a)
The Calvin Cycle
b)
The Dark Reactions
c)
Photosystem 1 of the ETC
d)
Photosystem 2 of the ETC
13.
Match the reaction center in PSI & PSII with its name.
a)
PSI is named P700
b)
PSI is named P680
c)
PSII is named P700
d)
PSII is named P680
14.
What supplies the electrons that are lost in photosystem I (PSI)?
a)
the electrons from PS II
b)
water
c)
glucose
d)
oxygen
15.
Which molecule is ONLY produced in Cyclic electron flow:
a)
ATP
b)
O2
c)
H2O
d)
NADPH
16.
What are the two products of the light reactions that are needed for the calvin cycle?
a)
NAD and NADPH
b)
NADP + and Glucose
c)
NADPH and ATP
d)
Oxygen and NADPH
17.
Where does the Calvin Cycle occur?
a)
thylakoid
b)
stroma
c)
lumen
d)
mitochondria
18.
The molecule that comes out of the Calvin Cycle to produce glucose, and polymers like cellulose is:
a)
RuBP
b)
GP3
c)
3-PG
d)
G3P
19.
In the Calvin Cycle, which enzyme helps keep the cycle going?
a)
Hydrolase
b)
Rubisco
c)
Pepsisco
d)
Re-starterase
20.
How many G3P molecules make one molecule of glucose?
a)
1
b)
2
c)
3
d)
4
21.
What happens to the remaining G3P molecules in the last step of the Calvin Cycle?
a)
They are used to make glucose.
b)
They are reshuffled to make CO2 by adding ATP.
c)
They exit the cycle.
d)
They are reshuffled to make RuBP by adding ATP.
22.
To bring in nonliving carbon (CO2) and use it to make organic compounds is a process called _______________.
a)
carbon fixiation
b)
cellular respiration
c)
catabolic reactions
d)
mitosis
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