Tutorial 6
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In The Name of Allah Most Gracious Most Merciful DEPARTMENT OF HEALTH AND MEDICAL SCIENCES DEPARTMENT OF SCIENCES CENTRE FOR FOUNDATION STUDIES INTERNATIONAL ISLAMIC UNIVERSITY MALAYSIA BIOLOGY 1 HMM1414 Tutorial (CHAPTER 6) Semester 1, 2007/2008 Answer all questions on this question paper.
Name
:
……………………………………………………………………
Matric. No
:
……………………………………………………………………
Programme
:
……………………………………………………………………
Group no
:
……………………………………………………………………
For Examiner’s Use Section
Question
A
Objective
B
1
Marks
2 1 C
2
Total Marks
____________________________________________________ This question paper consists of 14 printed pages 1
SECTION A [10 marks] ___________________________________________________________ Answer all questions in the space provided at the end of each question.
1
Which type of organism obtains energy by metabolizing molecules produced by other organisms? I II III
Autotrophs Heterotrophs Decomposers
A B
I and II II and III
C D
I and III I, II, and III Answer: [
2
]
Organisms that can exist with light as an energy source and an inorganic form of carbon and other raw materials are A B C D
not exist in nature called heterotrophs called photoautotrophs best classified as decomposers Answer: [
3
Figure 1
2
]
Figure 1 shows the absorption spectrum for chlorophyll a and the action spectrum for photosynthesis. Why are they different? A B C D
Bright sunlight destroys photosynthetic pigments. Other pigments absorb light in addition to chlorophyll a. Oxygen given off during photosynthesis interferes with the absorption of light. Green and yellow wavelengths inhibit the absorption of red and blue wavelengths. Answer: [
4
Which of the following statements about the light reactions of photosynthesis are true? I II III
The splitting of water molecules provides a source of electrons. Chlorophyll (and other pigments) absorb light energy, which excites electrons. ATP is generated by photophosphorylation.
A B
I and II II and III
C D
I and III I, II, and III Answer: [
5
]
]
In the thylakoid membranes, what is the main role of the antenna pigment molecules? A B C D
synthesize ATP from ADP and Pi transfer electrons to ferredoxin and then NADPH split water and release oxygen to the reaction-center chlorophyll harvest photons and transfer light energy to the reaction-center chlorophyll Answer: [
3
]
6
The reaction-center chlorophyll of photosystem I is known as P700 because A B C D
there are 700 chlorophyll molecules in the center. this pigment is best at absorbing light with a wavelength of 700 nm. there are 700 photosystem I components to each chloroplast. the plastoquinone reflects light with a wavelength of 700 nm. Answer: [
7
All of the following are directly associated with photosystem II except A B C D
NADP+ reductase harvesting of light energy by chlorophyll P680 reaction-center chlorophyll release extraction of hydrogen electrons from the splitting of water Answer: [
8
]
What does the chemiosmotic process in chloroplasts involve? A B C D
9
]
establishment of a proton gradient reduction of water to produce ATP energy diffusion of electrons through the thylakoid membrane movement of water by osmosis into the thylakoid space from the stroma Answer: [
]
Which of the following statements best represents the relationships between the light reactions and the Calvin cycle? A B
C
D
The light reactions provide ATP and NADPH to the Calvin cycle, and the cycle returns ADP, Pi, and NADP+ to the light reactions. The light reactions provide ATP and NADPH to the carbon fixation step of the Calvin cycle, and the cycle provides water and electrons to the light reactions. The light reactions supply the Calvin cycle with CO2 to produce sugars, and the Calvin cycle supplies the light reactions with sugars to produce ATP. The light reactions provide the Calvin cycle with oxygen for electron flow, and the Calvin cycle provides the light reactions with water to split. Answer: [
4
]
10
Which of the following sequences correctly represents the flow of electrons during photosynthesis? A B C D
NADPH → O2 → CO2 NADPH → chlorophyll → Calvin cycle H2O → NADPH → Calvin cycle H2O → photosystem I → photosystem II Answer: [
5
]
SECTION B [20 marks] ___________________________________________________________ Answer all questions in the space provided.
1
The diagram below shows two phases of photosynthesis.
Figure 2
a.
Identify X. ………………………………………………………………………………………………………………… [1 mark]
b.
Briefly describe the overall function of X in photosynthesis. ………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………… [2 marks]
6
c.
State how X and Y reactions are linked during photosynthesis. ………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………… [2 marks]
2
The diagram below shows a photorespiration process in C4 plant.
Figure 3
a.
Identify the type of photosynthetic cell in I and II. I …………………………………………… II ……………………………………………. [2 marks]
7
b.
In which cell would you expect photorespiration? ………………………………………………………………………………………………………………… [1 mark]
c.
State two similarities of photosynthetic adaptations between C4 and CAM plants? ………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………….. [2 marks]
8
SECTION C [20 marks] ___________________________________________________________ Answer all questions on pages 10-14 of this question paper.
1
Explain generation of ATP during the light dependent reaction. [10 marks]
2
Describe the light independent reaction/ Calvin cycle in plant. [10 marks]
9
QUESTION 1 ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ………………………………………………………………………………………………………………………..
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QUESTION 2 ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ………………………………………………………………………………………………………………………..
12
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14
Name
:
……………………………………………………………………
Matric. No
:
……………………………………………………………………
Programme
:
……………………………………………………………………
Group no
:
……………………………………………………………………
For Examiner’s Use Section
Question
A
Objective
B
1
Marks
2 1 C
2
Total Marks
____________________________________________________ This question paper consists of 14 printed pages 1
SECTION A [10 marks] ___________________________________________________________ Answer all questions in the space provided at the end of each question.
1
Which type of organism obtains energy by metabolizing molecules produced by other organisms? I II III
Autotrophs Heterotrophs Decomposers
A B
I and II II and III
C D
I and III I, II, and III Answer: [
2
]
Organisms that can exist with light as an energy source and an inorganic form of carbon and other raw materials are A B C D
not exist in nature called heterotrophs called photoautotrophs best classified as decomposers Answer: [
3
Figure 1
2
]
Figure 1 shows the absorption spectrum for chlorophyll a and the action spectrum for photosynthesis. Why are they different? A B C D
Bright sunlight destroys photosynthetic pigments. Other pigments absorb light in addition to chlorophyll a. Oxygen given off during photosynthesis interferes with the absorption of light. Green and yellow wavelengths inhibit the absorption of red and blue wavelengths. Answer: [
4
Which of the following statements about the light reactions of photosynthesis are true? I II III
The splitting of water molecules provides a source of electrons. Chlorophyll (and other pigments) absorb light energy, which excites electrons. ATP is generated by photophosphorylation.
A B
I and II II and III
C D
I and III I, II, and III Answer: [
5
]
]
In the thylakoid membranes, what is the main role of the antenna pigment molecules? A B C D
synthesize ATP from ADP and Pi transfer electrons to ferredoxin and then NADPH split water and release oxygen to the reaction-center chlorophyll harvest photons and transfer light energy to the reaction-center chlorophyll Answer: [
3
]
6
The reaction-center chlorophyll of photosystem I is known as P700 because A B C D
there are 700 chlorophyll molecules in the center. this pigment is best at absorbing light with a wavelength of 700 nm. there are 700 photosystem I components to each chloroplast. the plastoquinone reflects light with a wavelength of 700 nm. Answer: [
7
All of the following are directly associated with photosystem II except A B C D
NADP+ reductase harvesting of light energy by chlorophyll P680 reaction-center chlorophyll release extraction of hydrogen electrons from the splitting of water Answer: [
8
]
What does the chemiosmotic process in chloroplasts involve? A B C D
9
]
establishment of a proton gradient reduction of water to produce ATP energy diffusion of electrons through the thylakoid membrane movement of water by osmosis into the thylakoid space from the stroma Answer: [
]
Which of the following statements best represents the relationships between the light reactions and the Calvin cycle? A B
C
D
The light reactions provide ATP and NADPH to the Calvin cycle, and the cycle returns ADP, Pi, and NADP+ to the light reactions. The light reactions provide ATP and NADPH to the carbon fixation step of the Calvin cycle, and the cycle provides water and electrons to the light reactions. The light reactions supply the Calvin cycle with CO2 to produce sugars, and the Calvin cycle supplies the light reactions with sugars to produce ATP. The light reactions provide the Calvin cycle with oxygen for electron flow, and the Calvin cycle provides the light reactions with water to split. Answer: [
4
]
10
Which of the following sequences correctly represents the flow of electrons during photosynthesis? A B C D
NADPH → O2 → CO2 NADPH → chlorophyll → Calvin cycle H2O → NADPH → Calvin cycle H2O → photosystem I → photosystem II Answer: [
5
]
SECTION B [20 marks] ___________________________________________________________ Answer all questions in the space provided.
1
The diagram below shows two phases of photosynthesis.
Figure 2
a.
Identify X. ………………………………………………………………………………………………………………… [1 mark]
b.
Briefly describe the overall function of X in photosynthesis. ………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………… [2 marks]
6
c.
State how X and Y reactions are linked during photosynthesis. ………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………… [2 marks]
2
The diagram below shows a photorespiration process in C4 plant.
Figure 3
a.
Identify the type of photosynthetic cell in I and II. I …………………………………………… II ……………………………………………. [2 marks]
7
b.
In which cell would you expect photorespiration? ………………………………………………………………………………………………………………… [1 mark]
c.
State two similarities of photosynthetic adaptations between C4 and CAM plants? ………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………….. [2 marks]
8
SECTION C [20 marks] ___________________________________________________________ Answer all questions on pages 10-14 of this question paper.
1
Explain generation of ATP during the light dependent reaction. [10 marks]
2
Describe the light independent reaction/ Calvin cycle in plant. [10 marks]
9
QUESTION 1 ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ………………………………………………………………………………………………………………………..
10
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11
QUESTION 2 ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………….. ………………………………………………………………………………………………………………………..
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