QUESTION 5 The majority of photosynthetic organisms in marine environments are u
ID: 206418 • Letter: Q
Question
QUESTION 5
The majority of photosynthetic organisms in marine environments are unicellular.
True
False
QUESTION 6
Sunlight varies in intensity throughout the day. However, as light levels increase, the light energy absorbed begins to overwhelm the capacity of the Calvin cycle to make use of NADPH. However, if the Calvin cycle runs out of NADP, the high energy electrons can damage the cell. To prevent this from happening, electrons are shunted into an alternative pathway that increases the production of ATP and decreases the production of NADPH. This alternative pathway is referred to as the [BLANK].
QUESTION 7
The photosynthetic electron transport chain connects two photosystems. BLANK supplies electrons to the beginning of the electron transport chain. When it loses an electron, it is able to pull electrons from water. BLANK energizes electrons with a second input of light energy so they have enough energy to reduce NADP to NADPH.
QUESTION 8
[BLANK] are highly reactive forms of oxygen produced when NADP is in short supply due to an increase in light energy.
QUESTION 9
The synthesis of glucose is an example of an oxidation-reduction reaction in which BLANK is reduced to glucose and BLANK is oxidized to oxygen.
QUESTION 11
[BLANK] is a biochemical process for building carbohydragtes from sunlight and carbon dioxide.
QUESTION 12
Match the following structures of chloroplast with their definition.
Thylakoids
Grana
Lumen
Stroma
Fluid-filled interior compartment that is enclosed by the thylakoid membrane
Disks that are stacked and interlinked and are connected to one another by membrane bridges
Region surrounding the thylakoid membrane where carbohydrate synthesis takes place
Individual disks surrounded by a highly folded membrane where the photosynthetic electron transport chain is located
Thylakoids
Grana
Lumen
Stroma
A.Fluid-filled interior compartment that is enclosed by the thylakoid membrane
B.Disks that are stacked and interlinked and are connected to one another by membrane bridges
C.Region surrounding the thylakoid membrane where carbohydrate synthesis takes place
D.Individual disks surrounded by a highly folded membrane where the photosynthetic electron transport chain is located
Explanation / Answer
Question 5:
The Right Answer is True
Explanation: Photosynthesis in the marine environment is due to cyanobacteria (Blue-Green algae) which is unicellular.
Question 6:
Sunlight varies in intensity throughout the day. However, as light levels increase, the light energy absorbed begins to overwhelm the capacity of the Calvin cycle to make use of NADPH. However, if the Calvin cycle runs out of NADP, the high energy electrons can damage the cell. To prevent this from happening, electrons are shunted into an alternative pathway that increases the production of ATP and decreases the production of NADPH. This alternative pathway is referred to as the cycle electron transport.
Question 7:
The photosynthetic electron transport chain connects two photosystems. photosystem II (PS II) supplies electrons to the beginning of the electron transport chain. When it loses an electron, it is able to pull electrons from water. Photosystem I (PS I) energizes electrons with a second input of light energy so they have enough energy to reduce NADP to NADPH.
Question 8:
Reactive oxygen species (ROS) are highly reactive forms of oxygen produced when NADP is in short supply due to an increase in light energy. (examples of ROS is peroxides, superoxide, hydroxyl radical, and singlet oxygen)
QUESTION 9
The synthesis of glucose is an example of an oxidation-reduction reaction in which Carbon di Oxide is reduced to glucose and Water is oxidized to oxygen.
Explanation: 6CO2+24H++24eC6H12O6+6H2O (Carbon di oxidized)
H2O1/2O2+2H++2e ( Water oxidized)
QUESTION 11
Photosynthesis is a biochemical process for building carbohydrates from sunlight and carbon dioxide.
Question 12:
Correct Arrangement is following:
Thylakoids: Individual disks surrounded by a highly folded membrane where the photosynthetic electron transport chain is located
Grana: Disks that are stacked and interlinked and are connected to one another by membrane bridges
Lumen: Fluid-filled interior compartment that is enclosed by the thylakoid membrane.
Stroma: Region surrounding the thylakoid membrane where carbohydrate synthesis takes place.