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3 Jun 2019

Explain where the light dependent reactions occur. How many photosystems are there?

(Please answer in 3-4 complete sentences and check your grammar before submitting)

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Trinidad Tremblay
Trinidad TremblayLv2
5 Jun 2019

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Related questions

Answer the following about Respiration and Photosynthesis:

1) In a plant, which of these process (light-dependent reactions, light independent reactions) are occuring during the day?

a) Light-dependent

b)Light-independent

c)Both light dependent and light independent

d) Neither light dependent and light independent

2) In a plant, which of these process (light dependent reactions, light independent reaction) can occur during the night?

a) Light-dependent

b)Light-independent

c)Both light dependent and light independent

d) Neither light dependent and light independent

3) Is cholorophyll the only molecule that absorbs light for photosynthesis?

a) yes

b) no

4)Does cellular respiration occur in all organism types?

a) yes

b) no

5) If no oxygen was provided from the outside should oxygen level increase or decrease as time goes on when in a plant is in the dark?

a) increase

b) decrease

6) As light intensity increases, what will happen to oxygen levels?

a)increase

b) decrease

Fill in the blanks:

Cytochrome complex: also known as the cytochrome b6f complex; primary role in the light reaction to _______________________.

NADP+ reductase: enzyme that catalyzes the reaction _______.

PEP carboxylase: enzyme that catalyzes the reaction ________.

Photorespiration: describes the “alternate” reaction that can be catalyzed by rubisco. The enzymate reaction is _____________________________ and the cost to the plant is_________________________________________.


Primary electron acceptor: present in the reaction center of photosystems. Function is to _____________________________ (use oxidize and reduce in your answer).


Reaction center: where all the chemical reactions occur in a photosystem. These reactions are ____________________________________________ (for PSI and PSII)


The reason this enzyme is called rubisco is because _______________________________________________.

The complete set of reactions carried out by an organism is called:

a. anabolism

b. catabolism

c. metabolism

Value: 2

The breakdown of starch is broken down to glucose is an example of:

a. anabolism

b. catabolism

c. metabolism

Value: 3

For the following statement, determine which description best describes the process: DNA is synthesized from free nucleotides.

a. anabolism

b. catabolism

c. metabolism

Value: 4

Fill in the blank: Catabolic reactions result in the synthesis of molecules of .............via cellular respiration. This is then used to power anabolic reactions.

Value: 5

The energy in organic molecules is released in a series of steps because:

a. it is not possible to release it in a single step.

b. more total energy is released in multiple steps than would be released in a single step

c. less total energy is released in multiple steps than would be released in a single step.

d. more energy can be harvested for cellular use in multiple steps than from a single step.

-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

photosynthesis

1-The light reaction of photosynthesis does not include

a. chemiosmosis

b. oxygen liberation

c. glucose synthesis

d. electron transport

Value: 2

Photosynthesis takes place in the membranes of small sacs called

a. thylakoids

b. photosystems

c. stroma

d. photons

Value: 3

During what stage of photosynthesis is O2 produced?

a. the light-dependent reactions involving photosystems I and II

b. carbon fixation

c. the Krebs cycle

d. O2 is not produced during photosynthesis

Value: 4

The pigment molecules responsible for photosynthesis are located in the

a. mitochondria

b. cytoplasm of the cell

c. stroma of the chloroplast

d. thylakoid membrane of the chloroplast

Value: 5

During what stage of photosynthesis are ATP and NADPH converted to ADP + Pi and NADP+?

a. the light-dependent reactions

b. the light-independent reactions

c. both of the above

d. none of the above

Value: 6

What energy-rich organic compound is produced as a result of the Calvin cycle?

a. ATP

b. NADPH

c. glucose

d. H2O

Value: 7

During photosynthesis, photons raise electrons to higher energy levels. These excited electrons belong to what compound?

a. water

b. ATP

c. chlorophyll

d. electron transport chain

Value: 8

Which of the following statements accurately describes the relationship between photosynthesis and cellular respiration?

a. photosynthesis occurs only in autotrophs; cellular respiration occurs only in heterotrophs

b. photosynthesis uses solar energy to convert inorganics to energy-rich organics; respiration breaks down energy-rich organics to synthesize ATP

c. photosynthesis involves the oxidation of glucose; respiration involves the reduction of CO2

d. the primary function of photosynthesis is to use solar energy to synthesize ATP; the primary function of cellular respiration is to break down ATP and release energy


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