Biology 1202B Lecture Notes - Lecture 8: Anoxygenic Photosynthesis, Accessory Pigment, Atp Synthase

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maroontortoise225

1 Mar 2019

School

Western University

Department

Biology

Course

Biology 1202B

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Photoautothrophs- use photons as a source of energy to make their own food. Carbon in carbon dioxide in the air. The rst organisms to perform oxygenic photosynthesis. Anoxygenic photosynthesis- using other molecules such as h2s and fe2+ as electron donors. Biproducts- sulfur & iron in another form. Easy to break this bond & use the energy to do work. G3p is the starting point of all molecules. Photosystem ii- the only thing that can oxidize water. Capture light energy by pigment molecules and energy used to synthesize both atp and. Water split, electrons passed on to nadp+, converted to nadph. Atp made from atp synthase, energy to make atp comes from photons. Both of these together are required for the calvin cycle to function. Electrons carried by nadph and atp energy used to convert co2 from inorganic to organic form. Atp made in the chloroplast stays in the chloroplast. The rest of the cell is getting atp through cellular respiration.

Related Questions

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.

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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

Phototrophs need an electron source like H₂S orH₂O. Where do the electrons from these sources go?(Assume the organism is growing autotrophically as well astophototrophically.)

	O₂ and CO₂
	O₂ only
	CO₂ only
	Sulfate or oxygen
	Inorganic various molecules, depending on cellular needs.

Which of the following statements about chlorophyll istrue?

	It is a good electron acceptor in its oxidized form.
	It is a good electron donor in its reduced form when energizedby light.
	It contains magnesium.
	It is a tetrapyrrole.
	All of the above

The unifying feature of all photosynthetic organisms isa(n)

	electron transfer chain.
	electron donating system to generate NADPH.
	ATP-generating system.
	light-gathering system.
	All of the above

Evidence suggests that banded iron formations are due to

	chemical oxidation of reduced iron, Fe²⁺.
	aerobic reduction of insoluble ferric iron, Fe(OH)₃.
	anaerobic oxidation of soluble ferrous iron,Fe²⁺.
	Both a and b
	Both a and c

In addition to their ability to harvest light in the 400 to 500nm range, carotenoids also

	eject electrons from the reaction center.
	function as a tetrapyrrole.
	intercept toxic single-state oxygen.
	transfer electrons to ubiquinone.
	raise electrons to a higher energy state.

Ribosomal RNA and other cell features affirm that living cellsshould be divided into three groups called domains.

	True
	False

Microbes have started to evolve recently.

	True
	False

The ________ was essential for the evolution of oxygenicphotosynthesis.

	evolution of cyanobacteria
	development of photosystem I
	ability to extract electrons from CO₂
	ability to extract electrons from H₂O
	ability to use oxygen as the terminal electron acceptor

What do oxygenic phototrophs use as an electron source?

	Oxygen
	Sulfide
	Water
	Organic compounds
	CO₂

10.

Three domains of organisms have been established basedprimarily on size and other structural features of the cells.

	True
	False

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Biology 1202B Lecture Notes - Lecture 8: Anoxygenic Photosynthesis, Accessory Pigment, Atp Synthase

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