BIOL 1020 Lecture 16: Lecture 16

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erinchimpanzee657

12 May 2017

School

University of Manitoba

Department

Biological Sciences

Course

BIOL 1020

Professor

Joy Stacey

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BIOL 1020 Full Course Notes

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Photosynthesis 2: calvin cycle and alternative carbon fixation. Production of nadph occurs: during the light reactions only psii: obtains electrons from water. Psi: obtains electrons from psii (by way of the etc) Summary of light reactions (in the thylakoids) pigments excited by light, transfer and lose electrons to acceptor in. Psii electrons from water replace one lost to acceptor. Psi excited by light, transfer and lose electron to second etc. Psi electrons replaced by those passed from psii down first etc. Solar power generates atp (chemical energy), nadph (reducing power- important in calvin cycle) Atp and nadph produced on the side facing the stroma, where the calvin cycle takes place- which makes them available for calvin cycle. Atp synthesis occurs in the mitochondrial matrix and the stroma. Requires input of energy (atp & nadph- to reduce co2 to sugar) Each co2 attaches to a 5 carbon sugar rubp. Splits into 2- three carbon sugars glyceraldehyde- 3 phosphate.

Related Questions

Photosynthesis (Ch 8)

List the locations of the light reactions & the Calvincycle within the chloroplast and identify location on adiagram
Use the absorption spectrum of a pigment to identifywavelengths absorbed and reflected by that pigment
Describe the events of the light reactions including:

Excitation of electrons vs donation of electrons
Pathway of excited electrons through photosystem II, firstelectron transport chain, photosystem I and 2^nd electrontransport chain
Sources of electrons in photosystems I and II
ATP production using energy from an electron transportchain

List the products of the light reactions
Explain the indirect role of light reactions vs direct role ofCalvin cycle reactions in sugar production
Describe Calvin cycle events

Carbon fixation
Regeneration of CO₂ acceptor molecule (RuBP)

Explain the function of the Calvin cycle in plant cellularmetabolism
Compare & contrast electron transport and ATP synthesisbetween cellular respiration and photosynthesis

cerisegoldfish403

1. All of the following are correct descriptions of photosynthesis except:

A) The Calvin Cycle is endergonic.

B) Electrons are supplied to the reaction center via the splitting of water, which yields O2 as a byproduct

C) Chlorophyll and accessory pigments capture energy from the sun in the form of electrons, which they use to drive the electron transport chains of photosystems I and II.

D) ATP and NADPH generated in the light-dependent reactions are used to power CO2 fixation via the Calvin cycle in the light-independent reactions.

2. In glycolysis and the TCA cycle, glucose is _____ down to CO2; this process _____ lots of ATP and reducing power. In photosynthesis, CO2 is ______ back to sugar by the _______ of lots of ATP and reducing power.

A) reduced; requires; oxidized; production

B) oxidized; requires; reduced; production

C) oxidized; produces; reduced; input

D) reduced; produced; oxidized; input

3. Which description accurately compares cellular respiration and photosynthesis?

A) Photosynthesis uses energy captured from sunlight to power the reduction of carbon dioxide to sugars; cellular respiration oxidizes sugars to yield energy for the cell.

B) The ATP produced via cellular respiration is needed to power the reactions of photosynthesis

C) The pathways of photosynthesis are those of cellular respiration run in reverse.

D) Photosynthesis captures energy from sunlight to oxidize carbon dioxide to sugars; cellular respiration reduces these sugars to yield energy for the cell.

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

BIOL 1020 Lecture 16: Lecture 16

BIOL 1020 Full Course Notes

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