BIO SCI 93 Chapter Notes - Chapter 10: Photophosphorylation, Central Cross-Island Highway, Carbon Fixation

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Chemical energy of food: in autotrophic eukaryotes, photosynthesis occurs in chloroplast, organelles containing thylakoids, stacks of thylakoids form grana, photosynthesis, chloroplasts split water into h and o, incorporating the e-s of h into sugar molecules. Compare the roles of co2 and h2o in respiration and photosynthesis. General biology - photosynthesis: photosynthesis is a redox process water is oxidized carbon dioxide is reduced, the light reactions in the thylakoid membranes split water, releasing o2, producing atp, and forming. Nadph: the calvin cycle in the stroma forms sugar form co2, using atp for energy and nadph for reducing power. Co2 and h2o are the products of respiration" they are the reactants in photosynthesis. In respiration, glucose is oxidized to co2 and e-s are passed through an etc from glucose to o2, producing water. In photosynthesis, water is the source of e-s, which are energized by light, temporarily stored in nadph, and used to reduce carbon dioxide to carbohydrate.

Related Questions

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 absorption spectrum of a pigment is:

A) how strongly various wavelenghts of light that are absorbed.

B) all the wavelengths of light that are relfected

C) how much light energy is lost as heat

D) how much light energy is transformed into sugar

-What of the following are TRUE of the Calvin Cycle or light independent reactions of photosynthesis.

A) pathway that produces simple sugar

B) pathway that requires carbon dioxide, ATP, and NADPH

C) water is split and oxygen is released in the air as by-product.

D) pathway that occurs in the fluid filled stroma of the chloroplasts.

-plants have evolved to harness just one small part of the sun's energy for photosynthesis. which is it?

A) gamma rays

B) radiowaves

C) UV light

D) heat

E) visible light

-enzymes have a groove with unique shape where a specific reactants fit and bonds are broken and/or reformed to produce new products. this spot where a reaction accurs is called the:

A) substrate

B) active site

C) hot spot

D) allosteric site

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

BIO SCI 93 Chapter Notes - Chapter 10: Photophosphorylation, Central Cross-Island Highway, Carbon Fixation

BIO SCI 93 Full Course Notes

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