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BISC207 Study Guide - Final Guide: Photosynthetic Pigment, Photosystem I, Electrochemical Gradient

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lemonwolf340
19 Mar 2016
School
University of Delaware
Department
Biological Sciences
Course
BISC207
Professor
Olabisi Oyenike

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BISC207 Full Course Notes
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BISC207 Full Course Notes
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Document Summary

Photosynthesis how plants capture energy from the sun and store it in chemical bonds. Low-energy electrons derived from water are pushed to high energy levels by absorbing light energy (photons) The electrons reduce co2 carbohydrates (glucose and other organic molecules) + o2 is released (by-product) Water oxidaion spliing of water due to the release of o2. Photosystems protein-pigment complexes found in the thylakoid membrane that absorb light energy to drive redox reacions and begin the electron transport chain. Atp and nadph are the energy sources needed to synthesize carbohydrates from co2 in the calvin cycle. Also donates e- and protons (incorporated into carbohydrate) Thylakoid membrane highly folded (third) membrane located in the center of the chromosome; the site of the photosyntheic electron transport chain, where light energy chemical energy. Grana grouped stacks of the thylakoid membrane. Lumen the space inside the thylakoid discs.

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Related Questions

The electron transport chain of the light reactions is responsible for energy coupling. Which statement correctly describes the energy coupling that occurs here?

_____________________

__ The electrons will decrease in potential energy as they are passed along, and this will be used to power the active transport of hydrogen ions.
__ The reduction of oxygen at the bottom of the electron transport chain will release energy, and this will be used to synthesize ATP.
__ The conversion of NADP+ into NADPH will release energy, and this will be used to reduce carbon dioxide into glyceraldehyde-3-phosphate.
__ The facilitated diffusion of water across the thylakoid membrane will release energy, and this will be used to generate an electrochemical gradient of electrons.

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


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.