BIO 201 Study Guide - Midterm Guide: Photodissociation, Electrochemical Gradient, P680

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pinkseal884

25 Sep 2018

School

University at Buffalo

Department

Biological Sciences

Course

BIO 201

Professor

Hennessey

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Document Summary

Light reactions in thylakoids: convert light energy into chemical energy sored in nadph and atp, water is the first e- donor to the electron transport chain, h2o gets oxidized to o2. Dark reactions: taking co2 and making it into sugars, they need nadph and atp from the light reactions, point make carbohydrates from co2. Atp synthesis the cf1/cf0 can make atp in vitro all done in dark! If you see something as green, the wavelength green is reflected. Live functioning chloroplasts use the light, it"s passed along! Dead ones have no one to transfer the energy to, it will emit the light as heat and florescence. Absorption spectrum: you can measure the amount of light absorbed, different chlorophyll have diff wavelength profiles, a pure compound will give you an indicative wavelength. If you shine green light on a green plant, it will die, it (cid:272)a(cid:374)"t absorb green wavelength its reflected: what wavelengths are absorbed best by carotene, anything except orange.

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.

1. Pyruvic acid is produced in __________, and is the starting point for __________.

a. the Krebs cycle; the electron transport chain .

b. The Prep step; Glycolysis.

c. The Krebs cycle; Glycolysis.

d. The electron transport chain; The Prep step.

e. Glycolysis; The Prep step.

2. Which process enables glycolysis to continue to run by generating needed reactants without oxygen?

a. Aerobic respiration

b. Electron transport chain

c. Krebs cycle

d. Fermentation

e. All of the above

3. When water is oxidized by green plants, what is produced?

a. oxygen

b. carbon dioxide

c. sulfur granules

d. hydrogen sulfide

4. In cyclic photophosphorylation, the electrons

a. return to chlorophyll in PS I.

b. are used to make ATP & NADPH.

c. are energized in both PSI and PSII.

d. are converted to glucose.

5. In the Calvin-benson cycle:

a. oxygen is used to synthesize sugars.

b. carbon dioxide is used to synthesize

sugars.

c. ATP is formed.

d. light is required.

6. Light dependent reaactions:

a. capture the energy of sunlight with chlorophyll in PS I & PS II

b. make ATP & NADPH using electron transport chains

c. energize electrons in both PSI & PSII

d. include both cyclic and noncyclic pathways

e. all of the above

7. The five-carbon sugars of nucleotides are

derived from either the ______ or ______.

a.pentose phosphate pathway; Entner-Doudoroff pathway

b. pentose phosphate pathway; the Krebs cycle

c. Entner-Doudoroff pathway; glycolysis

d. glycolysis; the Krebs cycle

8. The pentose phosphate pathway provides a means to break down glucose and synthesize

a. DNA

b. six-carbon sugars.

c. peptidoglycan

d. galactose.

champagnewater-buffalo279

In a thylakoid membrane, absorbed light energy is passed from one chlorophyll molecule to another until it is:

Select one:

a. dissipated as heat.

b. released as fluorescence

c. passed to a reaction center.

Question 2

Protons in a chloroplast flow through an ATP synthase from the:

Select one:

a. cytoplasm to the intermembrane space.

b. stroma to the intermembrane space.

c. thylakoid lumen to the stroma.

d. stroma to the thylakoid lumen.

e. intermembrane space to the stroma.

Question 3

Which of the following are produced directly as a result of the movement of electrons through the photosynthetic electron transport chain?

Select one:

a. oxygen and carbohydrates

b. carbohydrates and ATP

c. ATP and NADPH

d. water and carbohydrates

Question 4

If a mutation occurs such that photosystem II no longer functions as efficiently as it should, what might be most directly affected?

Select one:

a. The amount of H2O produced.

b. The rate at which NADPH is produced.

c. The rate at which protons are transported into the stroma.

d. The rate of ATP synthesis by ATP synthase in the chloroplast.

BIO 201 Study Guide - Midterm Guide: Photodissociation, Electrochemical Gradient, P680

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