Question 1

The pathway of electron flow from H2O to NADP+ in photosynthesis is referred to as

Accepted Answer

A)  cooperative special pairs. 
B)  photorespiration. 
C)  the Z scheme of photosynthesis. 
D)  photophosphorylation. 
E)  None of the answers is correct. 
A)  cooperative special pairs. 
B)  photorespiration. 
C)  the Z scheme of photosynthesis. 
D)  photophosphorylation. 
E)  None of the answers is correct.

Question 2

Which of the following is an accessory pigment found in plants?

Accepted Answer

A)  plastocyanin 
B)  $\beta$-carotene 
C)  chlorophyll a 
D)  cytochrome b 
E)  None of the answers is correct. 
A)  plastocyanin 
B)  $\beta$-carotene 
C)  chlorophyll a 
D)  cytochrome b 
E)  None of the answers is correct.

Question 3

How are thylakoid membranes unique?

Accepted Answer

A)  They contain only 10% phospholipids. 
B)  They contain 40% galactolipids. 
C)  They have equivalent amounts of protein and lipid. 
D)  They contain only 10% phospholipids, and they have equivalent amounts of protein and lipid. 
E)  All the answers are correct. 
A)  They contain only 10% phospholipids. 
B)  They contain 40% galactolipids. 
C)  They have equivalent amounts of protein and lipid. 
D)  They contain only 10% phospholipids, and they have equivalent amounts of protein and lipid. 
E)  All the answers are correct.

Question 4

How is a chloroplast similar to a mitochondria?

Accepted Answer

Both are sites for ATP synthesis.Both ha

Question 5

After P960 absorbs light,what are the next few steps in bacterial photosynthesis?

Accepted Answer

Excitation of the P960 leads t

Question 6

Write out the general chemical reaction for photosynthetic production of carbohydrates and oxygen.

Accepted Answer

CO₂ + H₂O +l

Question 7

Describe the arrangement of the photosynthetic assemblies in the thylakoid membranes.

Accepted Answer

Photosystem I and ATP synthase

Question 8

The process in which a positive charge forms on one molecule by the loss of a electron which has been excited by light,and a negative charge forms on another by the gain of an electron is referred to as _____________________________________.

Accepted Answer

photoinduc

Question 9

Complete the following reaction for photosystem I (be sure to balance the reaction with regard to the electrons):Pc(Cu+)+ Fdox + light $\rarr$

Accepted Answer

A)  Pc(Cu+) + Fdox + light$\rarr$ Pc (Cu+) + (Cu+) Fdred 
B)  Pc(Cu+) + Fdox + light $\rarr$ Pc (Cu2+) + Fdred 
C)  Pc(Cu+) + Fdox + light $\rarr$ Pc + Fdred(Cu2+) 
D)  Pc(Cu+) + Fdox + light $\rarr$ Pc- (Cu3+) + Fdred 
E)  None of the answers is correct. 
A)  Pc(Cu+) + Fdox + light$\rarr$ Pc (Cu+) + (Cu+) Fdred 
B)  Pc(Cu+) + Fdox + light $\rarr$ Pc (Cu2+) + Fdred 
C)  Pc(Cu+) + Fdox + light $\rarr$ Pc + Fdred(Cu2+) 
D)  Pc(Cu+) + Fdox + light $\rarr$ Pc- (Cu3+) + Fdred 
E)  None of the answers is correct.

Question 10

Bacterial reaction centers are analogous to

Accepted Answer

A)  photosystem I. 
B)  photosystem II. 
C)  succinate dehydrogenase. 
D)  photosystem I and photosystem II. 
E)  All of the answers are correct. 
A)  photosystem I. 
B)  photosystem II. 
C)  succinate dehydrogenase. 
D)  photosystem I and photosystem II. 
E)  All of the answers are correct.

Question 11

How is it possible to make ATP without generating NADPH?

Accepted Answer

In cyclic photophosphorylation,the elect

Question 12

______________________ is the term for a bacteriochlorophyll that has two protons instead of a magnesium ion at its center.

Accepted Answer

The answer of ______________________ is the term for a bacteriochlorophyll...

Question 13

Humans do not produce energy by photosynthesis.Why,then,is this process critical to our survival?

Accepted Answer

The products of phot

Question 14

What is the principal photoreceptor in chloroplasts of green plants?

Accepted Answer

A)  $\beta$-carotene 
B)  chlorophyll a 
C)  chlorophyll b 
D)  pheophytin 
E)  phycocyanin 
A)  $\beta$-carotene 
B)  chlorophyll a 
C)  chlorophyll b 
D)  pheophytin 
E)  phycocyanin

Question 15

How is charge recombination of BPh- and P960+ suppressed in bacterial photosynthesis?

Accepted Answer

Several factors are key.First,another ac

Question 16

Photosystem II responds to wavelengths of light shorter than _____ nm.

Accepted Answer

A)  450 
B)  520 
C)  580 
D)  650 
E)  680 
A)  450 
B)  520 
C)  580 
D)  650 
E)  680

Question 17

In bacterial photosynthesis,what is one way in which the proton gradient is created?

Accepted Answer

A)  reduction of a quinone that causes uptake of two protons from the cytoplasm 
B)  the reduction of NADPH 
C)  the transfer of protons from NADH across the membrane via a shuttle system 
D)  the conversion of H2O to H+ 
E)  None of the answers is correct. 
A)  reduction of a quinone that causes uptake of two protons from the cytoplasm 
B)  the reduction of NADPH 
C)  the transfer of protons from NADH across the membrane via a shuttle system 
D)  the conversion of H2O to H+ 
E)  None of the answers is correct.

Question 18

What is another name for the CF1-CF0 complex?

Accepted Answer

A)  ATP synthase 
B)  photosystem I 
C)  photosystem II 
D)  ferredoxin- NADP+ reductase 
E)  cytochrome bf complex 
A)  ATP synthase 
B)  photosystem I 
C)  photosystem II 
D)  ferredoxin- NADP+ reductase 
E)  cytochrome bf complex

Question 19

What is the original source of electrons used to neutralize the special pair in photosystem II?

Accepted Answer

A)  reduced cytochrome bf 
B)  NADH 
C)  H2O 
D)  membrane lipids 
E)  ferredoxin 
A)  reduced cytochrome bf 
B)  NADH 
C)  H2O 
D)  membrane lipids 
E)  ferredoxin

Question 20

Why are chlorophylls good candidates for photoreceptors?

Accepted Answer

The conjugated network of sing

Exam 19: The Light Reactions of Photosynthesis

The pathway of electron flow from H2O to NADP+ in photosynthesis is referred to as

Which of the following is an accessory pigment found in plants?

How are thylakoid membranes unique?

How is a chloroplast similar to a mitochondria?

After P960 absorbs light,what are the next few steps in bacterial photosynthesis?

Write out the general chemical reaction for photosynthetic production of carbohydrates and oxygen.

Describe the arrangement of the photosynthetic assemblies in the thylakoid membranes.

The process in which a positive charge forms on one molecule by the loss of a electron which has been excited by light,and a negative charge forms on another by the gain of an electron is referred to as _____________________________________.

Complete the following reaction for photosystem I (be sure to balance the reaction with regard to the electrons):Pc(Cu+)+ Fdox + light →\rarr→

Bacterial reaction centers are analogous to

How is it possible to make ATP without generating NADPH?

______________________ is the term for a bacteriochlorophyll that has two protons instead of a magnesium ion at its center.

Humans do not produce energy by photosynthesis.Why,then,is this process critical to our survival?

What is the principal photoreceptor in chloroplasts of green plants?

How is charge recombination of BPh- and P960+ suppressed in bacterial photosynthesis?

Photosystem II responds to wavelengths of light shorter than _____ nm.

In bacterial photosynthesis,what is one way in which the proton gradient is created?

What is another name for the CF1-CF0 complex?

What is the original source of electrons used to neutralize the special pair in photosystem II?

Why are chlorophylls good candidates for photoreceptors?

Biochemistry: An Evolving Science

Protein Composition and Structure

Exploring Proteins and Proteomes

DNA, RNA, and the Flow of Genetic Information

Exploring Genes and Genomes

Exploring Evolution and Bioinformatics

Hemoglobin: a Portrait of a Protein in Action

Enzymes: Basic Concepts and Kinetics

Catalytic Strategies

Regulatory Strategies

Carbohydrates

Lipids and Cell Membranes

Membrane Channels and Pumps

Signal-Transduction Pathways

Metabolism: Basic Concepts and Design

Glycolysis and Gluconeogenesis

The Citric Acid Cycle

Oxidative Phosphorylation

The Calvin Cycle and the Pentose Phosphate Pathway

Glycogen Metabolism

Fatty Acid Metabolism

Protein Turnover and Amino Acid Catabolism

The Biosynthesis of Amino Acids

Nucleotide Biosynthesis

Biosynthesis of Membrane Lipids and Steroids

The Integration of Metabolism

DNA Replication, repair, and Recombination

RNA Synthesis and Processing

Protein Synthesis

The Control of Gene Expression in Prokaryotes

The Control of Gene Expression in Eukaryotes

Sensory Systems

The Immune System

Molecular Motors

Drug Development

Filters

The pathway of electron flow from H₂O to NADP⁺ in photosynthesis is referred to as

Complete the following reaction for photosystem I (be sure to balance the reaction with regard to the electrons):Pc(Cu⁺)+ Fd_ox + light $\rarr$

How is charge recombination of BPh^- and P960⁺ suppressed in bacterial photosynthesis?

What is another name for the CF₁-CF₀ complex?