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Question
The general flow of electrons in plant photosynthesis is from PSII to PSI. Which of the following correctly explains the events that occur during this process?a. The oxidation of water occurs at PSI with the electrons being passed to ferredoxin to reduce NADP+.
b. Protons are pumped into the lumen at PSII during water reduction and also by the cytochrome bf complex allowing for ATP synthesis to occur.
c. A cyclic flow of electrons is created between ferredoxin, cytochrome bf complex, and PSI that allows for the production of NADPH without the generation of ATP.
d. For each electron removed from a water molecule, 2 photons are required to transfer it to ferredoxin.
e. None of the above
Answer
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Related questions
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b. Hsp90; un-; chaperonin
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d. Hsp40; partially; Hsp70
e. Hsp60; partially; Hsp40
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b. neurofibrillary tangles of polymeric microtubule-binding protein tau
c. extracellular deposits of amyloid-ï¢ and intracellular neurofibrillary tangles of microtubule-binding protein tau
d. mutation in the huntingtin gene
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In a class I aminoacyl-tRNA synthetase, which of the following reacts with the acyl phosphate formed during the reaction of ATP with the amino acid?a. 5'-hydroxyl of the nucleotide on the 5' end of the tRNA moleculeb. 3'-hydroxyl of the nucleotide on the 5' end of the tRNA moleculec. 2'-hydroxyl of the nucleotide on the 5' end of the tRNA moleculed. 3'-hydroxyl of the nucleotide on the 3' end of the tRNA moleculee. 2'-hydroxyl of the nucleotide on the 3' end of the tRNA molecule
Q:
Each of the following statements regarding ways in which eukaryotic protein synthesis differs from prokaryotic protein synthesis is true EXCEPT:
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c. prokaryotic and eukaryotic translation initiation differ significantly in mechanism and process
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Q:
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Q:
Termination of translation in prokaryotic cells requires:
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b. interaction of release factors with the termination codon.
c. ternary interaction of the release factor and the termination tRNA with the termination codon.
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Q:
Which of the following does not reqire GTP hydrolysis?
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Q:
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b. the tRNA that carries formylmethionine is the same tRNA for methionine
c. the formyl group donor is N10-formyl-tetrahydrofolate
d. an aminoacyl-tRNA synthetase that is specific for formylmethionine attaches formylmethionine to the tRNA
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Q:
Mitochondrial and chloroplastic ribosomes resemble ____ ribosomes.
a. prokaryotic
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c. higher eukaryotic
d. no other
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Q:
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b. asp; ala; polycationic
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d. ala; arg; polyanionic
e. arg; lys; polyanionic
Q:
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Q:
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Q:
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Q:
The genetic code is said to be degenerate, which means that:
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d. The code is universally used by virtually all species.
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Q:
The linkage between the amino acid and the tRNA in an amino-acyl tRNA complex is:
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d. an ether
e. an ester
Q:
The araBAD operon allows for the use of what metabolite by E. coli?
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c. allose
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Q:
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Q:
Transcription of a typical gene encoding a polypeptide in eukaryotes involves all of the following EXCEPT:
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b. synthesis by RNA polymerase II.
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Q:
The base-pair edges in the ____ groove act as a(n) ____ identifiable through ____ with specific proteins.
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Q:
The eukaryotic transcription factor that exhibits a sequence specificity for the TATA box is:
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Q:
All are correct about enhancer sequences in eukaryotic cells EXCEPT:
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Q:
All are characteristics of catabolic activator protein (CAP) EXCEPT:
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Q:
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Q:
The base in DNA that specifies the first base in the RNA transcript is called a(n) ____ and is numbered ____.a. promoter; -5b. enhancer; -35c. transcription start site; 0d. transcription start site; +1e. promoter complex; +5
Q:
Which of the following would most likely cause a frameshift mutation?
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b. a base analog such as 5-bromouracil
c. a chemical mutagen such as nitrous acid
d. an intercalation agent such as acridine orange
e. none of the above
Q:
Which of the following statements explains why the adenine analog, 2-aminopurine (2-AP), can cause mutations in DNA when it is inserted in place of a site normally occupied by A?
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e. none of the above
Q:
Misincorporation of all subsequent amino acids results from ____ mutations.
a. chemical
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e. all are true
Q:
Mutations in DNA may result from all of the following EXCEPT:
a. spontaneous mutations due to errors in replication.
b. physical insults on the cell, such as UV light.
c. errors in transcription.
d. chemical mutagens.
e. introduction of a base analog into DNA.
Q:
A transition mutation would be replacing A by:
a. T.
b. C.
c. U.
d. G.
e. either T or C