4303483
Descrição
Quiz por gyorgycrack, atualizado more than 1 year ago
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Criado por gyorgycrack
quase 9 anos atrás
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Questão 1
Questão
Which of these are substrates of transcription of DNA?
Responda
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ATP, CTP, GTP and UTP
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AMP, CMP, GMP and UMP
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ATP, CTP, GTP and TTP
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AMP, CMP, GMP and TMP
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None of these
Questão 2
Questão
What is able to do the enzyme RNA polymerase II?
Responda
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1.) Unwind the helix of DNA
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2.) Catalyze the synthesis of one molecule of DNA
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3.) Correct and error in the transcription
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1.) and 2.) are true
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All are true
Questão 3
Questão
What is a transcription factor?
Responda
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A protein that will bind to DNA and RNA polymerase
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A region in DNA sequence that will indicate where is the start of transcription
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A region in DNA sequence that will indicate where is the end of transcription
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A molecule that will induce the formation of what is called "bubble of transcription"
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One enzyme that is necessary to phosphorylate RNA polymerase
Questão 4
Questão
RNA polymerase will be phosphorylated just after the "bubble of transcription" is formed
Responda
- True
- False
Questão 5
Questão
Which of these statements is not true?
Responda
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5' capping consists in introduce a protection in the end of the non-mature RNA to avoid the degradation of DNA
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An AAA (An) tail (Non-coding end sequence) is introduced to eliminate some sequence introduced in the intron
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After RNA molecule is finished, there is going to be introduced a polyadenyl tail in the 5' end
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The intron of DNA will be cut by a process called splicing
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One exon is the area of the sequence of DNA that is transcripted and translated
Questão 6
Questão
Which codon indicate when the sequence starts?
Responda
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UUA
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UGA
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CCG
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AGA
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AUG
Questão 7
Questão
How many possible reading frames exist?
Responda
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1
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2
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3
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4
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5
Questão 8
Questão
During initiation of translation...
Responda
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mRNA is going to bind to the small ribosomal subunit
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mRNA is going to bind to the large ribosomal subunit
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An amino acid enters in the Site A of the ribosome
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Methionine is placed in the Site E of the ribosome
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An amino acid linked to a tRNA enters to the Site P of the ribosome
Questão 9
Questão
During elongation, the second amino acid in the protein will enter in the Site A of the ribosome linked to a tRNA
Responda
- True
- False
Questão 10
Questão
If a molecule of insulin is synthesized, what does it lose when it reach the place where is needed?
Responda
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Methionine
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Signal peptide
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A fragment of the sequence, because a fragmentation is done
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Its inicial n-dimensional shape (a refolding of the protein is made)
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Any of these
Questão 11
Questão
Which is the name of the molecules that refold proteins?
Responda
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Chaperons
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Aggregates
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Folders
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Cleavage factors
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Refolding factors
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