Genetics exam 3

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Quiz on codons and mutations

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Takeyia

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Genetics exam 3


Froggy Jumps Genetics exam 3Versión en línea Quiz on codons and mutations por Takeyia 1 What does the 5′-to-3′ direction correspond to? a The 5′-to-3′ direction in an mRNA corresponds to the C-terminal-to-N-terminal direction in the polyp b The 5′-to-3′ direction in an RNA corresponds to the N-terminal-to-C-terminal direction in the polype c The 5′-to-3′ direction in an mRNA corresponds to the N-terminal-to-C-terminal direction in the polyp 2 What are the three stop codons? a AUA, AAU,UAG b UAG, UAA, UGA c GUA, AAU, AGU 3 What is the initiation codon? a GUA b UGA c AUG 4 Which one is a frameshift mutation? a Substitution of nucleotide b Deletion of a nucleotide c Missense mutation 5 Which one is a missense mutation a Deletion of a nucleotide b Deletion of a codon c A change of an amino acid or codon 6 Which one is nonsense mutation a change a codon for an amino acid to a stop codon. b change a codon for an amino acid to a start codon. c change a nucleotide for an amino acid 7 what is transcription a DNA to RNA b RNA to DNA c Proteins to RNA 8 what signals RNA polymerase to begin transcription a Promoters b start codon c RNA polymerase 9 in eukaryotes, what is needed for the promoters a basal transcription factors/ enhancers b core enzyme c pribnow box 10 what is the Initiation of Transcription a 1st step of gene expression, RNA polymerase binds to the promoter to begin complementary RNA strand b Constructing an RNA Copy of the Gene c 1st step only in eukaryotes 11 RNA polymerase II a transcribes genes that encode proteins b transcribes genes that encode codons c transcribes codons that encode proteins 12 transcription elongation a RNA polymerase adds nucleotides to the growing RNA strand in the 5′-to-3′ direction. b RNA polymerase adds nucleotides to the growing RNA strand in the 3′-to-5′ direction. c DNA polymerase adds nucleotides to the growing DNA strand in the 5′-to-3′ direction. 13 The Central Dogma of Molecular Biology a DNA -> RNA -> Polypeptide chain b RNA -> DNA -> Polypeptide chain c DNA -> RNA 14 Initiation phase in prokaryotes a Shine-Dalgarno sequence (AGGAGG in 5’ Untranslated Region (UTR) before first AUG b Shine-Dalgarno sequence (AGGAGG in 5’ Untranslated Region (UTR) after first AUG c Shine-Dalgarno sequence (AGGAGG in 3’ Untranslated Region (UTR) before first AUG 15 Elongation phase a Addition of amino acids to C-terminus of polypeptide. b Addition of amino acids to N-terminus of polypeptide. c deletion of amino acids to C-terminus of polypeptide. 16 Histone Proteins a Provide the initial structural support for DNA compaction by forming nucleosomes. b Doesn't form chromatin c control gene expression 17 nonhistone proteins a chromosome structure, replication, and segregation, gene expression. compact chromosome b chromosome structure, replication, and segregation, gene expression. compact chromatin c chromosome structure, replication, and segregation, gene expression. compact nucleosome 18 condensin a a multisubunit complex of proteins in eukaryotic cells that compacts chromosomes during mitosis. b forms nucleosomes c form chromosomes 19 what does methylation do? a feature of silenced regions in both b feature of expressed regions in Euchromatin c feature of H2 regions in both 20 what does acetylation do? a opens chromatin and allows gene expression in Euchromatin b closes chromatin and allows gene expression in both c opens chromatin and closes gene expression in Euchromatin 21 what is Aneuploidy a is the loss or gain of one or more chromosomes b is only the loss of chromosomes c is only the gain of one or more chromosomes 22 what is Polyploidy? a the condition where an organism has more than two complete sets of chromosomes b is the loss or gain of one or more chromosomes c is the loss of sets of chromosomes

Genetics exam 3

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Genetics exam 3Versión en línea

por Takeyia

What does the 5′-to-3′ direction correspond to?

What are the three stop codons?

What is the initiation codon?

Which one is a frameshift mutation?

Which one is a missense mutation

Which one is nonsense mutation

what is transcription

what signals RNA polymerase to begin transcription

in eukaryotes, what is needed for the promoters

what is the Initiation of Transcription

RNA polymerase II

transcription elongation

The Central Dogma of Molecular Biology

Initiation phase in prokaryotes

Elongation phase

Histone Proteins

nonhistone proteins

condensin

what does methylation do?

what does acetylation do?

what is Aneuploidy

what is Polyploidy?