DNA Polymerase Quiz

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Preguntas clave sobre DNA Pol

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Josefina Carrillo

Argentina

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DNA Polymerase Quiz


DNA Polymerase QuizVersión en línea Preguntas clave sobre DNA Pol por Josefina Carrillo 1 What is the primary role of DNA polymerase? a To transcribe RNA into DNA b To build long DNA chains by adding nucleotides c To unwind DNA strands d To ligate Okazaki fragments e To cut DNA at specific sequences 2 Where does DNA polymerase perform its function most accurately? a In the nucleus only b At the active site with the proper substrate c In the mitochondria only d In the ribosome e At the cell membrane 3 What happens if an incorrect nucleotide is added by DNA polymerase? a The strand immediately denatures b The cell exports the error to be repaired elsewhere c DNA polymerase stops permanently d The enzyme detects, removes, and replaces it e The wrong nucleotide remains and is ignored 4 Which enzyme is commonly used in PCR for its heat tolerance? a Reverse transcriptase b Ligase polymerase c RNA polymerase d Taq polymerase e DNA ligase 5 What condition best preserves DNA polymerase activity? a Highly acidic pH b Around pH 7.4 c Extreme temperatures d Highly alkaline pH e Low salt concentration 6 What outcome is essential for DNA polymerase during replication? a Transcription of DNA into RNA b Breaking hydrogen bonds between strands c Unwinding DNA without any synthesis d Ligation of DNA fragments e Addition of complementary nucleotides to the template 7 What feature helps DNA polymerase achieve high replication accuracy? a Random nucleotide incorporation b Low substrate specificity c Proofreading and mismatch repair mechanisms d Uncontrolled exonuclease activity e Constant strand nicking during synthesis 8 What is the consequence of DNA polymerase disfunction? a Genomic instability and potentially cancer b Decreased mutation rates c Immediate cell division acceleration d Enhanced protein synthesis e Increased cloning efficiency 9 Which process directly utilizes DNA polymerase to create many DNA copies? a DNA recombination b Translation c RNA amplification d Transcription e Polymerase chain reaction (PCR) 10 Why is DNA polymerase essential for cellular life? a It only participates in transcription b It acts as a structural protein only c It exports DNA out of the nucleus d It enables DNA replication and repair e It digests DNA during apoptosis Explicación 1 DNA polymerase adds nucleotides to synthesize new DNA strands during replication. 2 Its activity requires a correctly fitting substrate at the active site to ensure accuracy. 3 Proofreading capability corrects most errors during replication. 4 Taq polymerase withstands high temperatures needed for PCR cycling. 5 Optimal activity occurs near physiological pH ~7.4. 6 Specificity ensures the correct nucleotides pair with the template. 7 Proofreading removes errors to keep DNA accurate. 8 Impaired repair leads to mutations and disease risk. 9 PCR leverages DNA polymerase to amplify sequences. 10 Without it, cell growth, healing, and reproduction are impaired.

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DNA Polymerase Quiz

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DNA Polymerase QuizVersión en línea

por Josefina Carrillo

What is the primary role of DNA polymerase?

Where does DNA polymerase perform its function most accurately?

What happens if an incorrect nucleotide is added by DNA polymerase?

Which enzyme is commonly used in PCR for its heat tolerance?

What condition best preserves DNA polymerase activity?

What outcome is essential for DNA polymerase during replication?

What feature helps DNA polymerase achieve high replication accuracy?

What is the consequence of DNA polymerase disfunction?

Which process directly utilizes DNA polymerase to create many DNA copies?

Why is DNA polymerase essential for cellular life?

Explicación