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Questions and Answers
Which of the following best describes the contribution of Rosalind Franklin to the discovery of DNA's structure?
Which of the following best describes the contribution of Rosalind Franklin to the discovery of DNA's structure?
- She identified DNA as the transformative factor responsible for passing on genetic information.
- Her work provided crucial data that Watson and Crick used to develop their double helix model, though she did not receive a Nobel Prize for it. (correct)
- She discovered the base pairing rules, noting that adenine always binds with thymine and guanine with cytosine.
- She isolated DNA for the first time and recognized it as a unique molecule.
If a strand of DNA has the sequence 5'-G-C-T-A-T-G-C-3', what would be the sequence of its complementary strand?
If a strand of DNA has the sequence 5'-G-C-T-A-T-G-C-3', what would be the sequence of its complementary strand?
- 3'-G-C-T-A-T-G-C-5'
- 5'-G-C-T-A-T-G-C-3'
- 3'-C-G-A-T-A-C-G-5' (correct)
- 5'-C-G-A-T-A-C-G-3'
During DNA replication, which enzyme is responsible for separating the double helix structure of DNA?
During DNA replication, which enzyme is responsible for separating the double helix structure of DNA?
- Polymerase
- Ligase
- Helicase (correct)
- Primase
Which statement accurately describes Chargaff's rule and its significance to DNA structure?
Which statement accurately describes Chargaff's rule and its significance to DNA structure?
A mutation occurs where a single nucleotide base is changed in a DNA sequence. Which component of the nucleotide is directly affected by this mutation?
A mutation occurs where a single nucleotide base is changed in a DNA sequence. Which component of the nucleotide is directly affected by this mutation?
Why is DNA replication essential before cell division?
Why is DNA replication essential before cell division?
Which of the following correctly pairs a nitrogenous base with its classification as either a purine or a pyrimidine?
Which of the following correctly pairs a nitrogenous base with its classification as either a purine or a pyrimidine?
Given that DNA contains the blueprint for an organism's traits, in what way does the sequence of bases directly influence these traits?
Given that DNA contains the blueprint for an organism's traits, in what way does the sequence of bases directly influence these traits?
What is the role of hydrogen bonds in the structure of DNA?
What is the role of hydrogen bonds in the structure of DNA?
How did the work of Friedrich Miescher contribute to our current understanding of DNA?
How did the work of Friedrich Miescher contribute to our current understanding of DNA?
Which of the following best describes how Watson and Crick determined the structure of DNA?
Which of the following best describes how Watson and Crick determined the structure of DNA?
Why is the process of DNA replication described as 'unzipping' in its initial phase?
Why is the process of DNA replication described as 'unzipping' in its initial phase?
How did Erwin Chargaff's work contribute to the understanding of DNA structure?
How did Erwin Chargaff's work contribute to the understanding of DNA structure?
If a DNA molecule is found to have 22% of its bases as guanine, what percentage of its bases are adenine?
If a DNA molecule is found to have 22% of its bases as guanine, what percentage of its bases are adenine?
What is the role of the enzyme helicase during DNA replication?
What is the role of the enzyme helicase during DNA replication?
During which phase of the cell cycle does DNA replication primarily occur, ensuring each daughter cell receives a complete set of genetic information?
During which phase of the cell cycle does DNA replication primarily occur, ensuring each daughter cell receives a complete set of genetic information?
Which component of a nucleotide is directly responsible for the diversity of genetic information in DNA?
Which component of a nucleotide is directly responsible for the diversity of genetic information in DNA?
Why are hydrogen bonds, rather than covalent bonds, used to link complementary base pairs in DNA?
Why are hydrogen bonds, rather than covalent bonds, used to link complementary base pairs in DNA?
Which of the following distinguishes a purine from a pyrimidine?
Which of the following distinguishes a purine from a pyrimidine?
DNA is considered the 'blueprint' for an organism. What aspect of DNA is most directly responsible for determining an organism's traits?
DNA is considered the 'blueprint' for an organism. What aspect of DNA is most directly responsible for determining an organism's traits?
Flashcards
What does DNA stand for?
What does DNA stand for?
Deoxyribonucleic Acid, the molecule containing the genetic instructions for all known living organisms.
Who is Friedrich Miescher?
Who is Friedrich Miescher?
He discovered the existence of DNA in 1869.
Who is Oswald Avery?
Who is Oswald Avery?
He discovered DNA as the “transformative factor” responsible for passing on information in 1944.
Who are James Watson and Francis Crick?
Who are James Watson and Francis Crick?
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What is the structure of DNA?
What is the structure of DNA?
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What is DNA?
What is DNA?
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What are nucleotides?
What are nucleotides?
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What are the nitrogenous bases in DNA?
What are the nitrogenous bases in DNA?
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What is Chargaff’s Rule?
What is Chargaff’s Rule?
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What is Helicase?
What is Helicase?
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What is a chromosome?
What is a chromosome?
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What is DNA's function?
What is DNA's function?
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What is a polymer?
What is a polymer?
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What is nucleic acid?
What is nucleic acid?
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What are purines?
What are purines?
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What are pyrimidines?
What are pyrimidines?
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Who is Erwin Chargaff?
Who is Erwin Chargaff?
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What are hydrogen bonds?
What are hydrogen bonds?
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What are bases?
What are bases?
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What is interphase?
What is interphase?
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Study Notes
- Chromatin is genetic material composing DNA, RNA, and proteins, forming chromosomes in eukaryotic organism nuclei.
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Description
DNA encodes an organism's genetic blueprint and is unique to each individual. It is a large polymer categorized as a nucleic acid, which consists of linked nucleotides. A nucleotide comprises phosphate, deoxyribose, and a nitrogenous base.
