DNA: The Molecule Of Life! Trivia Quiz

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DNA: The Molecule Of Life! Trivia Quiz - Quiz


DNA is the genomic material in cells that contains the genetic information used in the development and functioning of all known living organisms. DNA is essential for life. It is responsible for the storage and reading of genetic information. DNA is protected by proteins and has several repair mechanisms. It is a double-stranded molecule that forms a double helix. This quiz is all about DNA. Don't worry, you can do it. Just go for it.


Questions and Answers
  • 1. 

    The structure of DNA is described as _______________.

    • A.

      A single stranded helix

    • B.

      A double stranded helix

    • C.

      A single stranded straight line

    • D.

      A double stranded straight line

    Correct Answer
    B. A double stranded helix
    Explanation
    The structure of DNA is described as a double stranded helix because it consists of two strands that are twisted around each other in a spiral shape. This helical structure allows the DNA molecule to be compact and stable, while also providing a mechanism for easy replication and transmission of genetic information.

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  • 2. 

    A nucleotide consists of a ________, _________, and _________.

    • A.

      Sugar, phosphate, and base

    • B.

      Sugar, phosphate, and oxygen

    • C.

      Oxygen, phosphate, and base

    • D.

      Oxygen, base, and Nitrogen

    Correct Answer
    A. Sugar, phosphate, and base
    Explanation
    A nucleotide is composed of three components: a sugar molecule, a phosphate group, and a nitrogenous base. The sugar molecule provides the backbone of the nucleotide, the phosphate group connects the sugar molecules together, and the nitrogenous base attaches to the sugar molecule. Oxygen is present in the sugar molecule, but it is not one of the three main components of a nucleotide.

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  • 3. 

    DNA is found inside the __________of eukaryotic cells. 

    • A.

      Endoplasmic reticulum

    • B.

      Ribosome

    • C.

      Cytoplasm

    • D.

      Nucleus

    Correct Answer
    D. Nucleus
    Explanation
    DNA is found inside the nucleus of eukaryotic cells. The nucleus is the control center of the cell and contains the genetic material, including DNA. This is where DNA replication, transcription, and other important cellular processes related to DNA occur. The other options, such as endoplasmic reticulum, ribosome, and cytoplasm, do not contain DNA.

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  • 4. 

    The structure of DNA was successfully discovered by ______________.

    • A.

      Hershey and Chase

    • B.

      Watson and Crick

    • C.

      Chargaff

    • D.

      Oswold Avery

    Correct Answer
    B. Watson and Crick
    Explanation
    Watson and Crick successfully discovered the structure of DNA. They proposed the double helix model in 1953, which explained how DNA is composed of two strands that are twisted together in a spiral shape. Their discovery was based on the work of other scientists, including Rosalind Franklin's X-ray crystallography images of DNA. Watson and Crick's model provided a breakthrough understanding of how genetic information is stored and passed on in living organisms.

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  • 5. 

    During DNA replication, which enzyme is responsible for breaking the hydrogen bonds between the base pairs.

    • A.

      Ligase

    • B.

      DNA polymerase

    • C.

      Helicase

    • D.

      DNA primase

    Correct Answer
    C. Helicase
    Explanation
    Helicase is the enzyme responsible for breaking the hydrogen bonds between the base pairs during DNA replication. This enzyme unwinds the double helix structure of DNA by breaking the hydrogen bonds, allowing the DNA strands to separate and serve as templates for the synthesis of new DNA strands. Helicase plays a crucial role in the process of DNA replication by ensuring that the DNA strands are properly separated and accessible for replication to occur.

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  • 6. 

    Where does transcription occur inside the cell?

    • A.

      Nucleus

    • B.

      Cytoplasm

    • C.

      Ribosome

    • D.

      None of the above

    Correct Answer
    A. Nucleus
    Explanation
    Transcription is the process of synthesizing RNA from a DNA template. It occurs inside the nucleus of a cell. This is because the nucleus contains the DNA, which serves as the template for RNA synthesis. The RNA molecules that are produced during transcription are then transported out of the nucleus and into the cytoplasm, where they can undergo further processing and translation to produce proteins. The ribosome, although involved in protein synthesis, is not the site of transcription. Therefore, the correct answer is the nucleus.

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  • 7. 

    In a DNA molecule, which base always pairs up with Adenine?

    • A.

      Andenine

    • B.

      Thymine

    • C.

      Guanine

    • D.

      Cytosine

    Correct Answer
    B. Thymine
    Explanation
    Thymine always pairs up with Adenine in a DNA molecule. This is because of the complementary base pairing rule in DNA. Adenine forms two hydrogen bonds with Thymine, creating a stable base pair. This pairing is essential for DNA replication and the transmission of genetic information. Guanine pairs up with Cytosine in a similar manner.

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  • 8. 

    What is the complementary side to this DNA molecule? ATTCCGG

    • A.

      ATTCCGG

    • B.

      TAAGGCC

    • C.

      CAAGGCC

    • D.

      UAAGGCC

    Correct Answer
    B. TAAGGCC
    Explanation
    The complementary side to a DNA molecule refers to the sequence of nucleotides that can pair with the given sequence through base pairing rules. In DNA, adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G). Therefore, the complementary side to the DNA molecule ATTCCGG would be TAAGGCC, as it follows the base pairing rules.

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  • 9. 

    How many bases make up a codon?

    • A.

      1

    • B.

      2

    • C.

      3

    • D.

      4

    Correct Answer
    C. 3
    Explanation
    A codon is a sequence of three nucleotides that codes for a specific amino acid or a stop signal during protein synthesis. In the genetic code, there are a total of 64 possible codons. Since each codon is made up of three bases, the correct answer is 3.

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  • 10. 

    Which type of mutation is shown below? Original DNA:  ATTACCG Mutated DNA:  ATTCCG

    • A.

      Point Mutation

    • B.

      Frameshift Insertion

    • C.

      Frameshift Deletion

    Correct Answer
    C. Frameshift Deletion
    Explanation
    The mutated DNA sequence shows a deletion of one nucleotide, resulting in a frameshift mutation. A frameshift mutation occurs when the reading frame of the genetic code is disrupted, usually by an insertion or deletion of nucleotides. In this case, the deletion of one nucleotide shifts the reading frame, causing a change in the amino acid sequence that follows the mutation. This is different from a point mutation, which involves the substitution of a single nucleotide.

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  • Current Version
  • Mar 20, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Jun 22, 2010
    Quiz Created by
    Slewis626
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