A Basic Questions On DNA!

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A Basic Questions On DNA! - Quiz

All cells and some viruses contain DNA and this is a nucleic acid that contains the genetic instructions for the development and function of living things. DNA profiling is especially useful for solving crimes but can also be used to confirm if people are related to each other, such as for paternity testing. Test your knowledge on DNA basics by taking up the test below.


Questions and Answers
  • 1. 

    DNA is found in the ___ of a cell.

    • A.

      Nucleus

    • B.

      Ribosome

    • C.

      Mitochondria

    Correct Answer
    A. Nucleus
    Explanation
    DNA is found in the nucleus of a cell. The nucleus is the control center of the cell and contains the genetic material, including DNA. DNA carries the instructions for the development, functioning, and reproduction of all living organisms. It is stored and protected within the nucleus, where it can be accessed and used to create proteins and carry out other essential cellular processes. The ribosomes are responsible for protein synthesis, while mitochondria are responsible for energy production. However, neither of these organelles contain DNA.

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  • 2. 

    One "piece" of DNA, like pictured below, is a ___.

    • A.

      DNA

    • B.

      Nitrogen base

    • C.

      Nucleotide

    Correct Answer
    C. Nucleotide
    Explanation
    A nucleotide is a "piece" of DNA because it is one of the building blocks that make up DNA. It consists of a nitrogen base, a sugar molecule, and a phosphate group. These nucleotides are connected together to form the DNA molecule, with the nitrogen bases pairing up to create the double helix structure. Therefore, a single nucleotide can be considered as a "piece" of DNA.

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  • 3. 

    DNA contains the "____" for all your traits.

    • A.

      Lipids

    • B.

      Code

    • C.

      Errors

    Correct Answer
    B. Code
    Explanation
    DNA contains the "code" for all your traits. DNA is made up of a sequence of nucleotides, which form a code that determines the instructions for building and maintaining an organism. This code is responsible for encoding the information needed to produce proteins, which are the building blocks of cells and play a crucial role in determining an individual's traits and characteristics.

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  • 4. 

    The sides of the DNA "ladder" are alternating sugar and ___ molecules.

    • A.

      Adenine

    • B.

      Nitrogen bases

    • C.

      Phosphate

    Correct Answer
    C. Phosphate
    Explanation
    The sides of the DNA "ladder" are alternating sugar and phosphate molecules. The phosphate molecules form the backbone of the DNA molecule, connecting the sugar molecules together. The sugar-phosphate backbone provides stability and structure to the DNA molecule, while the nitrogen bases, such as adenine, are attached to the sugar molecules and form the "rungs" of the DNA ladder.

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  • 5. 

    In DNA, Adenine (A) always pairs with ________.

    • A.

      Thymine

    • B.

      Guanine

    • C.

      Cytosine

    Correct Answer
    A. Thymine
    Explanation
    In DNA, Adenine (A) always pairs with Thymine. This is because of the specific base pairing rules in DNA. Adenine and Thymine form a complementary base pair, meaning they have a specific shape and chemical structure that allows them to fit together. This base pairing is crucial for DNA replication and the accurate transmission of genetic information. The other options, Guanine and Cytosine, are also bases found in DNA, but they pair with each other, not with Adenine.

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  • 6. 

    In DNA, Guanine (G) always pairs with ________.

    • A.

      Adenine

    • B.

      Thymine

    • C.

      Cytosine

    Correct Answer
    C. Cytosine
    Explanation
    In DNA, Guanine (G) always pairs with Cytosine. This is because of the complementary base pairing rule in DNA, where Guanine forms three hydrogen bonds with Cytosine. Adenine pairs with Thymine in DNA through two hydrogen bonds. These base pairs are essential for maintaining the double helix structure of DNA and for accurate DNA replication and transcription processes.

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  • 7. 

    One "piece" of DNA (a nucleotide) consists of a sugar, phosphate and a ______.

    • A.

      Nitrogen base

    • B.

      Nucleotide

    • C.

      Double helix

    Correct Answer
    A. Nitrogen base
    Explanation
    A nucleotide is composed of a sugar, phosphate, and a nitrogen base. The nitrogen base is one of the four types: adenine (A), thymine (T), cytosine (C), or guanine (G). These nitrogen bases are crucial in determining the genetic code and sequence of DNA.

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  • 8. 

    The twisted ladder shape of DNA, shown below, is known as the ______.

    • A.

      Nucleic acid

    • B.

      Double helix

    • C.

      Hydrogen bonding

    Correct Answer
    B. Double helix
    Explanation
    The twisted ladder shape of DNA is known as the double helix. This structure consists of two strands that are twisted around each other, forming a spiral staircase-like shape. The double helix is stabilized by hydrogen bonding between complementary base pairs (adenine with thymine, and guanine with cytosine). This unique structure allows DNA to store and transmit genetic information.

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  • 9. 

    DNA stands for ______.

    • A.

      Deoxyribonucleic Acid

    • B.

      Deoxyribose Sugar Phosphate

    • C.

      Do Not Applaud

    Correct Answer
    A. Deoxyribonucleic Acid
    Explanation
    DNA stands for Deoxyribonucleic Acid, which is a molecule that contains the genetic instructions used in the development and functioning of all known living organisms. It is composed of two long chains of nucleotides twisted into a double helix structure. The nucleotides in DNA are made up of a sugar called deoxyribose, a phosphate group, and a nitrogenous base. The correct answer, Deoxyribonucleic Acid, accurately describes the molecular composition and function of DNA.

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  • 10. 

    The "rungs" or steps of the DNA "ladder" consist of molecules that we use letters for (A, T, C and G).  Those letters are ____.

    • A.

      Nitrogen bases

    • B.

      Nucleotides

    • C.

      Phosphates

    Correct Answer
    A. Nitrogen bases
    Explanation
    The correct answer is nitrogen bases. The "rungs" or steps of the DNA "ladder" are made up of molecules called nitrogen bases. These nitrogen bases include adenine (A), thymine (T), cytosine (C), and guanine (G). These bases pair together to form the double helix structure of DNA. Nucleotides, on the other hand, are the building blocks of DNA and RNA and consist of a nitrogen base, a sugar molecule, and a phosphate group. Phosphates, on the other hand, are a component of the DNA backbone, but they are not the molecules that make up the "rungs" of the DNA ladder.

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  • Nov 16, 2023
    Quiz Edited by
    ProProfs Editorial Team
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    Jrich1971
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