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    Learn English > English lessons & exercises > All about DNA > Stats updated every 4 hours
    To go back to the exercise

    Exercise "All about DNA", created by val92 (a free exercise to learn English):
    Results of the 2 854 people who have taken this test:
    Average mark: 47.5 / 100 Share


    Latest member with a 100/100 (perfect mark): sway / CANADA, on Friday 10 January - 14:18:
    ":)"


    They got a perfect mark


    Stats (2854 candidates)
    Question 1 passed: 57 %
    DNA (which stands for *) is one of the most important elements in living cells.

    Question 2 passed: 35.1 %
    DNA can be compared to the programming code in a computer. Indeed, DNA contains all the information necessary for *.

    Question 3 passed: 35.2 %
    DNA is composed of two large * which interact with each other.

    Question 4 passed: 52.3 %
    The DNA shape is special and looks like a *.

    Question 5 passed: 63.7 %
    That special structure was identified by two English-speaking * in 1953.

    Question 6 passed: 83.7 %
    They received a * for that scientific discovery in 1962.

    Question 7 passed: 48.8 %
    Each strand of the helix is composed of a series of small molecules called * which are linked to one another. There are four different nucleotides: adenine, guanine, cytosine and thymine.

    Question 8 passed: 32.7 %
    The sequence of nucleotides is very important and defines the *.

    Question 9 passed: 42.6 %
    Each living * has its own genome which encodes different proteins.

    Question 10 passed: 25.9 %
    The * is used to translate the DNA sequence into a protein sequence.

    Question 11 passed: 38.8 %
    Proteins are composed of small blocks called *. The length of the proteins varies from 50 to 25000 amino acids.

    Question 12 passed: 38.1 %
    Proteins are used by organisms to structure cells, to form different cellular * such as liver, lung or brain. But proteins also play a crucial role in regulating cell functions.

    Question 13 passed: 43.8 %
    Each cell is regulated differently, so * is more expressed in blood cells than in neuron for example.

    Question 14 passed: 43.9 %
    A single * in the DNA induces a modification of the protein.

    Question 15 passed: 49.8 %
    That modification can be responsible for *. The appearance of those diseases can be prevented by adopting a healthy lifestyle.


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