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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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