The starter and exit quiz of the lesson “Mutations and genetic variants”, from the unit “DNA and the genome” (Year 10 Science) by Oak National Academy.
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Oak National Academy
12 questions
DNA has two nucleic acid chains, each made from nucleotides. The chains are held together because subunits of the nucleotides pair up. Which subunits of a nucleotide molecule pair up?
True or false? An mRNA molecule has two nucleic acid strands.
Which of these statements is true?
The protein myoglobin is found in muscles and is made from a chain of 153 amino acids. How many nucleotide bases code for this chain of amino acids?
Which of these statements is true?
The table shows the four triplet codes that code for the amino acid Val. A change to which of the three bases could cause this triplet to code for an amino acid other than Val?
What is the best description of the genetic code?
This is part of a genetic code: **TAC CAG TCA CAG**. A mutation changes the code to **TAC CAT TCA CAG**. What kind of mutation has taken place?
Who best describes a genetic variant?
Match each word to its correct meaning.
Mutations change the genetic code in a gene. A change to the gene can change the structure of the ___ that is made when the code is read.
Deletion mutations have a greater effect on the genetic code than substitution mutations. Why?
