AQA Biology A-Level - DNA, Genes and Chromosomes QP PhysicsAndMathsTutor.com
Q1.
This question is about mitosis in cells.
The image below shows the arrangement of the genetic material in a cell during
prophase.
(c) Name the fixed position occupied by a gene on a DNA molecule.
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(1)
(d) Describe how a gene is a code for the production of a polypeptide. Do not
include information about transcription or translation in your answer.
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(3)
Page 1 of 8
, AQA Biology A-Level - DNA, Genes and Chromosomes QP PhysicsAndMathsTutor.com
Q2.
(b) Define the term exon.
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___________________________________________________________
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(1)
The table below shows mRNA codons for some amino acids.
Serine Proline Glycine Threonine Alanine
UCU CCU GGA ACU GCA
UCC CCA GGG ACC GCG
(c) Figure 1 shows the DNA template nucleotide base sequence that
determines the sequence of four amino acids.
Figure 1
AGG CGT CCT GGA
Use information from the table and Figure 1 to give the amino acid
sequence determined by this sequence of nucleotides.
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(1)
Page 2 of 8
Q1.
This question is about mitosis in cells.
The image below shows the arrangement of the genetic material in a cell during
prophase.
(c) Name the fixed position occupied by a gene on a DNA molecule.
___________________________________________________________
(1)
(d) Describe how a gene is a code for the production of a polypeptide. Do not
include information about transcription or translation in your answer.
___________________________________________________________
___________________________________________________________
___________________________________________________________
___________________________________________________________
___________________________________________________________
___________________________________________________________
___________________________________________________________
___________________________________________________________
___________________________________________________________
(3)
Page 1 of 8
, AQA Biology A-Level - DNA, Genes and Chromosomes QP PhysicsAndMathsTutor.com
Q2.
(b) Define the term exon.
___________________________________________________________
___________________________________________________________
___________________________________________________________
(1)
The table below shows mRNA codons for some amino acids.
Serine Proline Glycine Threonine Alanine
UCU CCU GGA ACU GCA
UCC CCA GGG ACC GCG
(c) Figure 1 shows the DNA template nucleotide base sequence that
determines the sequence of four amino acids.
Figure 1
AGG CGT CCT GGA
Use information from the table and Figure 1 to give the amino acid
sequence determined by this sequence of nucleotides.
___________________________________________________________
(1)
Page 2 of 8
