[Maximum number: 1]
The diagram shows mRNA codons.
The mRNA sequence UGGAACGUA codes for what amino acid sequence?
A
Glycine-Glutamine-Methionine
B
Methionine-Glutamine-Glycine
C
Threonine-Valine-Histidine
D
Tryptophan-Asparagine-Valine
Question rangeD1.2.9—Using genetic code table
[Maximum number: 1]
The table shows the genetic code.
2nd base in codon
Which mRNA could code for the sequence Ser-Leu-Arg-Phe?
A
UCA UCG UGG UUU
B
UCC ACC AGA UUC
C
UCU CCC AGA UUU
D
UCG CUG AGG UUC
[Maximum number: 1]
Which sequence of bases and amino acids could be produced by transcription and translation of the DNA molecule shown?
Sequence of bases
Sequence of amino acids
UAC-UUU-ACG-AAA-GCG-CCC
Leu-Lys-Cys-Phe-Arg-Gly
GGG-CGC-UUU-CGU-AAA-CAU
Gly-Arg-Phe-Arg-Lys-His
AUC-AAA-UGC-UUU-CGC-GGG
Met-Lys-Cys-Phe-Arg-Gly
UAC-UUU-ACG-AAA-GCG-CCC
Tyr-Phe-Thr-Lys-Ala-Pro
2nd base in codon
[Maximum number: 8]
A short base sequence of mRNA and a table of the genetic code are shown below.
Sequence of mRNA
AUGAGCCGAAGGUAGCUG
Table of the genetic code
(a)
Outline the function of codons.
[ 1 ]
(b)
(i)
Determine the sequence of amino acids that could be translated from the sequence of mRNA.
[ 1 ]
(ii)
Determine the DNA base sequence transcribed to form this sequence of mRNA.
[ 1 ]
(c)
Suggest a hypothesis that accounts for the slightly different meaning of some codons in a very limited number of organisms.
[ 1 ]
(d)
The diagram shows a section of a polypeptide.
[ 2 ]
(i)
Annotate the diagram to show a peptide bond between two amino acids.
[ 1 ]
(ii)
State the type of reaction that removes water while linking amino acids together to form polypeptides.
[ 1 ]
(e)
Outline the function of Rubisco and of spider silk in relation to their three-dimensional conformation.
[ 2 ]
[Maximum number: 1]
The table shows some codons for five amino acids.
Which of these DNA strands will code for the amino acid sequence glycine-serine-glycine?
A
CCUUCGCCG
B
CCTTCGCCG
C
GGAAGCGGA
D
CCUUCGCCU
[Maximum number: 1]
Which sequence of mRNA bases and amino acids could be produced by transcription and translation of the DNA molecule shown?
3' AAAGTGGCACGTATATTT 5'
5' TTTCACCGTGCATATAAA
Sequence of mRNA bases
Sequence of amino acids
UUU-GAG-GCU-CGA-UAU-UUU
Phe-Glu-Ala-Arg-Tyr-Phe
AAA-CUC-CGA-GCU-AUA-UUU
Lys-Leu-Arg-Ala-lle-Phe
UUU-CAC-CGU-GCA-UAU-AAA
Phe-His-Arg-Ala-Tyr-Lys
AAA-GUG-GCA-CGU-AUA-UUU
Lys-Val-Ser-Arg-Ile-Phe
[Maximum number: 1]
Which sequence of bases and amino acids could be produced by transcription and translation of the DNA molecule shown?
Sequence of bases
Sequence of amino acids
UAC-UUU-ACG-AAA-GCG-CCC
Leu-Lys-Cys-Phe-Arg-Gly
GGG-CGC-UUU-CGU-AAA-CAU
Gly-Arg-Phe-Arg-Lys-His
AUC-AAA-UGC-UUU-CGC-GGG
Met-Lys-Cys-Phe-Arg-Gly
UAC-UUU-ACG-AAA-GCG-CCC
Tyr-Phe-Thr-Lys-Ala-Pro
[Maximum number: 1]
The table shows the genetic code.
Which mRNA could code for the sequence Met-Ser-Leu-Arg-Phe?
A
AUG UCA UCG UGG UUU
B
AUG UCC ACC AGA UUC
C
AUG UCU CCC AGA UUU
D
AUG UCG CUG AGG UUC