2.16. Which of the following partial amino acid sequences from a protein whose gene you wish...
2.16. Which of the following partial amino acid sequences from a
protein whose gene you wish
to clone would be most useful in designing an oligonucleotide probe
to screen a cDNA library?
(a) Met-Leu-Arg-Leu
(b) Met-Trp-Cys-Trp
Explain why.
Homework Answers
It is better to use b sequence, Met- Trp- Cys- Trp as an oligonucleotide probe to screen a library.
As we can see in probe A , leucine is code by multiple codon ( 6 codon)
Arg code by 6 codon
So due to these redundancy phenomenon, we have to use mixture if probe first containg all type of genetic code combination for screening point of view.
While in probe B, met code by 1 codon , Trp by 1 codon , only Cys by 2 codon. So for probe 2 we have to use only 2 forms of probe for screening a library.
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2.16. Which of the following partial amino acid sequences from a
protein whose gene you wish...
Did I answer the mRNA sequences and Amino acid sequences correctly? What types of mutations are...
Did I answer the mRNA sequences
and Amino acid sequences correctly? What types of mutations are
these? How do you do the bottom?
Part 3. Cystic Fibrosis Directions: Cystic Fibrosis is a disorder where the individuals have long and kidney problems. The disorder is caused by a mutation in one of the individual's genes. Complete the boxes below by finding the mRNA and amino acid sequence Compare the moutant DNA strands to the original strand. Circle the mutation in the...
You have a small gene that encodes the following amino acid: N-MET-ASP-SER-VAL-ALA-ARG-PHE-MET-TRP-C. There is a single...
You have a small gene that encodes the following amino acid: N-MET-ASP-SER-VAL-ALA-ARG-PHE-MET-TRP-C. There is a single mutation in the DNA that causes a change in the amino acid sequence to: N-MET-VAL-GLN-TRP-PRO-ASP-LEU-CYS-GLY-C. a) What kind of mutation is this? Explain. (2 points) b) Indicate the DNA sequence (coding strand) of the gene. Show the original DNA sequence then the mutated sequence. Wild type DNA: Mutant DNA: You have another mutation (a different mutation from the one described in parts a and...
repulsion within the protein 10. Which of the following amino acids do not contain a chiral...
repulsion within the protein 10. Which of the following amino acids do not contain a chiral carbon? a. Proline b. Alanine c. Glycine d. Phenylalanine e. Tyrosine 11. You want to determine an amino acid sequence for a particular polypeptide. So you degrade the peptid and get the following fragments. Determine the peptide sequence. Digested with typsin: Met-Val-Ser-Thr-Lys Val-lle-Trp-Thr-Leu-Met-lle Leu-Phe-Asn-Glu-Ser-Arg Digested with chymotrypsin: Asn-Glu-Ser-Arg-Val-lle-Trp Thr-Leu-Met-lle Met-Val-Ser-Thr-Lys-Leu-Phe a. Val-lle-Trp-Thr-Leu-Met-lle-Leu-Phe-Asn-Glu-Ser-Arg-Met-Val-Ser-Thr-Lys b. Val-lle-Trp-Thr-Leu-Met-lle-Met-Val-Ser-Thr-Lys-Leu-Phe-Asn-Glu-Ser-Arg c. Leu-Phe-Asn-Glu-Ser-Arg-Met-Val-Ser-Thr-Lys-Val-lle-Trp-Thr-Leu-Met-le d. Met-Val-Ser-Thr-Lys-Leu-Phe-Asn-Glu-Ser-Arg-Val-le-Trp-Thr-Leu-Met-lle e. Met-Val-Ser-Thr-Lys-Val-lle-Trp-Thr-Leu-Met-lle-Leu-Phe-Asn-Glu-Ser-Arg
Shown below are the amino acid sequences of the wild-type and three mutant forms of a...
Shown below are the amino acid sequences of the wild-type and three mutant forms of a short protein. Each mutation results from a single nucleotide change (transition/transversion / insertion / deletion). Use this information to answer the following questions. Hint: First, reconstruct as much as you can of the wild-type RNA sequence and then reference that sequence when analyzing the mutations. Wild type: met - gin-ala - ser-val - arg - phe Mutant 1: met - gln - pro-ser -...
Shown below are the amino acid sequences of the wild-type and three mutant forms of a...
Shown below are the amino acid sequences of the wild-type and three mutant forms of a short protein. Each mutation results from a single nucleotide change (transition / transversion / insertion / deletion). Use this information to answer the following questions. Hint: First, reconstruct as much as you can of the wild-type RNA sequence and then reference that sequence when analyzing the mutations. Wild type: met – gln – ala – ser – val – arg – phe Mutant 1:...
Suppose part of the amino acid sequence of a protein is N... Gly - Ala -...
Suppose part of the amino acid sequence of a protein is N... Gly
- Ala - Pro - Arg - Lys ...C. Which of the following amino acid
sequences could result from a frameshift mutation (+1 or -1) in the
part of the gene that encodes this sequence of amino acids?
Ο N... Gly - Ala - Asn - Ser - Leu ...C Ο Ν...Αla - Ala - Arg - Pro - Lys...C Ο Ν...Gly - Gly - Thr -...
How many different mRNA sequences can code for a polypeptide chain with the amino acid sequence...
How many different mRNA sequences can code for a polypeptide chain with the amino acid sequence Met - Leu - Arg? Be sure to include a stop codon. Explain your answer! 5′ ...GGAGCUCGUUGUAUU... 3′ Is this sequence RNA or DNA? How can you tell? Which amino acids are encoded, if the reading frame is as shown, starting from the correct end? What would be the effect on the amino acid sequence if the sequence were changed to 5′ GGAGACUCGUUGUAUU 3′?...
The following genomic DNA sequence comes from the first exon of a human gene and contains...
The following genomic DNA sequence comes from the first exon of a human gene and contains the 3'-end of the 5'-untranslated region and the start of a long open reading frame that codes for 200 amino acids (a.k.a. coding sequence). Note: There are no introns in this short portion and only one strand of the genomic DNA is shown. Which of the following answers lists the first three amino acids of the translated protein correctly? Seconed Position tyr ser leu...
A bacterium produces a normal protein with the following amino acid sequence : MET-VAL-HIS-LYS-ARG-THR-LEU-VAL-GLU After irradiation,...
A bacterium produces a normal protein with the following amino acid sequence : MET-VAL-HIS-LYS-ARG-THR-LEU-VAL-GLU After irradiation, a mutant strain is produced that makes a mutant protein from the same codin MET-VAL-HIS-LYS-LYS-ASN-LEU-SER-stop Show the DNA mutation that could have occurred to lead to this protein product site on DNA: e hnRNA sequence of a novel gene encodinaf
1. The following amino acid sequence is observed in an alpha-helical segment of a polypeptide: L D E N I K R N A Q L V E...
1. The following amino acid sequence is observed in an alpha-helical segment of a polypeptide: L D E N I K R N A Q L V E Q Q I R What pattern, if any, seems to characterize this sequence? Explain why this pattern might be occurring in terms of the 3D structure of the protein. 2. Indicate the probable location of the following amino acid residues in a native globular protein. a) Asp b) Phe c) Met d)...
Did I answer the mRNA sequences
and Amino acid sequences correctly? What types of mutations are
these? How do you do the bottom?
Part 3. Cystic Fibrosis Directions: Cystic Fibrosis is a disorder where the individuals have long and kidney problems. The disorder is caused by a mutation in one of the individual's genes. Complete the boxes below by finding the mRNA and amino acid sequence Compare the moutant DNA strands to the original strand. Circle the mutation in the...
repulsion within the protein 10. Which of the following amino acids do not contain a chiral carbon? a. Proline b. Alanine c. Glycine d. Phenylalanine e. Tyrosine 11. You want to determine an amino acid sequence for a particular polypeptide. So you degrade the peptid and get the following fragments. Determine the peptide sequence. Digested with typsin: Met-Val-Ser-Thr-Lys Val-lle-Trp-Thr-Leu-Met-lle Leu-Phe-Asn-Glu-Ser-Arg Digested with chymotrypsin: Asn-Glu-Ser-Arg-Val-lle-Trp Thr-Leu-Met-lle Met-Val-Ser-Thr-Lys-Leu-Phe a. Val-lle-Trp-Thr-Leu-Met-lle-Leu-Phe-Asn-Glu-Ser-Arg-Met-Val-Ser-Thr-Lys b. Val-lle-Trp-Thr-Leu-Met-lle-Met-Val-Ser-Thr-Lys-Leu-Phe-Asn-Glu-Ser-Arg c. Leu-Phe-Asn-Glu-Ser-Arg-Met-Val-Ser-Thr-Lys-Val-lle-Trp-Thr-Leu-Met-le d. Met-Val-Ser-Thr-Lys-Leu-Phe-Asn-Glu-Ser-Arg-Val-le-Trp-Thr-Leu-Met-lle e. Met-Val-Ser-Thr-Lys-Val-lle-Trp-Thr-Leu-Met-lle-Leu-Phe-Asn-Glu-Ser-Arg
Shown below are the amino acid sequences of the wild-type and three mutant forms of a short protein. Each mutation results from a single nucleotide change (transition/transversion / insertion / deletion). Use this information to answer the following questions. Hint: First, reconstruct as much as you can of the wild-type RNA sequence and then reference that sequence when analyzing the mutations. Wild type: met - gin-ala - ser-val - arg - phe Mutant 1: met - gln - pro-ser -...
Suppose part of the amino acid sequence of a protein is N... Gly
- Ala - Pro - Arg - Lys ...C. Which of the following amino acid
sequences could result from a frameshift mutation (+1 or -1) in the
part of the gene that encodes this sequence of amino acids?
Ο N... Gly - Ala - Asn - Ser - Leu ...C Ο Ν...Αla - Ala - Arg - Pro - Lys...C Ο Ν...Gly - Gly - Thr -...
The following genomic DNA sequence comes from the first exon of a human gene and contains the 3'-end of the 5'-untranslated region and the start of a long open reading frame that codes for 200 amino acids (a.k.a. coding sequence). Note: There are no introns in this short portion and only one strand of the genomic DNA is shown. Which of the following answers lists the first three amino acids of the translated protein correctly? Seconed Position tyr ser leu...
A bacterium produces a normal protein with the following amino acid sequence : MET-VAL-HIS-LYS-ARG-THR-LEU-VAL-GLU After irradiation, a mutant strain is produced that makes a mutant protein from the same codin MET-VAL-HIS-LYS-LYS-ASN-LEU-SER-stop Show the DNA mutation that could have occurred to lead to this protein product site on DNA: e hnRNA sequence of a novel gene encodinaf
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