Questions 9 to 13 are in reference to the DNA sequence shown in Question 8. Here is...

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Biology

Questions 9 to 13 are in reference to the DNAsequence shown in Question 8.

Here is Question 8.

Question 8:

The top strand of the following segment of DNA serves as thetemplate strand:

3’ TACACCTTGGCGACGACT 5’

5’ ATGTGGAACCGCTGCTGA 3’

We will refer to this segment of DNA as the original (orunmutated) sequence.

Please answer the following questions:

(a) What is the mRNA sequence?

The mRNA sequence is  5'  3'.

**Please enter your sequence in the 5' to 3' direction.Deductions will be made if a sequence is inputted in the wrongdirection.**

(b) Using the mRNA sequence you determined in part (a)of this question, give the sequence of the protein that would betranslated.

The amino acid sequence for this protein isN-terminus  C-terminus.

**Please note**

The N-terminus refers to the beginning of the primary sequencefor a protein, and the C-terminus refers to the end of the primarysequence for a protein.

i.e. input the amino acids in the order that they would betranslated.

If a codon encodes for a stop codon, type STOP.

When inputting your sequence, separate each amino acid with ahyphen (e.g. Ser-Tyr-STOP).

You will need to consult the genetic code to answer thisquestion.

Question 10:

The original (unmutated) DNA sequence (shown above in Question8) has been mutated to the following (this represents the templatestrand):

3’ TACGACCTTGGCGACGACT 5’

We will refer to this sequence as mutation#2.

Please note that for simplicity only the template strand forthis mutated segment of DNA is shown.

Answer the following questions:

(a) What is the complete mRNA sequence for the mutatedsegment mutation #2?

The mutated mRNA sequence is  5'  3'.

**Please enter your sequence in the 5' to 3' direction.Deductions will be made if a sequence is inputted in the wrongdirection.**

(b) Using the mRNA sequence you determined in part (a)of this question, give the sequence of the protein that would betranslated.

The amino acid sequence for this protein isN-terminus  C-terminus.

**Please note**

The N-terminus refers to the beginning of the primary sequencefor a protein, and the C-terminus refers to the end of the primarysequence for a protein.

i.e. input the amino acids in the order that they would betranslated.

If a codon encodes for a stop codon, type STOP.

When inputting your sequence, separate each amino acid with ahyphen (e.g. Ser-Tyr-STOP).

You will need to consult the genetic code to answer thisquestion.

4 points   

QUESTION 11

Questions 9 to 13 are in reference to the DNAsequence shown in Question 8.

Question 11:

The original (unmutated) DNA sequence (shown above in Question8) has been mutated to the following (this represents the templatestrand):

3’ TACACCTTAGCGACGACT 5’.

We will refer to this sequence as mutation#3.

Please note that for simplicity only the template strand forthis mutated segment of DNA is shown.

Answer the following questions:

(a) What is the complete mRNA sequence for the mutatedsegment mutation #3?

The mutated mRNA sequence is  5'  3'.

**Please enter your sequence in the 5' to 3' direction.Deductions will be made if a sequence is inputted in the wrongdirection.**

(b) Using the mRNA sequence you determined in part (a)of this question, give the sequence of the protein that would betranslated.

The amino acid sequence for this protein isN-terminus  C-terminus.

**Please note**

The N-terminus refers to the beginning of the primary sequencefor a protein, and the C-terminus refers to the end of the primarysequence for a protein.

i.e. input the amino acids in the order that they would betranslated.

If a codon encodes for a stop codon, type STOP.

When inputting your sequence, separate each amino acid with ahyphen (e.g. Ser-Tyr-STOP).

You will need to consult the genetic code to answer thisquestion.

4 points   

QUESTION 12

Questions 9 to 13 are in reference to the DNAsequence shown in Question 8.

Question 12:

(1 mark each)

In reference to the original sequence (shown in Question 8),classify each type of mutation present from Questions 9 to 11.Choose the best option for each.

mutation #1

mutation #2

  

mutation #3

A.

base substitution - silent mutation

B.

insertion - frameshift mutation

C.

deletion - frameshift mutation

D.

base substitution - missense mutation

E.

base substitution - nonsense mutation

QUESTION 13

Questions 9 to 13 are in reference to the DNAsequence shown in Question 8.

Question 13:

Most mutations have a neutral effect on the phenotype, functionor survival of an organism because they do not elicit anynoticeable change. Whereas other mutations can have a positiveeffect on an organism leading to new versions of proteins that helpan organism adapt to changes in its environment; while othermutations can have a negative effect on the organism and result ina protein that does not function normally or at all.

Answer the following questions based on the responsesyou gave above in Questions 8 to 12.

(a) Based on the protein sequences that were produced as aresult of mutation #1, mutation #2, or mutation #3, describe theeffect, if any, these mutations would likely have on the functionof the protein within the cell. Support your answer.

(b) If these mutations occurred within a germline cell and not asomatic cell, how would the effects of these mutations differ?

Answer & Explanation Solved by verified expert
3.7 Ratings (654 Votes)
The DNA sequence encoding the above 5 amino acids is included within the sequence below 5AACCGAATTCCATGTTATAGC3 3TTGGCTTAAGGTACAATATCG5 You isolate and sequence the following two different    See Answer
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