Mutated DNA Sequence #3 T A C A C C T TAG C GACGACT... What's the mRNA sequence? (Circle the change) amino acid sequence? Will there likely be effects? What type of mutation is this?

1. (a)How many amino acids are found in the polypeptide when the mRNA is translated? mRNA 5 - AAUAUGCGGAUGCCCGAA -3     4     5     6     7 (b) "In this mutation, the UGG codon is replaced with UGA."     missense mutation     nonsense mutation     silent mutation     frameshift mutation

i struggled with my homework and i need help

A. In transcription, a region of DNA opens up. One strand, the template strand, serves as a template for synthesis of a complementary RNA transcript. The other strand, the coding strand, is identical to the RNA transcripf in sequence, except that it has uracil (U) bases in place of thymine (T) bases. Given the following piece of messenger RNA (MRNA): CCUGCAGUAUGAAACGCCUGGUAGAAGGUGGGAAGUGGUGCGCC... Answer the following questions. 1. List the complementary non-coding DNA sequence. This refers to the template strand. (Please insert a space every after three letters for easy checking of your papers. Thank you.) 2. List the DNA strand sequence complementary to the template strand. This refers to the coding strand. (Please insert a space every after three letters for easy checking of your papers. Thank you.) 3. List the amino acid sequence of the protein coded for. (Please insert a space every after one amino acid for easy checking of your papers. Thank you.)

5

Sickle cell hemoglobin DNA CACGTAGACTGAGG ACAC.. Sickle cell hemoglobin MRNA Sickle cell hemoglobin AA sequence 4. What type of mutation is this? Please explain why.

G T-A what's called a FRAMESHIFT mutation, meaning the reading "frame" čhanging the amino acid sequence from this point forward G-Cc A-u SUBSTITUTION (one base is substituted for another) --- If a substitution changes the amino acid, it's called a MISSENSE mutation --- If a substitution does not change the amino acid, it's called a SILENT mutation --- If a substitution changes the amino acid to a "stop." it's called a NONSENSE mutation Complete the boxes below. Classify each as Deletion, Insertion or Substitution AND as either frameshift, missense, silent or nonsense (Hint: Deletion & Insertion will always be frameshif Original DNA Sequence: TACA C C T T G G C G A CGAC T ... MRNA Sequence: Au GduGilAAdk GcuadiGA stait -TrP Pen-frg-cys stop Amino Acid Sequence: Mutated DNA Sequence #1 TA C»A(T C•T T G•G C GªA C G' A C T.. What's the mRNA sequence? AUGOUTAGOAAC•CECOUGIC•UEIA amino acid sequence? Will there likely be effects? yes (Circle th metootop What type of mutation is this? NONSense…

Can you explain it?

1 point Before we start the actual translation process. If we look at our transcript from sequence I, we can predict how long the polypeptide will be. 544545-33454454 Find the Open reading frame. Then tell me how many amino acids are in this poly-peptide? Provide a single integer Type your answer... A8885-349953-

DNA: 5’-CTCTACTATAAACTCAATAGGTCC-3’ Draw a box around the sequence where RNA polymerase will bind to the DNA. What is this sequence called? Will transcription start at this sequence, to the left of this sequence (“upstream”) or, to the right of this sequence (“downstream”)? Draw a small arrow above the DNA strand where transcription will begin. Which DNA strand will RNA polymerase transcribe? Highlight this strand with your highlighter. (Hint: RNA pol is similar to DNA pol because it can only make new RNA in the 5’ to 3’ direction. Draw in an arrow to show the direction that RNA polymerase will move along the DNA strand.