Part A How does a point mutation for an enzyme affect the order of amino acids in that protein? Match the words in the left column to the appropriate blanks in the sentences on the right. Make certain each sentence is complete before submitting your answer. Reset Help RNA mRNA the same different base If the resulting codon codes for amino acid, there is no effect. If the replacement of a in DNA changes the amino acid coded for by the codon, then the order of amino acids will be sugar Submit Provide Feedback Solution ***************************First Blank Will Be Filled By _____mRNA_______******************** ___________________________________________________________________________________________ Interestingly, not all regions of an mRNA molecule correspond to particular amino acids. In particular, there is an area near the 5\' end of the molecule that is known as the untranslated region (UTR) or leader sequence. This portion of mRNA is located between the first nucleotide that is transcribed and the start codon (AUG) of the coding region, and it does not affect the sequence of amino acids in a protein. ____________________________________________________________________________________________ ******************* *Second blank will be filled by ___base______* ************************************8 ____________________________________________________________________________________________ This option is quite easy as point mutation takes place when base of DNA is replaced. ___________________________________________________________________________________________ ************ Third blank will be __different_____ and fourth will be __the same_________****************** _________________________________________________________________________________________ Although a base substitution alters only a single codon in a gene, it can still have a significant impact on protein production. In fact, depending on the nature of the codon change, base substitutions can lead to three different subcategories of mutations. The first of these subcategories consists of missense mutations , in which the altered codon leads to insertion of an incorrect amino acid into a protein molecule during translation; the second consists of nonsense mutations , in which the altered codon prematurely terminates synthesis of a protein molecule; and the third consists of silent mutations , _______ _in which the altered codon codes for the same amino acid as the unaltered codon.____ _______________________________ .

1. Part A How does a point mutation for an enzyme affect the order of amino acids in that protein?
Match the words in the left column to the appropriate blanks in the sentences on the right. Make
certain each sentence is complete before submitting your answer. Reset Help RNA mRNA the
same different base If the resulting codon codes for amino acid, there is no effect. If the
replacement of a in DNA changes the amino acid coded for by the codon, then the order of
amino acids will be sugar Submit Provide Feedback
Solution
***************************First Blank Will Be Filled By
_____mRNA_______********************
______________________________________________________________________________
_____________
Interestingly, not all regions of an mRNA molecule correspond to particular amino acids. In
particular, there is an area near the 5' end of the molecule that is known as the untranslated
region (UTR) or leader sequence. This portion of mRNA is located between the first nucleotide
that is transcribed and the start codon (AUG) of the coding region, and it does not affect the
sequence of amino acids in a protein.
______________________________________________________________________________
______________
******************* *Second blank will be filled by ___base______*
************************************8
______________________________________________________________________________
______________
This option is quite easy as point mutation takes place when base of DNA is replaced.
______________________________________________________________________________
_____________

2. ************ Third blank will be __different_____ and fourth will be __the
same_________******************
______________________________________________________________________________
___________
Although a base substitution alters only a single codon in a gene, it can still have a significant
impact on protein production. In fact, depending on the nature of the codon change, base
substitutions can lead to three different subcategories of mutations. The first of these
subcategories consists of missense mutations , in which the altered codon leads to insertion of
an incorrect amino acid into a protein molecule during translation; the second consists of
nonsense mutations , in which the altered codon prematurely terminates synthesis of a protein
molecule; and the third consists of silent mutations , _______ _in which the altered codon
codes for the same amino acid as the unaltered codon.____
_______________________________