Protein Synthesis and Mutations

Which of the following statements best describes why a change in only one DNA nucleotide base of a gene on the DNA strand could result in an incorrect protein being produced by the gene?

• The change prevents mRNA from being made.

• The change causes cells to divide in an uneven way.

• The change creates an additional mRNA strand.

• The change alters the amino acid sequence coded for by the

  gene.

Tags

NGSS.HS-LS1-1

NGSS.HS-LS1-6

NGSS.HS-LS3-2

What mutation has occurred here? 
T-G-A-C-C-A
T-G-A-G-C-A

• Substitution

• Deletion

• Insertion

• Frameshift 

Tags

NGSS.HS-LS3-2

ATTTGAGCC- Original
ATTGAGCC - Mutated
The example above is an example of a 

• Insertion- Frameshift

• Deletion- Substitution

• Deletion -Frameshift

• All of the above

Tags

NGSS.HS-LS3-2

The main function of tRNA is to...

• carry a message that, when translated, forms proteins

• form a portion of ribosomes

• string together complementary RNA and DNA strands

• bring amino acids from the cytoplasm to the ribosomes

What type of substitution mutation has no effect

on amino acids sequence

• Insertion Mutation

• Translocation

• Silent Mutation

• Deletion Mutation

Tags

NGSS.HS-LS3-2

• A

• B

• C

• D

Answer explanation

Convert the DNA strand (you know it's DNA because it uses "T") into RNA -->

RNA strand: AUGUCCCACGAUGGGUGA

AA: Met,Ser,Hist, Asp, Gly, STOP

Tags

NGSS.HS-LS1-1

Use the mRNA below to select the correct amino acid sequence:

AUG-UCA-AAA-UAG

• MET-SER-LYS-STOP

• MET-THR-LYS-TYR

• LEU-SER-CYS-STOP

• ILE-LYS-SER-STOP

Tags

NGSS.HS-LS1-1

Which mutation will cause translation to stop?

• Mutations 1 and 3 only

• Mutation 1 only

• Mutation 2 only

• Muations 1, 2, 3

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-2

Which of these shows an example of an insertion mutation?

Tags

NGSS.HS-LS3-2

The codon CCU codes for what amino acid?

• Isoleucine

• Stop

• Methionine

• Proline