DNA Test Corrections

During replication, the nucleotide sequence in a DNA molecule changed from TGC CAA CTG to TGC CCA ACTG.  What will most likely happen in the resulting protein?

• 
  It will replicate the same DNA molecule

• There will be no change in the resulting protein

• 
  The resulting protein will destroy other proteins

• 
  It will result in a difference sequence of amino acids

Which MOST directly affects the sequence of amino acids in a protein?

• The DNA in the nucleus of the cell

• The amino acids found in the cytoplasm

• The type of cell in which the protein is made

• the region on the celll in which protein is made

How can a base substitution sometimes show no change in the protein that is made, but in other cases cause problems like sickle cell disease?

• 
  Mutagens cause the sickle cell disease to appear

• Insertion of nucleotides cause sickle cell disease

• Deletion of nucleotides cause no change in affected proteins

• 
  Some amino acids have more than one codon that codes for it

Which of the following statements below indicates the correct sequence of events for protein synthesis?

• The translated DNA is transcribed into amino acids, which make up proteins

• The transcribed DNA is translated into amino acids, which make up proteins

• 
  The replicated DNA is transcribed into amino acids, which make protein

• The universal code is duplicated and later transcribed into amino acids, which make up protein

The chart represents amino acids that are coded from different combinations of mRNA codons. Which amino acid sequence can be coded from the DNA sequence:  ATG CGA TAG

• Tyrosine - Alanine - Isoleucine

• Tyrosine - Arginine - Methionine

• Tyrosine - Asparagine - Isoleucine

• Tyrosine - Arginine - Isoleucine

Using the codon chart above, what amino acid sequence would be produced from the followoing seqment of DNA?  TAT GCA TGC

• 
  Phenylalanine - Arginine - Serine

• Tyrosine - Alanine - Cysteine

• Isoleucine - Arginine - Threonine

• Lysine - Arginine - Threonine

Which BEST describes where the process of translation happens within the cell?

• 
  In the nucleus

• At a ribosome in the cytoplasm

• 
  In a mitochondria near a ribosome

• on the vacuole attached to the nucleus

For all cells where protein synthesis occurs, which base pair is found only in mRNA?

• Uracil - Adenine

• Adenine - Thymine

• Cytosine - Adenine

• Cytosine - Uracil

What is the relationship between DNA and proteins in all organisms?

• 
  The nucleotide sequence contains the instructions used to synthesize protein

• Proteins contain the instructions used to synthesize DNA and RNA

• The helical shape of DNA resembles the helical shape of some proteins that are found in all cells

• Cells are the same in all organisms, therefore there is no significant relationship between DNA and amino acids

What is the role of tRNA in protein synthesis?

• 
  To bring the amino acids to the ribosome

• To make a copy of a gene segement of DNA

• To combine with proteins to form a ribosome

• To produce mRNA and rRNA to form organelles