DNA Test Corrections pt 2

When does a polypeptide chain stop forming?

• When the DNA molecule tells it to

• When tRNA is released by the ribosome

• When the ribosome reaches a stop codon

• When mRNA releases the polypeptide chain

A segment of mRNA contains the following codons  AUG CAA GGU GAG .  Which are the complentary tRNA anticodons?

• 
  TAC GTT CCA CTC

• UAC GUU CCA CUC

• UAC GUU CCU GUG

• AUG CAA GGA GAG

Which is true of a human and a dog?

• 
  Uracil is found in human RNA as well as in dog RNA

• Uracil is found in human DNA as well as dog DNA

• Uracil is found in human RNA and not in dog RNA

• Uracil is found in human DNA and not dog DNA

This is an mRNA sequence:  AUC GGA CCA CAG  Which DNA stand was the mRNA sequence transcribed from?

• 
  ATC GGA CCA CAG

• TAG CCT GGT GTC

• UAG CCU GGU GUC

• 
  UAC GGA CCU CUG

During which process is mRNA formed?

• 
  Transcription

• Replication

• Translation

• Mutation

A section of DNA with bases A - T - T - C - G - C will line up with which complentary bases pairs during replication?

• 
  T A A G G C

• 
  T A A G C G

• 
  A T T  C G C

• U A A G C G

Which of the following describes a mutation where a nitrogen base gets added or deleted to a segment of DNA?

• 
  Point

• Frame Shift

• Substitution

• 
  Removal

In living things, similar substances are linked to make up larger substances.  Which of the following correctly describes a larger substance made by linking small substances?

• Nucleotides are linked to make up DNA

• Amino acids are linked to make up DNA

• Proteins are linked to make up nucleotides

• Nucleotides are linked to make up proteins

During the process of transcription, a DNA sequence of ATG TCA would code for which mRNA sequence?

• TAC AGT

• UTC TGU

• UAC AGU

• AUG UCA

Which nitrogenous base is found only in mRNA?

• 
  Adenine

• 
  Cytosine

• Thymine

• 
  Uracil