EN - genetic molecular

Which of the following molecules is needed in order for a cell to carry out transcription? Choose all that apply.

• a.

  Free amino acids

• b.

  Free ribonucleotides

• c.

  Single-stranded RNA

• d.

  Free deoxyribonucleotides

• e.

  Double-stranded DNA

  
  

Which of the following molecules is needed in order for a cell to carry out translation? Choose all that apply.

• a.

  Double-stranded DNA

• b.

  Free ribonucleotides

• c.

  Free deoxyribonucleotides

• d.

  Single-stranded RNA

• e.

  Free amino acids

Which of the following chemical groups are identical in DNA and RNA? Choose all that apply

• 
  

  a.

  Sugar groups

• b.

  Phosphate groups

• c.

  Nitrogenous bases

In which of the following processes does a nucleic acid exhibit catalytic activity? Choose all that apply

• 
  

  a.

  RNA synthesis

• b.

  RNA splicing

• c.

  Protein synthesis

• d.

  DNA synthesis

Which of the following does a typical human gene contain? Choose all that apply

• a.

  Regulatory elements

• b.

  Promoter

• c.

  Introns

• d.

  Exons

• e. all are correct

For a typical eukaryotic gene, which of the following is normally expressed as part of the protein? Choose all that apply

• 
  

  a.

  Exons

• b.

  Introns

• c.

  Promoter

• d.

  Regulatory elements

Which of the following statements correctly describes a promoter? Choose all that appl

• a.

  A molecule that gets attached to the RNA sequence in order to facilitate protein synthesis

• b.

  A molecule that gets attached to the DNA sequence in order to facilitate RNA synthesis

• c.

  A part of the DNA sequence that facilitates RNA synthesis

• d.

  A part of the RNA sequence that facilitates protein synthesis

You are comparing brain, heart, liver, and skin cells from the same individual. Which of the following molecules would you expect to be identical between these four cell types? Choose all that apply.

• a.

  mRNA

• b.

  Protein

• c.

  rRNA

• d.

  DNA

A cell receives a signal that it needs to produce a certain protein for the first time. Which of the following processes must occur? Choose all that apply.

• a.

  Transcription

• b.

  DNA replication

• 
  

  c.

  Translation

How is a region of double-stranded DNA molecule changed during the process of transcription? Choose all that apply.

• a.

  Chemically: the deoxyribose sugar groups are changed to ribose sugar groups

• b.

  Chemically: the thymines are changed to uracils

• c.

  Structurally: the double-stranded molecule is permanently changed into single-strandsTranscription

• d.

  Structurally: the double-stranded molecule is temporarily changed into single-strands