Gene Expression

• What are proteins made of?

  Amino Acids
• How many amino acids are there?

  20
• What join amino acids together?

  Peptide Bonds
• Name the five types of proteins.

  Sructural, enzymes, hormones, antibodies and receptors
• What are the two stages of protein synthesis?

  Transcription and translation.
• Three types of RNA?

  mRNA, tRNA, rRNA
• What is RNA made up of?

  Phosphate, Base and Ribose sugar
• How many strands does RNA have?

  One strand.
• Whats the four bases of RNA?

  Adenine - Uracil, Guanine - Cytosine
• What does mRNA stand for?

  Messanger RNA
• What does tRNA stand for?

  Transfer RNA
• What does rRNA stand for?

  Ribosomal RNA
• Where and what is mRNA made from?

  Its formed in the nucleus from free nucleotides
• What does mRNA do?

  mRNA carries the genetic information from DNA to the ribosomes for protein synthesis.
• What does tRNA carry to the ribosome?

  Specific amino acid
• What are the two main features of tRNA?

  Anticodon and an Attachment Site
• What do rRNA molecules combine with?

  Protiens
• What does RNA Polymerase do?

  Moves along the DNA unwinding the double helix and breaking the hydrogen bonds between the bases