Name 2 differences between Meiosis and Mitosis

• Mitosis happens in every body cell, meiosis happens only in the reproductive organs

  Meiosis forms haploid cells, mitosis forms diploid cells
• What are the 4 bases?

  Adenine (a), Cytosine (c), Thymine (t), Guanine
• What is a nucleotide?

  A nucleotide is made up of 1 sugar molecule, one phosphate molecule and 1 nitrogen base(A,T,C,G)

  A nucleotide is a monomer of DNA
• Describe the process of Transcription.

  DNA unzips: causes a template strand(copied strand)

  mRNA is copied onto other DNA strand.

  New DNA sequence is

  A T

  T A

  C G

  G C

  mRNA leaves the nucleus through a nuclear pore and attaches to a ribosome(cytoplasm)
• Describe the process of Translation

  Ribosome order amino acids in the correct sequence to form proteins

  Happens in the cytoplasm:

  mRNA binds to the ribosome (3 bases=1 codon)

  tRNA delivers the correct amino acid to the ribosome by matching its anti-codon to mRNA's codon.

  amino acids joined together forms a polypeptide