• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Discuss how chromosomal DNA is organized in the nuclei of eukaryotic cells. What is the relevance of this for regulation of gene expression? How does DNA packaging/organization change during the cell cycle?

Extracts from this document...

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Genetics, Evolution & Biodiversity section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Genetics, Evolution & Biodiversity essays

  1. Marked by a teacher

    An Investigation into the Mitotic Nuclear Division of Allium Sativum Root Tip Cells, and ...

    5 star(s)

    The potential of broken glass to cause detriment to the investigators. Any breakage of glass during the experiment can be highly dangerous to the investigators; especially the fragile, yet razor sharp microscope slides and coverslips. Any breakage of glassware should be reported to the relevant technician or member of staff.

  2. Recombinant DNA, genetically engineered DNA prepared in vitro by cutting up DNA molecules and ...

    Oncogenes are derived from normal genes that belong to a class of genes known as proto-oncogenes. In their normal state, proto-oncogenes participate in important regulatory functions such as cellular signalling and activation of transcription. At some point during the life of a cell, however, these normal genes may become damaged and assume a dangerous role.

  1. Cell Theory - Discuss the theory that living organisms are composed of cells.

    Chlorophyll: main photosynthetic pigment 2.8.4 Outline the differences in absorptions of red, blue and green light by chlorophyll. Chlorophyll absorption: * absorption peak at 440 nm (violet) * absorption peak at 675 nm (red) * green least absorbed; * longer blue wavelengths absorbed * shorter blue wavelengths not absorbed 2.8.5

  2. GENE EXPRESSION

    Place the tubes in ice. 4. Using a sterile loop, pick up a single colony of bacteria from your starter plate. Place the single colony into tube A and immerse the loop into the solution. Spin the loop between your index finger and thumb until the colony is dispersed into the solution (no floating chunks).

  1. Mechanisms for Controlling Eukarytotic Gene Expression.

    Finally RNA polymerase II is unable to bind directly to the promoter sequence of DNA, it requires other proteins to initiate transcription. This provides great complexity and control to the process of transcription. Transcription Factors. The promoter is a sequence of DNA near the 5' end of the coding region where RNA polymerase begins transcription.

  2. Chromosomes and DNA

    DNA is a very large molecule (polymer) made from smaller molecules (monomers) called nucleotides. There are different kinds of nucleotide in a DNA molecule. A nucleotide is made of a nitrogenous base, a pentose sugar (a 5-carbon sugar) and a phosphate group The structure of DNA The DNA molecule has two chains of nucleotides.

  1. Explain how DNA fingerprinting works.

    Children and adults have varying degrees of mental retardation or learning disabilities, behavioral and emotional problems including slurred or broken speech, inability to control anger and other emotions and sensitivity to loud noises. People affected with fragile X do not look much different from their peers.

  2. Regulation of gene expression in prokaryotes and eukaryotes.

    Hence when lactose concentration is high, it induces the transcription of the operon. Once the substrate has all been metabolized, the repressor is able to bind to the operator once more, preventing unnecessary transcription of the genes. Catabolite repression In addition to the regulatory system described above, there is another mechanism for ensuring optimal substrate metabolism.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work