LC Biology - The Menstrual Cycle

Hi folks. Please copy these two diagrams for Homework and watch the clip below on the Menstrual Cycle.
Thanks
Mr Gilmartin.

The Timing of Events in the Menstrual Cycle

Hormonal Interaction in the Menstrual Cycle

LC Biology - The Menstrual Cycle

Excellent animated clip on the Menstrual Cycle, associated hormones and their functions. For LC higher level pay particular attention to the role and effects of Oestrogen, Progesterone, Follicle Stimulating Hormone (FSH) and Luteinising Hormone (LH).

Leaving Cert Biology - Human Reproduction

LC Biology - Digestion during Germination

Movement through cell membranes

Mind Map created by jamesgilmartin with GoConqr

LC - Enzymes and Inhibitors

Hi 5th Years. Please watch this clip on enzymes to help you develop topics discussed in today's class.

LC Biology - DNA Extraction

Photos from Ms Higgins' LC class where they extracted DNA from onion cells. Make sure you know all steps involved and why you do each step.

Chopping onion: 
Breaks cell walls, releasing cytoplasm.
Adding washing-up liquid:
Breaks down cell membranes, releases nuclear material from cell.
Adding salt: 
Minimise attractive forces between DNA and protein, causes DNA to clump together.
Heating mixture to 60 °C for exactly fifteen mins:
Break down of DNAses enzymes. After 15 mins DNA broken down.
Cooling mixture: 
Slowing down any other enzymes before they destroy DNA.
Blending:
Further destroys cell walls and membranes. Causes release of DNA. Blending > 3s cuts DNA strands.
Adding protease:
Breaks down proteins associated with DNA.
Filtering:
Remove large cellular debris. DNA passes through filter with liquid.
Using cold ethanol:
Forms a layer on top of onion filtrate. Alcohol draws water out of DNA molecule, making it less dense - found between two liquids. DNA insoluble in freezing cold ethanol (soluble in alcohol at room temp)
Testing for DNA:
No method of testing for DNA available for use in school labs 

6th Year Ecology Experiments

My Movie from Magh Éne College on Vimeo.

LC Biology Experiments - IAA Serial Dilutions

Anaerobic Respiration by Yeast

LC Genetics - Extraction of DNA

Recap of Extraction of DNA from Ms Higgins' 6th Year Biology class

LC Biology - Genetics

Hi there. Please watch these two clips to revise topics covered in today's Biology class.

LC Biology - Cell Continuity

Useful clips for showing Mitosis. Try to assign each of the 4 stages to the animation.

Leaving Cert Biology - Cell Continuity

Please click here to access clip on stages of Mitosis

The Cell Theory

Introduction to Bacteria

Bacteria are beneficial as well as harmful.

LC - How the Ear works

Please watch the following clip to get a better understanding of how the ear works. It is important that become familiar with the structure of the ear before you watch it.
Happy watching
Mr Gilmartin

LC Biology - Punnett Squares

LC Biology - Photosynthesis revision

Please watch the following 4 clips on Photosynthesis for revision and in answering relevant questions in the papers.

LC Biology - Cell Metabolism Experiments

Hi folks. Here is part 2 in our Cell Metabolism experiments where we analyse the effect of temperature on the rate of enzyme activity.