DNA & RNA Summary

Heredity: Is the passing on of features from parents to offspring by means of genes. Gene: Is a section of DNA that causes the production of a protein. Gene expression: Is the way in which the genetic information in a gene is decoded in the cell and used to make… Continue Reading →

The Basic Structure Of The Cell

“All cells are enclosed by a cell membrane. The function of the cell membrane is to hold the cell contents in place. It is also selectively permeable. This means that the membrane can select what can get into the cell and what can come out. The cell membrane is composed… Continue Reading →

What is a Cell?

“A cell is the basic unit of life. This means that we are built out of cells. A house could be built of concrete blocks. The block, in this instance, is the basic unit of the house just as the cell is the basic unit of life.”

Flashcard: Ecology – Leaving Certificate Biology Terms

ecology – the study of living things and their environments environment – everything that surrounds a living thing community – all populations that live in a certain place ecosystem – living and nonliving things in an environment, together with their interactions population – group of the same kind of organism… Continue Reading →

All Biology Definitions for Leaving Cert

The Scientific Method Scientific Method is a process of investigation where problems are identified and their explanations are tested by carrying out experiments. Observation : An unbiased, accurate report of an event. Hypothesis : An educated guess based on observations. Experiment : An experiment is designed to test a hypothesis…. Continue Reading →

Cell vs. Virus: A battle for Health

All living things are made of cells. In the human body, these highly efficient units are protected by layer upon layer of defense against icky invaders like the cold virus. Shannon Stiles takes a journey into the cell, introducing the microscopic arsenal of weapons and warriors that play a role… Continue Reading →

Flashcard: Leaving Cert Biology Cell Structure

Protoplasm – All the living parts of an animal cell/ nucleus,cytoplasm Plant Cell Wall function – Support, strengthen cell, cellulose in plant cells. Fully permeable Vacuole – Support, strengthen, stores materials( cell sap: salts, sugars, pigments) Mostly in plants Chloroplasts – Green structures in a plant where photosynthesis takes place… Continue Reading →

Flashcard: Leaving Cert Biology Cell Diversity

Tissue – Group of similar cells that perform a particular function Plant tissues – Vascular tissue: conducts water and nutrients throughout plant. Dermal: covers and protects, epidermis. Ground: photosynthesis, storage and support. Meristematic: produces new cells by mitosis. Dermal Tissue – The protective covering of plants; generally a single layer… Continue Reading →

The Operating System of Life: How Biochemistry Binds All Life Together.

Humans, octopi and pine trees alike are all made up of cells, tiny but sophisticated systems that keep life going. Cells are almost like tiny factories run by robots, with the nucleus, DNA, proteins, lipids, and vitamins and minerals all playing critical roles.