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LC Biology
LC Biology

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LC Biology

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.
  • Data : Consists of measurements, observations/information gathered during an experiment.
  • Replicate : A repeat of an experiment.
  • Control : A comparison used to provide a standard against which the actual experiment can be judged.
  • Theory : A hypothesis that has been supported by different experiments.
  • Principle/Law : A theory that... (More)
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LC Biology

Enzymes - Sample answers 2007 - 2018

2007

WHAT IS MEANT BY IMMOBILISATION?

Means fixed in place. Immobilised enzymes are enzymes that are attached,or fixed to each other or to an inert material.

NAME A SUBSTANCE THAT IS USED TO IMMOBILISE ENZYMES?

Sodium Alginate

2 ADVANTAGES OF IMMOBILISING ENZYMES?

  • Can be reused. This is a huge advantage as the cost of replacing enzymes are very high.
  • The process of immobilising an enzyme increases its stability

ONE APPLICATION OF A NAMED IMMOBILISED ENZYME - REFER TO SUBSTRATE, PRODUCT & ENZYME.

Lactase is an immobilised enzyme in porous beads and used to convert lactose into sweeter tasting... (More)

From looking at the past papers about 90% of the marks for Biology can be gained from knowledge of all the definitions and theory. Most questions are not direct definitions but theory questions like "describe the..." and "draw the...". Direct definitions are about 20% of the paper. As the paper is mostly theory based, calculations are quite rare unlike chemistry and physics.

For chemistry on the other hand the marks are more mixed up. I would say about 55 - 60% can be gained from definitions and theory while the rest come from calculations. The first few lab experiment and... (More)

Vitamins