Biology Dictionary for GCSE Biology and A Level Biology

 

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

R

Recessive: An allele which is only shown in the phenotype in the absence of the dominant

 

Recombinant DNA: DNA from two different species. e.g. the human insulin gene can be spliced into bacterial DNA, producing recombinant DNA.

 

Replica plating: Growing bacteria on a series of agar plates to see which ones have been transformed (i.e. accepted new genes, such as those for antibiotic resistance)

 

Replication: The copying of DNA into two identical strands

 

Reproductive isolation: Stage 1 of speciation; when part of a population are unable to reproduce with the other part, so natural selection causes them to evolve along different lines

 

Restriction enzyme: An enzyme which cuts DNA at specific (recognition) site. Used to cut out genes in genetic engineering. Found in bacteria e.g EcoR1 comes from E coli.

 

Reverse transcriptase: Enzymes which make DNA from RNA (thus reversing transcription) Such enzymes are found in retroviruses, such as HIV

 

Ribosome: A small organelle, the site of translation in protein synthesis. 

 

RNA polymerase: An enzyme which moves along a gene, causing the assembly of mRNA on the sense strand i.e. the enzyme which controls transcription.

As I write the biology dictionary and make the videos to help you learn the definitions by listening in addition to reading them, you'll get the added benefit of hearing and learning the correct pronunciation of biological terminology - but there's more! I'm also making some interactive revision flashcards too! So you can revisit the key words when revising and really embed those a level biology definitions in your head! - The flashcards will be like this (See image below and click to download).

A-Level Biology is a whole lot easier when you know the definitions of commonly used words. This biology dictionary is here to help you learn those A level biology definitions. Remember, a good command of biological terminology (at GCSE but especially at A level) can mean the difference between a poor grade and an excellent one! Since of course you get marks awarded for using the correct biological definitions in the right context when answering exam questions and writing up lab work, coursework and assignments.

The biology dictionary is mainly aimed at a level biology students since at a level, the amount of new technical language expect is quite a lot!

 

Make learning biology definitions a regular part of your studies and keep checking in as more keywords and gcse biology definitions and a level biology definitions are added.

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*Note this A-Level biology Dictionary / Glossary of key terms is not comprehensive and will be updated and added to regularly, so keep checking in and make learning and revising a level biology definitions a consistent part of your biology studies

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