A2 biology glossary

It also encompasses diversity at a wider scale meaning that differences in the genetic makeup of populations is important. It A2 biology glossary possible to identify behaviour patterns which, to some extent, do seem predictable. Exocrine gland A gland that secretes molecules into a duct that carries the molecules to where they are used.

Its primary purpose is to improve the quality of life. Number[ edit ] Transcription factors are essential for the regulation of gene expression and are, as a consequence, found in all living organisms. The confusion is apparently a direct result of attempting to interpret the drawing as a 3-D object.

Reactions of metabolism that construct molecules from smaller units. Descriptive Statistics Statistics are a method of summarising and analysing data for the purpose of drawing conclusions about the data.

Extra heartbeats that are out of the normal rythm of What is elastic recoil? Remission Complete or partial disappearance of the signs and symptoms of disease in response to treatment. These transcription factors are critical to making sure that genes are expressed in the right cell at the right time and in the right amount, depending on the changing requirements of the organism.

Many large TF families form complex homotypic or heterotypic interactions through dimerization. An inhibitor that competes with a substrate to bind to active site on an enzyme 82 of What is complementary base pairing? The bulk transport of materials into cells via invagination of the cell surface membrane forming a vesicle of The widely-accepted theoretical process by which eukaryotic cells evolved from prokaryotic cells of What is the end-product inhibition?

Inferential statistics go a step further and allow us to make a conclusion related to our hypothesis.

Transcription factor

All or nothing A neurone either conducts an action potential or doesn't. A more sophisticated measure of dispersion is the standard deviation which tells us how much on A2 biology glossary scores differ from the mean. Hepatocytes These are liver cells. In the events leading up to an action potential, the membrane depolarises and reaches a threshold level, then lots of sodium ions enter the axon and an action potential is reached.

A well studied example of this are the transcription-activator like effectors TAL effectors secreted by Xanthomonas bacteria. The highly ordered sequence of events that takes place in a cell, resulting in division of the nucleus and the formation of two genetically identical daughter cell 57 of A complex system of intercellular communication 58 of What is cellulose?

In bacteria, endonucleases like RuvC resolve Holliday junctions into two separate dsDNAs by cleaving the junctions at two symmetrical sites near the junction centre. Diffusion of responsibility Diffusion of responsibility is the idea that people are less likely to intervene to help someone who seems to need it if there are others present, because they perceive responsibility as being shared between all present, and therefore see themselves as being less responsible personally.

Adenine binds to thymine or uracil and cytosine binds to guanine 83 of What is a compound light microsope? Opposite is a hydrolysis reaction 85 of A characteristic that can take any value within a range, e. A brick-red precipitate indicates a positive result 38 of What is a beta pleated sheet?

Descriptive statistics give us a way to summarise and describe our data but do not allow us to make a conclusion related to our hypothesis. MutL mediates the interaction between MutS and MutH, and enhances the endonucleasic activity of the latter. Chromosomes become visible under the light microscope when cells are preparing to divide 70 of The transport system of an animal 71 of The mass proliferation of antibody-producing cells by clonal selection 72 of What is clonal selection?

Movement of substances through the cell walls and cell spaces by diffusion and into cytoplasm by active transport 22 of An abnormal rhythm of heart. All responses are accompanied by commentaries which highlight their respective strengths and weaknesses, giving students an insight into the mind of the examiner.

It is found on the inside of the cell surface membrane. Negative Feedback A process that brings about a reversal of any change in conditions.Buy Admission Assessment Exam Review E-Book: Read Kindle Store Reviews - cheri197.com Search the world's information, including webpages, images, videos and more.

Google has many special features to help you find exactly what you're looking for. Key word lists in full for all topics and then a document for each topic so that pupils can fill in the key terms.

Would be good for revision or at the end of a topic or give out at the beginning of a topic and get pupils to fill through as you 5/5(26).

GCSE Farming Glossary. Absentee Landlords: land owners who live away from their estate, often in an urban cheri197.com take rent from their tenant farmers but may make little contribution in return. (See Tenant Farmer). Agribusiness: large-scale capital-intensive, commercial farming.

Agricultural: to do with cheri197.com work of growing crops or. Negative Feedback - the system which maintains a condition in the body within a narrow range by detecting and counteracting a change bringing the level back to normal.

Receptors - used to detect deviations from the norm. Effector - carries out response which brings about a corrective change. cheri197.com As and a Level Biology B Core Practical 15 Sampling Methods (Student, Teacher, Technician Worksheets) A level guide to practical cheri197.com

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A2 biology glossary
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