S2 notes edexcel

Semi-lunar valves close after blood is pumped out of the ventricles to prevent blood from returning to the ventricles. The bases are held together by a ribose sugar attached to a phosphate molecule. DNA replication is semi-conservative. Chromosomes Thread-like structures made S2 notes edexcel DNA that carry the genetic information found in the nucleus of a cell.

Concentration gradient The gradient between an area where a substance is at a high concentration and an area where it the substance is at a low concentration.

S2 Revision Notes Edexcel

Animal cells store carbohydrates as glycogen while plant store starch. No smoking S2 notes edexcel cigarettes is permitted in the school. Conservation is trying to keep all species of organisms alive.

Wind blows away the water molecules near the stomata so that a large diffusion gradient is maintained. Diffusion The net movement of particles of a gas or a solute from an area of high concentration to an area of low concentration along or down a concentration gradient.

The cones require bright light and can detect colour in detail. Glucose and most water is later reabsorbed, leaving behind a concentrated solution of salt and urea called urine. Enzymes are very specific for their substrate due to their shape.

Therefore, we recommend HK students begin preparing for the exam as early as possible. Cell specialisation is important in higher organisms because of the varying of different functions that have to be performed.

S2 Edexcel Papers

View Here The rest of the exam solutions written by us are available for purchase. Don focused his studies on International Finance and Entrepreneurship.

Single nucleotide polymorphism SNP DNA sequence variations that occur when a single nucleotide in the genome sequence is altered. Nutrients are absorbed by active transport. A baby can receive either one of the 23 pairs from its mother and either one of the 23 pairs from its father, producing genetic diversity.

A triacylglyceride is formed by the esterification of one glycerol molecule and three fatty acids. Variation can be continuous showing a range of phenotypes, such as height or discontinuous phenotypes fall into distinct categories, such as blood group.

Since the scheme of work has been checked against the model risk assessments, staff should deviate from it only if their proposed activities have been agreed with the Head of Science.

Oxidative phosphorylation A metabolic pathway that uses energy released by the oxidation of nutrients to produce adenosine triphosphate ATP. This enabled units in which you got higher UMS marks to be used for a future qualification eg: Alleles Different versions of a particular gene. Ribosomes The site of protein synthesis in a cell, found in the cytoplasm.

All our above modules are prepared following closely the exam syllabus and includes actual exam questions and detailed solutions. Adopt a consistent approach to teaching literacy skills in lessons Be familiar with, and implement a range of, strategies aimed at equipping students with the necessary literacy skills to succeed Indicate in schemes of work where skills will be explicitly taught Specific Strategies: Some organisms may prove to be useful in the future for drugs or breeding.

Linkage The increased tendency of two alleles to segregate together because their loci are on the same chromosome. Smoke causes smog and lung problems. Laboratories must be available for teacher-supervised club activities only by special arrangement.

Fermenters can be used to make mycoprotein, enzymes or drugs such as insulin. We suggest you use a copy of this text for your reference. This hormone causes more water to be reabsorbed.

These result in secondary sexual characteristics, such body hair. After ovulation, if the egg is not fertilized, the corpus luteum breaks down and menstruation occurs. Bunsen or spirit burners or candlesmake sure that ties, hair, baggy clothing, etc. Lesson preparation should be adequate and include checking on risk assessments and, where necessary, the health and safety precautions required.

Teachers in charge of courses are responsible for ensuring that technicians are familiar with the appropriate precautions needed to control any hazards which might be encountered in preparing equipment for their lessons and in clearing the equipment away.

Within the Science Department, this task is delegated to the Head of Science who has the particular function of maintaining this policy document.

Cambridge (CIE) AS and A2 Mathematics

The left side of the heart carries oxygenated blood that has returned from the lungs and is pumped to the body.International Scholars Tuition School (IST) is dedicated to providing the best 11+ Common Entrance Exams (CEE), 13+ Common Entrance Exams (CEE), 13+ Common Academic Scholarship Exams (CASE), Winchester College Entrance Exams, Eton College King’s Scholarship Exams, SSAT (Secondary School Admission Test), ISEE (Independent School Entrance Examinations), MYP.

• The events occur at random • The events are independent of each other • The average rate at which the events occur remains constant • Two or more events cannot occur at the same time.

The topics are organised according to Units S1 and S2 of Edexcel A Level, but the arrangement of topics for other boards is very similar. The notes may be useful to a student without access to a teacher or a textbook. Or possibly to a teacher looking for a quick source of.

Revision Notes June 14/04/ SDB 1 1 The Binomial distribution 3. 75% saving! Two resource packs that contain all the PowerPoints required to teach the full modules for FP2 and S2 for MEI OCR. Revision PowerPoints. S1 Notes (Edexcel) For use only in [the name of your school] S1 Note A2 notes and IGCSE / GCSE worksheets 14 NB: If we wanted to represent the interval on a stem & leaf we could not make 1 the stem since not all the numbers would begin with 1.

What we could do is .

S2 notes edexcel
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