Ocr bio Study guides, Revision notes & Summaries

AS OCR Biology A UPDATED Exam Questions and CORRECT Answers Describe the process of protein production. - Ans 1) Proteins synthesized on ribosomes bound to ER 2) Pass into cisternae 3) Packaged in transport vesicles 4) Move to Golgi via cytoskeleton 5) Fuse with cis face 6) Modified 7) Leave through trans face

OCR Biology Exam Guide Questions and CORRECT Answers Cofactors - Ans A substance that has to be present to ensure that an enzyme catalysed reaction takes place at the appropriate rate. Cofactor - Ans Zinc being permanently bound to carbonic anahydrase is an example of what? A co-factor that together with a substrate forms then right shape to bind to the active site. - Ans What is a co-substrate?

What is the charge of oxygen in a H2O molecule? - Answer Slightly negative Draw a diagram of hydrogen bonding on paper - Answer Diagram of hydrogen bonding Why is ice less dense than liquid water? - Answer The hydrogen bonds between molecules in ice are slightly further apart than the average distance between liquid water molecules What is an advantage to living organisms of ice being less dense than water? - Answer Ice floats and forms an insulating layer on top of ponds, maint...

OCR Biology PASSED Exam Questions and CORRECT Answers Allele - Ans Different forms of a gene Loci - Ans Location of a gene on a chromosome log phase - Ans The period of exponential growth of bacterial population. lag phase - Ans "flat" period of adjustment, enlargement; little growth interspecific competition - Ans competition between members of different species What molecules travel by diffusion - Ans Small non-polar molecules

OCR Biology Biodiversity UPDATED Exam Questions and CORRECT Answers What is biodiversity? - Ans The variety of living organisms in an area. Why is biodiversity important? - Ans Biodiversity allows a balanced ecosystem. Many organisms rely on one another, they are interconnected.

OCR Biology UPDATED Exam Questions and CORRECT Answers Define magnification - Ans How much larger a displayed image is compared with the original object Define resolution - Ans The ability to distinguish between two points Why is staining used? - Ans - Some specimens are colourless - It is useful to highlight different structures - It increases contras

A revision summary of OCR A level Biology Patterns of Inheritance 6.1.2 Made by a student who achieved A* in A level Biology. Covers all the points within the OCR Biology Specification. Condenses 3 OCR specification books and class notes.

OCR Biology Paper 2 - Biodiversity and Conservation Exam Questions And Complete Answers

OCR Biology A Level (Full) Test Questions With All Correct Answers Which factors affect evolution? - CORRECT ANSWER Mutation, natural selection, sexual selection, gene flow and genetic drift What is a mutation? - CORRECT ANSWER Change in the sequence of bases in DNA What are the three ways the base sequence can be altered? - CORRECT ANSWER Substitution, deletion and insertion What is the term for a mutation where only one nucleotide is affected? - COR...