OCR A Level Biology Test Papers Solved Correctly Latest Bundle 2024!

Order of classification - Answer Domain kingdom phylum class order family genus species How the binomial naming system works - Answer First word is the genus, second word is the species, words are in Latin Advantages of the binomial naming system and classification as a whole - Answer Di...

What is excretion? - Answer The removal of metabolic waste from the body What are the 3 main metabolic waste products of the body? - Answer 1. Carbon Dioxide 2. Bile Pigments 3. Urea What blood vessel brings oxygenated blood to the liver? - Answer Hepatic artery What does the hepati...

oncotic pressure - Answer The tendency for water to move into the blood by osmosis, as the result of the presence of plasma proteins in the capillary. 'Lub' sound of the heartbeat - Answer AV valves closing 'Dub' sound of the heartbeat - Answer SL valves closing Artery walls - how...

Site of glycolysis - Answer Cytosol NAD - Answer Nicotinamide adenine dinucleotide Main steps in glycolysis - Answer Phosphorylation lysis phosphorylation dehydrogenation formation of ATP What happens in the first step of glycolysis (Phosphorylation)? - Answer 2 ATP molecules are hy...

Role of neurones - Answer To transmit electrical impulses rapidly around the body to allow the organism to respond to changes in internal and external environment Parts of a general neurone - Answer Cell body, Dendron, axon, Role of the cell body - Answer To produce neurotransmitters ...

What are hormones? - Answer Chemical messengers which travel in the blood to activate target cells What are endocrine glands? - Answer Ones which secrete hormones into the blood to reach the target organ What are 8 examples of endocrine glands? - Answer 1. Endocrine pancreas 2. Testes ...

Mutation - Answer A change in the genetic material which may affect the phenotype of the organism Substitution - Answer A mutation where one or more nucleotides are substituted for another in a DNA strand Deletion - Answer A mutations where one or more nucleotides are deleted and lost fr...

5.1.1 COMMUNICATION AND HOMEOSTASIS - Answer 5.1.1 COMMUNICATION AND HOMEOSTASIS why do multicellular organisms need communication systems? e.g hormonal, nervous - Answer So they can respond to changes in the internal and external environment + coordinate the activities of different organs...

(a) What is a membrane? - Answer Structure that separates the contents of cells from their environment (a) What is compartmentalisation? - Answer The formation of separate membrane-bound areas in a cell (a) Why do certain organelles need to be compartmentalised? - Answer Metabolism inclu...

Pathogen - Answer An organism that causes disease Examples of pathogens - Answer Bacteria Protoctists Fungi Viruses Communicable Diseases - Answer Diseases that can spread between organisms Diseases caused by bacteria - Answer Tuberculosis Bacterial meningitis Ring Rot Disea...

Prophase 1 - Answer -Chromosomes condense -Nuclear envelope disintegrates -Homologus chromosomes pair up and cross ov Metaphase 1 - Answer -Homologous pairs line up -Independent assortment Anaphase 1 - Answer -Homologous chromosomes pulled to opposite poles -Chromatids stay joined...