This resource covers the general structure of a bacterial cell and a virus. It also briefs about structures of different viruses such as tobacco mosaic virus, lambda phage ,HIV and ebola virus. There is also an explanation for lytic and lysogenic pathways of virus replication.
ARTICLE TITLE:“How personalized medicine is transforming your health care”
THIS RESOURCE AIMS TO PROVIDE YOU POSSIBLE QUESTIONS FORWBI15 OCT/NOV EXAMINATION 2020, PRE-RELEASED ARTICLE 2020 FOR A2 BIOLOGY EDEXCEL IAL NEW SPECIFICATION.
*NOTE: (PRE-RELEASED ARTICLE OF JUNE 2020 WOULD BE USED FOR OCT/NOV EXAMINATION 2020 )
This resource is specifically designed for A2 EDEXCEL BiologyStudents to tackle concepts of infection, how the theory of an ‘evolutionary race’ between pathogens and their host is supported by evasion mechanisms shown by pathogens. It also highlights different modes of action of bacteriostatic and bactericidal antibiotics also you will understand spread of antibiotic resistance and super bugs.
This resource covers explanation about types of white blood cells, infection, pathogens, inflammation, fever and role of interferons. In addition to that specific responses of immune system i.e, Humoral response and Cell-mediated response. Structure and types of antibodies. Also types of immunity.
This resource has been developed for A2 Biology students to understand stages after death including Palor Mortis (paleness after death), Algor Mortis change in body temperature post mortem, until the ambient temperature is matched and degree of muscle contraction i.e, Rigor Mortis, discoloration of skin and decomposition. It also includes stage of succession, forensic entomology and practice questions.
Note: This resource contains graphical pictures which may be disturbing for some individuals.
THIS RESOURCE AIMS TO PROVIDE YOU POSSIBLE QUESTIONS FOR OCT/NOV EXAMINATION 2020, PRE-RELEASED ARTICLE 2020 FOR A2 BIOLOGY EDEXCEL IAL WBI05) OLD SPECIFICATION.
*NOTE: (PRE-RELEASED ARTICLE OF JUNE 2020 WOULD BE USED FOR OCT/NOV EXAMINATION 2020 )
This powerpoint presentation highlights growth of bacteria, culture technique, factors affecting bacterial population in vitro and methods to count bacterial/ fungal population or cells.
I have developed this resource to understand that classification is a means of organising the variety of life based on relationships between organisms using differences and similarities in morphology,biochemicals and in genotypes. This also explains Carl woese’s approach of Molecular Phylogeny, leading to new taxonomic groupings, based on molecular evidence, including the three-domain system (Archaea, Bacteria and Eukarya).
This resource focuses on following topics:
how urea is produced in the liver from excess amino acids with simple version of the ornithine cycle and how it is removed from the bloodstream by ultrafiltration.
how solutes are selectively reabsorbed in the proximal tubule and how the loop of Henle acts as a countercurrent multiplier to increase the reabsorption of water
how the pituitary gland and osmoreceptors in the hypothalamus, combined with the action of antidiuretic hormone (ADH), bring about negative feedback control of mammalian plasma concentration and blood volume and regulates urine concentration.
**This comprehensive resource includes following topics:
The structure of a mammalian skeletal muscle fibre.
The process of contraction of skeletal muscle in terms of the sliding filament theory.
The role of actin, myosin, troponin, tropomyosin, calcium ions (Ca2+), ATP and ATPase
The structural and physiological differences between fast and slow twitch muscle fibres.
The structure of Synovial joint.
*This worksheet helps to revise and learn all important structures and components related to skeletal muscle i.e a knee joint, structure of a muscle fiber, types of skeletal muscle fibers, the sarcomere and sliding fiament theory. *
This resource is specially designed for O level students to understand adaptations in animal cells and plant cells. It also explains how organisms are designed i.e, level of organization. At the end quiz questions are given along with mark scheme.
This resource includes the basic structure of mononucleotides (deoxyribose linked to a phosphate and a base, including thymine, adenine, cytosine or guanine) and the structures of DNA (polynucleotide composed of mononucleotides linked by condensation reactions to form phosphodiester bonds) This resource also explains how complementary base pairing and the hydrogen bonding between two complementary strands are involved in the formation of the DNA double strand and help you to understand the process of DNA replication, and how Meselson and Stahl’s classic experiment provided new data that supported the accepted theory of replication of DNA.
Understand the uses of genetic screening, pre-implantation genetic diagnosis (PGD) and the implications of prenatal genetic screening. Also identify the ethical and social issues relating to genetic screening
PERFECT FOR A LEVEL STUDENTS TO REVISE AND UNDERSTAND CONCEPTS OF NATURAL SELECTION, GENETIC VARIATION IN POPULATION , EVOLUTION AND SPECIATION. IT ALSO EXPLAINS TYPES OF SPECIATION LIKE ALLOPATRIC SPECIATION AND SYMPATRIC SPECIATION. IT ALSO HIGHLIGHTS TYPES OF ISOLATING MECHANISMS WHICH LEAD TO REPRODUCTIVE ISOLATION OF POPULATION. I HAVE ALSO INCLUDED SAMPLE OF PAST PAPER QUESTIONS RELATED TO THIS TOPIC ALONG WITH MARK SCHEME.
