Biology 113 Review sheet Chapter 2: * What is a compound and how is it different than an element? Compound is more than one element. An element cannot be broken down by chem. Rxns. * What are the 4 main elements of life? Why? C‚H‚O‚N they make up 96% of living matter and they are found in all of the major macromolecules * Be able to calculate the number of protons‚ neutrons and electrons given an element’s mass number or atomic number. If given this symbol - 4He – can you tell
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________. A) liver‚ gall bladder B) small intestine‚ liver C) stomach‚ small intestine D) gall bladder‚ liver E) small intestine‚ gall bladder Answer: A 7) In the small intestine‚ amino acids and monosaccharides are moved into the mucosal cells by the process of A) diffusion. B) facilitated diffusion. C) active transport. D) endocytosis. E) exocytosis. Answer: C 8) The pancreas aids in the chemical digestion of food by A) producing mucin that lubricates the small intestine. B)
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meiosis I and meiosis II. Both divisional sequences have sub-stages such as‚ prophase (I‚ II)‚ prometaphase (I‚ II)‚ metaphase (I‚ II)‚ anaphase (I‚ II)‚ and telophase (I‚ II) that is continued by cytokinesis (I‚ II)‚ which is not part of meiosis. The cell undergoes different changes and transformations before and during meiosis‚ such as replication and condensation of chromosomes‚ duplication of centrosome‚ disappearance of nuclear envelope and the nucleus itself and more. During the first stage of
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in science. As I progressed through school my love of science changed to biology of all forms‚ from a molecular level to ecosystems as a whole and this was a key factor in my decision to study biological science as it covered a broad spectrum of biology based topics. Studying for my MSci degree opened my eyes to many new areas of biology and found two areas of biology that interested me the most: microbiology and cell biology and during my final two years I have‚ through my module options and project
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which cells divide and create living creatures. Without meiosis we cannot have the process of mitosis‚ which is the process by which cells of tissue are created for living creatures. When meiosis occurs 4 daughter cells are created‚ while only 2 are created in mitosis. With the creation of 2 daughter cells the new cells will be similar to the parent cell‚ but will have differences‚ as there more parent cells involved. When mitosis occurs the daughter cells will be identical to the parent cell‚ since
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Introduction: Proteins are necklaces of amino acids – long chains molecules. Proteins are the basis of how biology get this done. As enzymes‚ they are the driving force behind all the biochemical reactions which make biology work. As structural elements‚ they are main constituents of our bones‚ muscles‚ hair‚ skin‚ and blood vessels. As antibodies‚ they recognize invading elements and allow the immune system to get rid of the unwanted invaders. For these reasons‚ scientists have sequenced the
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2.1 Cell Theory 2.1.1 Outline the cell theory The three main principles of the cell theory are: * All organisms are composed of one or more cells * Cells are the smallest units of life * All cells come from pre-existing cells New Concepts * Cells contain the blueprint for their own growth‚ development and behavior * Cells are the site of all the chemical reactions needed to sustain life * Cells (and multicellular organisms) show emergent properties – appears as complexity
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IB SL Biology Study Guide Unit 5 – Ecology Emma-Louise Wich Communities and Ecosystems 5.1.1 Define species‚ habitats‚ populations‚ community‚ ecosystems and ecology. Species: a group of organisms that can interbreed and produce fertile offspring. Habitat: the environment in which a species normally lives or the location of a living organism. Population: a group of organisms of the same species who live in the same area at the same time. Community: a group of populations living and
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This is a mixture of medicine and biology‚ which analyses the effects of a drug on a cell‚ tissue‚ organ or organism. A pathologist is what Sir Howard Florey did‚ in studying diseases‚ learning about it and diagnosing the disease. His best-known work dates from his collaboration with chain‚ which began in 1938
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DNA replication is a biological process that occurs in all living organisms and copies their DNA. DNA replication during mitosis is the basis for biological inheritance. The process of DNA replication starts when one double-stranded DNA molecule produces two identical copies of the molecule. Each strand of the original double-stranded DNA molecule serves as template for the production of the complementary strand‚ a process referred to as semiconservative replication. Cellular proofreading and error-checking
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