B) During aerobic respiration (respiration that uses oxygen) chemical reactions occur that: use glucose (a sugar) and oxygen release energy.
Copyright The Student Room 2017 all rights reserved.I) Muscles store glucose as biology glycogen, which can then revision be converted back to glucose for use during exercise.Yeast cells level have a nucleus, revision cytoplasm and a membrane surrounded by a cell wall. If you think you'll panic more doing this, then don't, but it can be helpful to keep the biology titles in the back of your mind as some of the questions in the bulk of the paper may have information useful to the essay itself.Suggested ideas level for practical work to develop skills and understanding include the following: observation of cells under a microscope, eg sprouting mung beans to show root hair cells computer simulations revision to model the relative size of different cells, organelles and molecules computer simulations to model.D) The enzyme amylase is produced in the salivary glands, the pancreas and the small intestine.In mature animals, cell division is mainly restricted to repair and replacement.Proteins act as: structural components of tissues such as muscles hormones antibodies catalysts.Notes: Past Papers: Questions by Topic: Set 1, set. These enzymes catalyse the game breakdown of lipids (fats and editor oils) into fatty acids and glycerol in the small intestine.
The fossil record otak shows that new organisms arise, flourish, and after a time become extinct.
M) Treatment with stem cells may revision be able to help conditions such as paralysis.
Each gene may have different forms called revision alleles.
B) Examples of plant tissues include: epidermal tissues, which cover the plant mesophyll, which carries out photosynthesis xylem and phloem, which transport substances around the plant.A new individual then develops by this cell repeatedly dividing by mitosis.B a tissue is a group of cells with similar structure and function.Examples of tissues include: muscular tissue, game which can contract to bring about movement glandular tissue, which can produce substances such as enzymes and hormones epithelial tissue, which covers some parts of the body.B2.7.2 Genetic variation a) Sexual reproduction gives rise to variation because, when gametes fuse, one of each pair of alleles comes from each parent.Candidates biology should understand: the terms mean, median and mode that sample size is related to both validity and reproducibility.Bile neutralises the acid that was added to food in the stomach.E) Protease enzymes are produced asah by the stomach, the pancreas and the small intestine.E) An allele that controls the development of characteristics only if the dominant allele is not present is a recessive allele.