You should be able to describe the nature of enzyme molecules and relate their activity to temperature and pH changes. Appreciate that large molecules cannot pass through the membrane. You can compare results and discover the net photosynthesis time. A single-celled Gcse photosynthesis has a relatively large surface area to volume ratio.
Build a green house by using glass or plastic sheets. Here they react with hydrogen formed from the splitting of water in the photochemical stage and carbon dioxide from the atmosphere with the presence of enzymes to form the organic glucose molecules.
The electrons at the higher energy levels are transferred along chains of electron carrier molecules. Active transport allows mineral ions to be absorbed into plant root hairs from very dilute solutions in the soil.
The effectiveness of an exchange surface is increased by: Pathogens may be viruses, bacteria, protists or fungi. You do not want a sudsy soap; if you find you get suds, add more baking soda.
The malarial protist has a life cycle that includes the mosquito. Tobacco mosaic virus TMV is a widespread plant pathogen affecting many species of plants including tomatoes. Mimicry to trick animals into not eating them or not laying eggs on the leaves.
Know that the role of stomata and guard cells are to control gas exchange and water loss. Plants and algal cells also need nitrate ions absorbed from the soil or water to make the amino acids used to make proteins. The right ventricle pumps blood to the lungs where gas exchange takes place.
The overall equation for the light-independent reactions in green plants is : Other Gcse photosynthesis based on e. HT only Identification can be made by: Be able to explain how electron microscopy has increased understanding of subcellular structures. Health is the state of physical and mental wellbeing.
Some plants have evolved mechanisms to increase the CO2 concentration in the leaves under these conditions. Bacteria can be grown in a nutrient broth solution or as colonies on an agar gel plate.
You should have done the experiments to: You can use PowerShow. Revise the investigation into the effect of antiseptics or antibiotics on bacterial growth using agar plates and measuring zones of inhibition. However, the emergence of strains resistant to antibiotics is of great concern. Production of poisons to deter herbivores eg tobacco plants, foxgloves and deadly nightshade.
You should be able to relate the action of enzymes to metabolism. Here a rise in carbon dioxide levels has no affect on the rate of photosynthesis as the other factors such as light intensity become limiting.
The green part of the light spectrum is not absorbed but is reflected which is the reason that most plants have a green color. For example, in green plants, the action spectrum resembles the absorption spectrum for chlorophylls and carotenoids with absorption peaks in violet-blue and red light.
Be able to discuss the global use of vaccination in the prevention of disease.
Since the s a range of antibiotics have been developed which have proved successful against a number of lethal diseases caused by bacteria.
Be able to translate information between graph and numerical form, plot and draw appropriate graphs, selecting appropriate scales for axes and extract and interpret information from graphs, charts and tables.
New medical drugs have to be tested and trialled before being used to check that they are safe and effective. This product is also referred to as 3-phosphoglyceraldehyde PGAL or, more generically, as triose phosphate. Carbon dioxide is only 0. In coronary heart disease an example of cardiovascular disease layers of fatty material build up inside the coronary arteries, narrowing them.
It includes a suggested teaching route but each resource section is separate and teachers can to pick and choose which activities they want to use.
The surface of the leaf is coated with a water-resistant waxy cuticle that protects the leaf from excessive evaporation of water and decreases the absorption of ultraviolet or blue light to reduce heating.This quiz about photosynthesis was designed to uncover various misconceptions that students often have, starting with GCSE level misconceptions and moving onto undergraduate level misconceptions.
This survey was compiled with the kind assistance of Prof Howard Griffiths, Department of Plant Science. In plants, photosynthesis is used to convert light energy from sunlight into chemical energy (glucose).
Carbon dioxide, water, and light are used to make glucose and oxygen.
The reactions of photosynthesis can be categorized as light-dependent reactions and dark reactions. Chlorophyll is a key. GCSE Biology revision resources. Exam questions organised by topic and difficulty, specimen papers and mark schemes for the new AQA GCSE () Biology.
Visit palmolive2day.com for more fantastic resources. Maths Made Easy © Complete Tuition Ltd Photosynthesis requires energy in the form of light to drive the chemical reaction. Photosynthesis is an endothermic. reaction. ) Photosynthesis. Photosynthesis: is the process by which plants manufacture carbohydrates from raw materials using energy from light.
light energy is absorbed by chlorophyll – a green substance found in chloroplasts in green plant cells and algae.Download