7 combustion rex C12H22O11+12O212CO2+11H2O photosynthesis rex 11 H2O + 12 CO2 =

Question

7 combustion rex C12H22O11+12O212CO2+11H2O

photosynthesis rex 11 H2O + 12 CO2 = C12H22O11 + 12 O2

in combustion sucrose gives water and carbondioxide and in phothosynthesis water and co2 gives sucrose

8 Monosaccharides are the sugars that cannot be hydrolysed to give a simpler sugar.(e.g. glucose)

Disaccharide are the sugars whose molecules contain two monosaccharide residues.(e.g.sucrose)

Polysaccharide are the  carbohydrate whose molecules consist of a number of sugar molecules bonded together. (e.g. starch, cellulose, or glycogen)

9 Amino acids that are required for normal health and growth, are either not manufactured in the body or manufactured in insufficient quantities, are usually supplied by dietary protein, and in humans include histidine, isoleucine, leucine, lysine, methionine, phenylalanine.

Explanation / Answer

7. Two processes are vital for life on our planet, photosynthesis and combustion. One process is used to store up energy and the other to provide energy where it's needed. Write the chemieal equations for combustion and photosynthesis with the carbohydrate sucrose, CHOn Explain how the photosynthesis reaction is related to the combustion reaction. 8. Define monosaccharides, disaccharides, and polysaccharides. Inelude a discussion of the molecular structures and give one example of each type of molecule. 9. What is meant by "essential amino acids"? Why are they called "essential"? How many are there? 10. The molecules tristearin and trilinolenin are shown below. a. To what class of molecules do these two molecules belong? b. Are these molecules solid or liquid at room temperature? Explain in terms of the molecular structures. c. Are these molecules water-soluble? Explain in terms of the molecular structures. 11. Polymers are all around us. We have incorporated them into every single aspect of our society. a. Name the monomer molecules used to create the following polymers: 1 - polyethylene 2 polystyrene 3 - polypropylene b. Discuss the benefits and issues of the widespread use of polymers in our society. 12. Understanding that fossil fuels are creating environmental problems, we are developing other sources of fuel. a. Give five examples of alternative energy sources. b. One partieular class of alternative energy sources are the renewable fuels. What does it mean for an energy source to be renewable? Give three examples. e. What are some of the issues that eause people to be skeptical about the use of certain types of alternative energy sources? 13. Deoxyribonucleic acids (DNA) are a critical class of large molecules in living systems a. What is DNA made of? b. What function does DNA serve in the human body? c. If a certain strand of DNA has the sequence CTTGAGTCAGTA, what is the complementary sequence?

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