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Decomposition of Water
Purpose
The purpose of this experiment is to decompose water-using electrolysis.
Procedure
Custom Essays on decomposition of water
Connect the wires from the electrolytic cell to the power supply. Pour 150mL of water into each beaker. Place the electrodes in the bottom of the beaker. Be sure to have the negative on the left for future reference. Turn power on to 10- 15 volts. Pour in the electrolyte and observe.
Data
Trial I
(10mL catalyst)
Trial II
(0mL catalyst)
Volume H
(cm)
Volume O
(cm)
Volume ratio
HO
Mass H (g)
Mass O (g)
Mass ratio
HO
Mass ratio
OH
Calculations
To get the mass of the gases, multiply their volume by the density. To get the ratio of the gases, divide the amount of the gas to the second. The answer must be a quotient.
DNA AND RNA
1) In replication the complementary base pairing is used when the DNA double helix unzips and the two strands separate. They act as templates and direct the synthesis of a new complementary strand which is possible because of the rule of complementary base pairing. Transcription is the process of synthesizing the mRNA from DNA. Complementary base pairing is used to form the mRNA and also to transcribe the message of the DNA to the mRNA. Translation is the process of making proteins, which takes place on the ribosome. The tRNA translates the message from the DNA by forming complementary base pairs with the mRNA.
) DNA is the substance that stores and transmits genetic information, which is the fundamental condition of life.
Chromosomes are linear strands of DNA and associated proteins that carries the genes that determine heredity.
A gene is a section of DNA, which codes for a particular protein.
) DNA is a polymer or better said is a polynucleotide, which means that is, made of a certain number of necleotides. Nucleotides have three parts phospate, five-carbon sugar, and nitrogenous base. These there parts are all held together by covalent bonds. Between the complementary base pairs, the double helix is held together by weak hydrogen bonds.
4) DNA replication occurs during interphase in preparation for mitosis. During mitosis, a cell makes another cell by making a copy of itself. That is why DNA replicates itself too and it does in a stage called the "S" phase of the cell. DNA replication starts with the action of enzymes who help the double helix unsip by seperating the paired bases at the weak hydrogen bonds. Now in the cell, there are two strands of DNA that start acting as templates or guides. Each of these directs the synthesis of a new complementary strand along its length and it uses the raw material in the cell.
DNA RNA
5) - it has deoxyribose sugar - it has ribose sugar
- the bases (T, A, C, G) - the bases (U, A, C, G)
- its shape is a double helix- its shape is a single helix
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