The questions were as follows:
How does a DNA molecule code for a protein. Describe the process completely. The process of creating a protein from the information given from DNA consists of two parts: A sequence of three bases code for one aminoacid. In mRNA this is called a codon. After mRNA leaves the nucleus it travels to ribosomes, a cell part where proteins are made.
In the other end of tRNA there is a site where the specific aminoacid is attached. Ribosomes have several sites. The P site holds the growing polypeptide chain, the A site holds the next aminoacid that comes, and the E site is the exit site where the polypeptide chain detaches.
A new tRNA with its amino acid comes in to the ribosome and bonds to the A site.
This process continues until the whole polypeptide is made. This is called a stop codon. This way the process stops and the newly made polypeptide chain leaves the ribosome. This happens during the S phase of cell cycle. This process is fast and this is called the leading strand.
This is a discontinoual process and this is the lagging strand. If a DNA molecule has the message: I will insert a DNA sequence herewhat would be the amino acids in the protein?
What would happen if the DNA message changed to I will insert a different sequence with a base change? Be specific in your answer.
How does DNA replication ensure accuracy. The proof reader enzymes check the new copy against the original strand to make sure the bonding rules are followed. Fully explain the try operon in bacteria.
Again it consists of a promoter, operator and functional genes: These 5 genes make enz which synthesize tryptophan, a necessary amino acid. This gene is always ON, the repressor is not active when formed, so will not bond onto the operator.
Describe an operon in prokaryotes. Explain the significance of each part of the operon. The way prokaryotes organize and regulate genes is by use of what is known as an operon. An operon has several regions to it: Then there are the sections of the DNA with the genes.
In prokaryotes all related genes are located together. Explain two ways that genes can be controlled in eukaryotes. Transcriptional control is the most common.
In this type of control you prevent transcription from occurring. In this type of control you prevent the process of translation. What is the Human Genome Project? What were its goals? The Human Genome Project started as an international scientific project to identify all human genes and their location in the chromosomes.
Its goal was to know the sequence of genes and to use this information to find cures for genetic diseases.Question: BUSINESS A-LEVEL - SECTION 1 SAMPLE (SHORT ANSWERS) 1. Distinguish between piece rate and commission payment methods  2.
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