Question

1. What must occur for a double-helix strand of DNA

transcription into RNA? What enzymes or protein
2. What are two key differences between DNA and I
composition and location within the cell.
3. Why does DNA transcribe itself into RNA? What i
cell?
4. How might a mistake during transcription impact t
organism? What is the biological name for such a
5. Provide the corresponding RNA strand that would
segment of DNA: ATTCGCACT

Answer 1

DNA must be unzipped before transcription can occur. DNA is naturally double-stranded, so each individual strand must be exposed. A variety of molecules are involved but recall that DNA helicase is largely responsible for unzipping DNA. RNA Polymerase is the enzyme responsible for binding to DNA and beginning the transcription of RNA.

DNA contains the four nucleotides: adenine, guanine, cytosine, and thymine. RNA contains adenine, guanine, cytosine, and uracil instead of thymine. RNA also leaves the cell's nucleus after transcription, while DNA spends its entire life inside the nucleus.

DNA transcribes RNA to provide directions for gene expression. Each sequence of nucleotides is transcribed into RNA codes to produce a specific protein by the cell. The RNA leaves the nucleus and carries out those instructions into the cell.

A mistake during this process is a form of a mutation, which could change the protein created by the cell or give the wrong instructions. Mutations can also occur during DNA replication, which can be so serious that the new cell has a slightly different DNA code.

UAAGCGUGA

Step-by-step explanation:

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Answer 2

1) What must occur for a strand of double-helix DNA before it can transcribe itself into RNA is the DNA must unwind its double- helix near the gene that is going to be transcribed. This region that the DNA has opened up is called transcription bubble.

2) The two key differences between DNA and RNA is that DNA contains sugar deoxyribose, while RNA contains sugar ribose. The second key difference is DNA's nitrogen bases are adenine, cytosine, guanine and thymine ( A, C, G, T ) while in RNA instead of thymine there is the uracil base.

( A, C, G, U )

3) The reason DNA transcribes itself into RNA because that is the whole goal of the process called transcription where a strand of DNA is copied into a new molecule of mRNA ( messenger RNA ) to to construct a functional product such as a protein.

4) A error during the process of transcription can change how the organism's physical characteristics or also can impact the way how DNA codes the phenotype. The name that was given for this situation is called a Mutation.

5) DN: ATTCGCACT -----------> RNA: AUUCGCACU

( DNA: A, G, C, & T while RNA: A, G , C , & U )

( DNA: A = T, G = C) (RNA: A = U, G = C)