Imagine you took a protein coding sequence of DNA (a gene) from a pig, and added that sequence of DNA to a fruit fly. What would the resulting protein be like? The gene could be expressed, but it would be the fly version of the same gene The protein would be identical to the pig version of the protein The protein would be a mutated version of the pig protein No protein could be produced because of the difference in species

Imagine you took a protein coding sequence of DNA (a gene) from a pig, and added that sequence of DNA to a fruit fly. What would the resulting protein be like? The gene could be expressed, but it would be the fly version of the same gene The protein would be identical to the pig version of the protein The protein would be a mutated version of the pig protein No protein could be produced because of the difference in species

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter9: Molecular Biology

Section: Chapter Questions

Problem 6RQ: A promoter is ______. a. a specific sequence of DNA nucleotides b. a specific sequence of RNA...

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The diagram shown represents the coding strand of the myosin gene. Mutations in myosin can lead to muscle defects during development. Using what you know about how mutations can affect transcriptional and post-transcriptional regulation, match the results shown on the Northern (mature mRNA) to the mutations shown. The N lane shows the size and amount expected for non-mutated myosin mRNA. All samples were loaded at the top (-) side of the gel. Part 1. Which lane or lanes on the gel could be the result of mutation A? --4 ТАТАА AUG UAA Only known regulatory region TSS Mutation B: Mutation C. A: 5-base 20 nucleotides 3 nucleotides deletion deleted changed N 1 2 3 4 5
The diagram shown represents the coding strand of the myosin gene. Mutations in myosin can lead to muscle defects during development. Using what you know about how mutations can affect transcriptional and post-transcriptional regulation, match the results shown on the Northern (mature mRNA) to the mutations shown. The N lane shows the size and amount expected for non-mutated myosin mRNA. All samples were loaded at the top (-) side of the gel. Part 1. Which lane or lanes on the gel could be the result of mutation A? 00000 I lane 1 lane 2 lane 3 lane 4 lane 5 TATAA Mutation A. Deletion of indicated 2 nucleotides AUG TSS Mutation B. Deletion of 150 nucleotides N 1 2 3 4 5 UAA Mutation C. 3 nucleotides changed
The diagram shown represents the coding strand of the myosin gene. Mutations in myosin can lead to muscle defects during development. Using what you know about how mutations can affect transcriptional and post-transcriptional regulation, match the results shown on the Northern (mature mRNA) to the mutations shown. The N lane shows the size and amount expected for non-mutated myosin mRNA. All samples were loaded at the top (-) side of the gel. Part 1. Which lane or lanes on the gel could be the result of mutation A? ТАТА AUG UAA Only known regulatory region TSS Mutation B: Mutation C. 3 nucleotides 20 nucleotides deleted A: 5-base deletion changed 1 2 4 5 lane 1 lane 2 lane 3 lane 4 lane 5 OOO0O
A promoter is ______. a. a specific sequence of DNA nucleotides b. a specific sequence of RNA nucleotides c. a protein that binds to DNA d. an enzyme that synthesizes RNA
Scientists can put spider genes into yeast. The yeast can decode the spider genes to make spider silk protein. Why is this so? Evaluate the models. MODEL 1 Spider DNA mRNA mRNA Spider Protein 3. The yeast used machinery from a spider to read the spider genetic code, so both organisms make a protein that is identical. 1. The yeast transcription machine cannot read the spider gene, so yeast uses a machine from a spider to make an mRNA copy. Transcription Machine 2. The yeast translation machine cannot read the mRNA, so yeast uses a machine from a spider to make the protein. ◄ Translation Machine MODEL 2 Spider DNA ▼ mRNA mRNA Spider Protein 3. Yeast and spiders use the same genetic code, so both organisms make a protein that is identical. 2. Explain why one model is correct and the other one isn't. 1. Which model correctly explains what happens inside the yeast cell? 1. The yeast transcription machine reads the spider gene and makes an mRNA copy. Transcription Machine 2. The yeast…
8) Which of the following best describes why it is possible for the bacteria to read the instructions in a human gene and produce a human protein as a result? Bacterial cells and human cells are identical and contain the same organelles Bacterial cells and human cells both use DNA to store their genetic information The genetic code is universal - the same codon codes for the same amino acid in all species The bacterial cell already contains a gene that is very similar to the human growth hormone gene
Some mutations or changes in the sequence of DNA, do not have any offect on the characteristics of the organism. Why Is this? The protein from this mutated sequence deactivated by the cell The mutated sequence still codes for the same amino acid The cell recognizes mutations and ignores them when expressing the gene The immune system repairs the mutated sequence during development
The diagram below shows a hybridization experiment between a eukaryotic MRNA and the template strand of its gene. Which of the following statements is FALSE? This gene contains four exons. The 5' end of the MRNA is on the left side. Hybridization of a prokaryotic MRNA and its DNA template strand will not show loops of unpaired DNA. The gene's introns are visible as unpaired DNA loops. None of the above
What is the most likely method by which a gene produces red eyes in fruit flies? the gene codes for an enzyme that changes a colorless chemical into a red chemical in the cells of the eye the gene codes for an enzyme that is red a mutation changes the coding sequence of the gene so that it codes for a red protein instead of a white protein the gene codes for a chemical that is red in color
The information in DNA is used by cells to produce proteins that perform various functions in cells. The process of gene expression involves the transcription of a mRNA molecule that is translated by ribosomes into a strand of amino acids.1. Use your DNA strand to construct a part of a messenger RNA molecule.DNA: A G T A C C G G G C A A A C T G C A T T G T GmRNA:2. find it by searching the internet for the "Genetic Code Chart" to determine the sequence of amino acids in your polypeptide chain. Remember to START translation at the start codon by adding a Methionine and STOP translating when you reach a stop codon.
You are working in the lab and have measured the size of mRNA that has been transcribed from a particular gene in your cell population. The length of the gene in the cells you are working, measured from the start to the stop sequence is 9000 nucleotides. When you measure the RNA, however, the size is only 3000 nucleotides. What do you think happened? O a. Three DNA base pairs code for one RNA nucleotide. b. mRNA does not contain exons. c. There must have been a deletion mutation in the DNA in these cells. Od. The poly-A tail is present in the DNA but not on the mRNA. Oe. RNA splicing occurred, so introns are removed in the mRNA.
You have been given the DNA sequence for a particular fragment of DNA. You then isolated the mRNA made from that DNA and amplified it by PCR. You then determined the sequence of the cDNA obtained from different cells. You notice a difference. In the sequence obtained from DNA sequencing you see that a codon is 5' CAG however on the cDNA sequence it is TAG. These results are confirmed by repeated DNA sequence analysis using DNA and cDNA from different cell cultures (same species and tissue samples). What can explain this? a. The mRNA must have been deaminated at the cytosine. b. The cDNA generated most likely had a technical mistake caused by poor fidelity of the Taq enzyme. c. The DNA must have been mutated in all the cells that were used to isolate mRNA since the cDNA should always match the genomic sequence. d. Any cDNA made through RT-PCR will have T's substitued for genomic C's that are methyulated.

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		The gene could be expressed, but it would be the fly version of the same gene
		The protein would be identical to the pig version of the protein
		The protein would be a mutated version of the pig protein
		No protein could be produced because of the difference in species