4. In the graph shown below, the dashed line shows the level of MRNA for a certain protein, Prot6, at various positions along the anterior-posterior axis of an insect embryo. The solid lines portray the levels o two regulatory proteins, A and B that control translation of the Prot6 mRNA. A B Position Biology: How Life Works, Second Edition © 2016 W.H. Freeman and Company If both A and B stimulate translation of the Prot6 mRNA, then which graph, from the ones shown below, best approximates the expected level of Prot6 across the embryo? Briefly justify your answer. M H K Position Position Position Position Position Protein level MRNA level

4. In the graph shown below, the dashed line shows the level of MRNA for a certain protein, Prot6, at various positions along the anterior-posterior axis of an insect embryo. The solid lines portray the levels o two regulatory proteins, A and B that control translation of the Prot6 mRNA. A B Position Biology: How Life Works, Second Edition © 2016 W.H. Freeman and Company If both A and B stimulate translation of the Prot6 mRNA, then which graph, from the ones shown below, best approximates the expected level of Prot6 across the embryo? Briefly justify your answer. M H K Position Position Position Position Position Protein level MRNA level

Name: 4. In the graph shown below, the dashed line shows the level of MRNA
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Description: 4. In the graph shown below, the dashed line shows the level of MRNA for a certain protein, Prot6, atvarious positions along the anterior-posterior axis of an insect embryo. The solid lines portray the levels otwo regulatory proteins, A and B that c

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter16: Gene Expression

Section: Chapter Questions

Problem 4RQ: Control of gene expression in eukaryotic cells occurs at which level(s)? only the transcriptional...

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5. While exploring the human genome, a geneticist happens upon a gene in humans that is not functional and is not currently being expressed. This gene appears to be similar to the genes found in modern monkeys that cause tail formation. The most likely explanation for this gene in humans is Group of answer choices a. The gene is lying in wait for when it will be needed and then activated when the opportunity arises b. The gene is a conserved gene that serves an essential function in modern humans c. Humans are likely evolving a tail, and the gene will be expressed in the future d. The gene Is a random mutation of no significance e. The gene is a pseudogene leftover from when human ancestors had a tail
How does the regulation of gene expression support continued evolution of more complex organisms? Cells can become specialized within a multicellular organism Organisms can conserve energy and resources Cells grow larger to accommodate protein production Both A and B.
To determine the effect of the bicoid gene, scientists injected bicoid mRNA into the posterior end of freshly laid fruit fly eggs. What effect would you expect such an injection to have on the flies development?
8) What makes a liver cell a liver cell and not a brain cell? A) The fact that it is found in an organ known as the liver B) The cells next to the liver cell dictate its identity C) The specific genes that the liver cell contains D) The specific genes that the liver cell expresses 7) The membranes of mictochondria, chloroplasts, and bacteria do all of the following except A) Pump ions against concentration gradients B) Generate ATP C) Generate chemical gradients D) Catalyze the reaction of the krebs cycle
1. A neuron and a white cell have very different functions. For example, a neuron can receive and respond to electrical signals while a white cell defends the body because it ___________.to. the proteins in neurons are completely different from those in the white cell.b. neurons and white cells in an individual have the same genome.c. the neuron expresses some mRNAs that the white cell does not express.d. Both neurons and white cells are already differentiated cells that do not need to transcribe or translate genes. 2. Which of the following is the main reason for a typical eukaryotic gene to be able to respond to a greater variety of regulatory signals than a typical prokaryotic gene or operon?to. eukaryotes have three types of RNA polymeraseb. RNA polymerases in eukaryotes require general and unspecific transcription factorsc. the transcription of a gened. prokaryotic genes are packed in nucleosomes 3. The distinctive characteristics of different types of cells in a multicellular…
2. "Build" the mRNA molecule matching the RNA nucleotides to the DNA nucleotides properly, letter by letter.
1. Bradykinin peptide: a) The sequence of the gene that encoded it, indicating with different colors, the direction, its components and the part of the cell where it occurs with the name of this stage. b) The sequence of the mature mRNA, indicating with different colors the structure of its components and the site of the cell with the name of the stage where it occurs. c) Mention the site of the cell where the bradykinin peptide was synthesized. d) In the DNA sequence make a point mutation by substitution, indicate with a different color the site and the effect it will have on the respective codon and to which amino acid it will be translated. 2. Based on the answer in (a), use the DNA sequence of bradykinin to describe the outcome of the replication step. 5. You have the picture of DNA transcription and mRNA translation between prokaryotic and eukaryotic cells.Instruction: Make a comparative chart showing the differences between the two cells. (image) 7. Methylations. Describe…
1. Identify the name of the correct amino acid that corresponds to the correct tRNA codon and mRNA codon. State the process used to convert to mRNA and tRNA.
1) Below are some events that occur in the process of translating mRNA into a protein in a bacterial cell. Pick the best order of events. EF-G–GTP binds to the tRNA in the A site and causes the tRNA to advance to the P site.- The rRNA in the ribosomal 30S subunit base-pairs with the Shine-Dalgarno sequence in the mRNA.- Peptide bond forms between the growing amino acid chain in the P site and the new amino acid in the A site.- IF-3 binds in the E site.- RRF binds in the A site.- RF-1 or -2 binds in the A site.- Ribosomal complex dissociates.- Peptide chain dissociates from final tRNA.- fMET tRNA binds to the start codon in the mRNA.- RF-3–GTP causes displacement of RF-1 or -2 and its exit from the ribosome.- EF-G–GTP binds to the A site and causes RRF to shift to the P site.- A conformational change in the 30S subunit allows the 50S subunit to bind, forming the 70S ribosome. Step 1, 2, 3, 4 ,5 ,6 , 7, 8, 9, 10, 11, 12
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7. Although DNA gets all the glory, it’s actually RNA that does most of the work when cells produce proteins. Explain how RNA is involved in gene expression (i.e., in transcription and translation).