BIOLOGY
4th Edition
ISBN: 9781266739606
Author: Hoefnagels
Publisher: MCG
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Chapter 7, Problem 11WIO
The amount of melanin in the skin is controlled by genes, yet melanin is not a protein. How can this be?
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Chapter 7 Solutions
BIOLOGY
Ch. 7.1 - How did Griffiths research, coupled with the work...Ch. 7.1 - How did the Hershey-Chase blender experiments...Ch. 7.2 - What are the components of DNA and its...Ch. 7.2 - What evidence enabled Watson and Crick to decipher...Ch. 7.2 - Prob. 3MCCh. 7.3 - What is the relationship between a gene and a...Ch. 7.3 - Prob. 2MCCh. 7.3 - What are the three types of RNA, and how does each...Ch. 7.4 - What happens during each stage of transcription?Ch. 7.4 - Where in the cell does transcription occur?
Ch. 7.4 - What is the role of RNA polymerase in...Ch. 7.4 - What are the roles of the promoter and terminator...Ch. 7.4 - How is mRNA modified before it leaves the nucleus...Ch. 7.5 - How did researchers determine that the genetic...Ch. 7.5 - What happens in each stage of translation?Ch. 7.5 - Where in the cell does translation occur?Ch. 7.5 - How are polypeptides modified after translation?Ch. 7.6 - What are some reasons that cells regulate gene...Ch. 7.6 - Prob. 2MCCh. 7.6 - Prob. 3MCCh. 7.6 - Prob. 4MCCh. 7.7 - What is a mutation?Ch. 7.7 - What are the types of mutations, and how does each...Ch. 7.7 - Prob. 3MCCh. 7.7 - Prob. 4MCCh. 7.7 - How are mutations important?Ch. 7.8 - What question about the FOXP2 gene were the...Ch. 7.8 - What insights could scientists gain by...Ch. 7 - A nucleotide is composed of all of the following...Ch. 7 - Prob. 2MCQCh. 7 - Transcription copies a _______ to a complementary...Ch. 7 - Choose the DNA sequence from which this mRNA...Ch. 7 - Prob. 5MCQCh. 7 - Prob. 6MCQCh. 7 - How does the lac operon regulate lactose digestion...Ch. 7 - Prob. 8MCQCh. 7 - Prob. 9MCQCh. 7 - Prob. 10MCQCh. 7 - Explain how Griffiths experiment and Avery,...Ch. 7 - Prob. 2WIOCh. 7 - Prob. 3WIOCh. 7 - Put the following in order from smallest to...Ch. 7 - Prob. 5WIOCh. 7 - List the three major types of RNA and their...Ch. 7 - Some people compare DNA to a blueprint stored in...Ch. 7 - Prob. 8WIOCh. 7 - Prob. 9WIOCh. 7 - If a protein is 1259 amino acids long, what is the...Ch. 7 - The amount of melanin in the skin is controlled by...Ch. 7 - The roundworm C. elegans has 556 cells when it...Ch. 7 - Refer to the figure to answer these questions: a....Ch. 7 - A protein-encoding region of a gene has the...Ch. 7 - Explain how a mutation in a protein-encoding gene,...Ch. 7 - Describe the mutation shown in figure 7.27 and...Ch. 7 - Parkinson disease causes rigidity, tremors, and...Ch. 7 - Prob. 18WIOCh. 7 - Refer to figure 7.28 and the chapter con tent to...Ch. 7 - Prob. 2PITCh. 7 - Prob. 3PITCh. 7 - Prob. 4PIT
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- A mutation leads to a change in one amino acid in a protein. The result is that the protein no longer functions properly. How is this possible?arrow_forwardIn many genetic disorders, a lysosomal enzyme required to degrade a specific molecule is missing or defective. One example of these maladies, often referred to as lysosomal storage diseases, is Tay-Sachs disease. Afflicted individuals inherit a defective gene from each parent that codes for an enzyme that degrades a complex lipid molecule. Symptoms include severe mental retardation and death before the age of 5 years. What is the nature of the process that is destroying the patient's cells? (Hint: Synthesis of the lipid molecule continues at a normal rate.)arrow_forwardThe protein known as tyrosinase is needed to make certain types of pigments. Tyrosinase is composed of a single polypeptide with 511amino acids. The molecular mass of this protein is approximately61,300 Da, or 61.3 kDa. People who carry two defective copies ofthe tyrosinase gene have the condition known as albinism. They areunable to make pigment in the skin, eyes, and hair. Western blottingis used to detect proteins that are translated from a particularmRNA. This method is described in Chapter 20 and also in experimentalquestion E4. Skin samples were collected from a pigmentedindividual (lane 1) and from three unrelated albino individuals(lanes 2, 3, and 4) and subjected to a Western blot analysis using anantibody that recognizes tyrosinase.arrow_forward
- Hemoglobin is a complex protein that contains four polypeptide chains. The normal hemoglobin found in adults—called adult hemoglobin— consists of two alpha and two beta polypeptide chains, which are encoded by different loci. Sickle-cell hemoglobin, which causes sicklecell anemia, arises from a mutation in the beta chain of adult hemoglobin. Adult hemoglobin and sickle-cell hemoglobin differ in a single amino acid: the sixth amino acid from one end in adult hemoglobin is glutamic acid, whereas sickle-cell hemoglobin has valine at this position. After consulting the genetic code provided in Figure 15.10, indicate the type and location of the mutation that gave rise tosickle-cell anemia.arrow_forwardWhich is NOT a true difference between messenger RNA and DNA? (i.e., which of the following statements is false?) DNA remains in the nucleus (except when the nuclear envelope breaks down during mitosis), whereas mRNA is never in the nucleus; it is always in the cytoplasm. A DNA molecule has a longer life span than a typical molecule of RNA. DNA has thousands of genes; mRNA is usually a copy of just one gene. DNA has thousands of genes; mRNA is usually a copy of just one gene.arrow_forwardA woman has an egg with a mutation for the gene that expresses whether the child can produce lactase enzymes. Here is the new nucleotide sequence with the change in bold. 3’ – ACCTCTTACTTCTATATATAGGGAAGACTAATTGTC – 5’ what type of mutation is this? Will this affect the child's abilty to produce lactase enzymes needed to digest lactose?arrow_forward
- Can I have help with number 2 and 3? 2) 2What is the specific function of the enzyme catalase? 3) Catalase is an enzyme found in aerobic cells. What does this mean?arrow_forwardHurler syndrome is due to a mutation in a gene that encodes aprotein called α-l-iduronidase. This protein functions withinlysosomes as an enzyme that breaks down mucopolysaccharides(a type of polysaccharide that has many acidic groups attached).When this enzyme is defective, excessive amounts of the mucopolysaccharides dermatan sulfate and heparin sulfate accumulatewithin the lysosomes, especially in liver cells and connectivetissue cells. This accumulation leads to symptoms such as anenlarged liver and spleen, bone abnormalities, corneal clouding,heart problems, and severe neurological problems. The pedigreebelow contains three members affected with Hurler syndrome,indicated with black symbols. Based on this pedigree, does thissyndrome appear to follow autosomal recessive, autosomaldominant, X-linked recessive, or X-linked dominant inheritance?Explain your reasoning.arrow_forwardAuthophagy refers to naturally regulated mechanisms of degradation and removal of dysfunctional proteins. Denaturation is the unfolding of proteins under the effects of physical factors. Now, is denaturation part of the process of authophagy?arrow_forward
- Determine the effect of the following mutations on the DNA sequence. In each case, the mutation is described after the sequence (REFER TO THE SUPPLEMENTAL DOCUMENT FOR GUIDANCE TO THIS QUESTION). Guanine nucleotide (G shown in red below) was deleted from the DNA sequence at the position indicated by the arrow). Write out the sequence of the mutated DNA and the protein made from it. What is the effect of this mutation on the protein? (For example, how will the mutation affect the length and sequence of the protein? What about the function of the protein?) 3' TACATGGTTGTGCTAATT 5'arrow_forwardDetermine the effect of the following mutations on the DNA sequence. In each case, the mutation is described after the sequence (REFER TO THE SUPPLEMENTAL DOCUMENT FOR GUIDANCE TO THIS QUESTION). Guanine nucleotide (G shown in red below) was deleted from the DNA sequence at the position indicated by the arrow). Write out the sequence of the mutated DNA and the protein made from it. What is the effect of this mutation on the protein? (For example, how will the mutation affect the length and sequence of the protein? What about the function of the protein?)arrow_forwardDetermine which statements could be used as evidence to support the argument that "DNA influences the proteins that are made" and which statements are just facts. [Select all that apply.] The HBB gene that makes beta-globin has several abnormal alleles, including HbS, HbC, and HbE. Sickle cell disease has been successfully treated using bone marrow transplantation in children and adults. The symptoms of sickle cell anemia may not appear in individuals who only carry one HbS allele, but are always apparent when both alleles are HbS. If oxygen is removed from red blood cells made by two HbS alleles, the cell will form a sickle shape.arrow_forward
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What are Mutations and what are the different types of Mutations?; Author: Science ABC;https://www.youtube.com/watch?v=I16YlE8qTBU;License: Standard youtube license