LaunchPad for Biology: How Life Works (Six-Months Online)
3rd Edition
ISBN: 9781319305727
Author: Morris, JAMES
Publisher: Macmillan Higher Education
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Chapter 13.2, Problem 6SAQ
Summary Introduction
Nucleotides are building blocks of deoxyribonucleic acid (DNA) or ribonucleic acid (RNA). The
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Does a sequence contain a gene?
What is the relation of the sequence of the template strand of DNA to the nucleotide sequence of the mRNA?
In what ways does the double helix explain the essential properties of a gene?
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LaunchPad for Biology: How Life Works (Six-Months Online)
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- An RNA molecule has the following percentages of bases: A = 27%, U = 38%, C=20%, G = 15%. (A) Is this RNA molecule single-stranded or double stranded? How can you tell? (B) What would be the percentage of each of the bases in the template strand of the DNA that contains the gene for this RNA?arrow_forwardWhat is the relationship between the structure and function of proteins and how are they are encoded by the genetic code?arrow_forwardWhat Is the Nature of Amino Acid Sequences?arrow_forward
- How is a protein with a proper sequence generated?arrow_forward(a) Write the complementary base sequence for the matching strand in the DNA section shown below:. 5’ – A T G T T A C T A G T C – 3’ (b) The following section of DNA is used to build an mRNA for a protein: 3′—AAG—CTT—CTC—5′. What is the corresponding mRNA sequence?arrow_forwardIdentify which regions of DNA encode the protein sequence. Consider that there may be introns (which often start with sequence GU and end with the sequence AG).arrow_forward
- If the gene undergoing protein synthesis consists of 24 bases, how many codons does that result in? How many amino acids will the protein consist of?arrow_forwardThe amino acid sequence for a short peptide is Tyr-Leu-Thr-Ala. What are the possible base sequences of the mRNA and the transcribed DNA strand that code for it? What are the anticodons?arrow_forwardCystic fibrosis (CF) is an inherited disorder caused by different types of mutations, many of which prevent ions from moving across cell membranes. Normally there are channel proteins that allow passage of the ions, but in patients with one kind of CF these proteins seem odd. Closer examination shows that these proteins display the correct amino acid sequence. However, they fail to do their job. A) Given that the primary structure of the protein is correct, what can you infer about the DNA sequence for the gene coding this protein on this patient, is there a mutation? Explain. B) Why is the primary structure insufficient to guarantee the proper function of the protein?arrow_forward
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