Genetics: From Genes to Genomes
6th Edition
ISBN: 9781259700903
Author: Leland Hartwell Dr., Michael L. Goldberg Professor Dr., Janice Fischer, Leroy Hood Dr.
Publisher: McGraw-Hill Education
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Chapter 1, Problem 5P
| a. | How many different DNA strands composed of 100 |
| b. | How many different proteins composed of 100 amino acids could possibly exist? |
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Chapter 1 Solutions
Genetics: From Genes to Genomes
Ch. 1 - Choose the phrase from the right column that best...Ch. 1 - If one strand of a DNA molecule has the base...Ch. 1 - The size of one copy of the human genome is...Ch. 1 - Indicate whether each of the following words or...Ch. 1 - a. How many different DNA strands composed of 100...Ch. 1 - RNA shares with proteins the ability to fold into...Ch. 1 - The human protein lactate dehydrogenase shown in...Ch. 1 - a. Are the triplets in the genetic code table...Ch. 1 - Why do scientists think that all forms of life on...Ch. 1 - Why would a geneticist study a yeast cell or a...
Ch. 1 - How can a scientist tell if a protein present in...Ch. 1 - Figure 1.6 shows the amino acid sequences of parts...Ch. 1 - Why do scientists think that new genes arise by...Ch. 1 - Explain how the exon/intron structure of genes...Ch. 1 - Mutations in genes that change their pattern of...Ch. 1 - A single zebrafish gene function was inactivated...Ch. 1 - Different mutations in the WDR62 gene that...Ch. 1 - Researchers have successfully used gene therapy to...Ch. 1 - By the time this book is published, it will likely...
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- A. Give five important features of the DNA molecule? B. How does the DNA structure reflect its functions?arrow_forwardHow many different DNA strands composed of 100 nucleotides could possibly exist?arrow_forwardA. Draw a detailed structure of DNA strand using the following sequence of bases 5'A -C- G 3' Show the structure of the phosphate group, pentose sugar and nitrogen containing base B. Why is DNA called the blueprint of an organism?arrow_forward
- DNA structure depends on base pairing of its four nucleotides, A, C, T, and G. Nucleotide A pairs with T, and nucleotide C pairs with G. This forms a four-letter DNA “alphabet." Because DNA codes for amino acids in sets of three nucleotides, there are 4 cubed (4'), or 64, possible combinations, coding for 20 different amino acids. What is the best explanation for why there is no selective advantage for DNA to have five nucleotides (e.g., A, C, T, G, and E) with C pairing with either G or functionally equivalent E? It would be impossible to form the DNA molecule, because it must have an equal number of Cs and Gs. Because G and E have the same role, there would still be four functional letters of the alphabet. Replication would be inaccurate because sometimes C would bond with G and sometimes C would bond with E. There would be a five-letter alphabet with 125 combinations, which is too numerous. It is impossible because there are not five known nucleotides in the cell.arrow_forwardIllustrate some steps involved in DNA replication :Suppose the following base sequence was found in a segment of one strand of a DNA molecule: 3’ A-A-T-A-C-C-T-C-C-T-A-A-C-T 5’ What would be the bases in the complementary strand? Label the 3’ and the 5’ ends. Illustrate the DNA molecule below. Label the 3’ and the 5’ ends of both strands. Separate the above DNA molecule up to the seventh base. Add one primer for the leading strand complementary to the first base Adenine of the template strand. Add one primer for the lagging strand complementary to the seventh base Adenine of the template strand. Illustrate the DNA molecule. Label the 3’ and 5’ ends. Elongate the new strands up the seventh base by adding DNA bases complementary to the template strand. Illustrate the resulting DNA molecule. Label the 3’ and the 5’ ends of the template strands and the complementary strands. Elongate the new strands up the seventh base by adding DNA bases complementary to the template strand. Illustrate…arrow_forwardIf a DNA double helix contains 28% T nucleotides, then what is the percentage of A nucleotides?arrow_forward
- Select TRUE or FALSE for each of the following statements: 1. Only one of the three phosphate groups present in each nucleotide precursor remains present in a DNA polymer. 2. Starch and cellulose are alike in that both contain sugars bonded together in identical ways. 3. The coding strand of DNA is complementary in sequence to the corresponding MRNA. 4. Ribosomal RNA (rRNA) is synthesised by ribosomes in the process of translation. 5. Polyribosomes speed up the rate of transcription.arrow_forwardConsider the structure and function of DNA. Which of the following statements is TRUE? Because DNA contains carbohydrates, it provides structural support to the cells. The phosphodiester bonds that stabilize the association of the two strands are easily broken and reformed. If the sequence of one DNA strand is known, then the sequence of the other strand can be determined. Because DNA is made of phosphate groups that are ionized, it could easily pass through a cell membrane.arrow_forwardQ1: Name two base pairs. Q2: Why is the DNA structure referred to as a “ladder”? What part of the DNA represents the rungs of the ladder? What part represents the sides? Q3: Is the hydrogen bond that holds the base pairs together a strong or weak chemical bond?arrow_forward
- Describe in detail the structure of DNA. Of what is a nucleotide composed? Which are thepurines and pyrimidines? What are the bonding rules? What kind of bond holds the two DNAstrands together?arrow_forwardType the matching bases in each DNA sequence. G A T A G C T A G Garrow_forward. Which of the following equations is a prediction based on Chargaff’s rules for the content of DNA? adenine + thymine = guanine + cytosine thymine + adenine = cytosine + guanine guanine + cytosine = adenine + thymine cytosine + guanine = thymine + adenine adenine + cytosine = thymine + guaninearrow_forward
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