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Biology OYO

Module 7

QuestionAnswer
7.1 Two identical twins have the same set of genes. They are separated at birth and grow up in different households. If a scientist were to study the twins as adults, would he find them to be identical in every way, since they have the same genes. Possibly.
7.1(continued) Why or why not? Because the twins are in different environments and, as a result, could be affected in two different ways.
7.2 An RNA strand has the following sequences of nucleotides: uracil, adenine, adenine, guanine, cytosine, cytosine. What was the nucleotide sequence in the DNA that it transcribed? Adenine, thymine, thymine, cytosine, guanine, guanine.
7.3 A DNA strand has the following sequence of nucleotides: thymine, thymine, thymine, adenine, guanine, cytosine. What will the RNA sequence be when this DNA section is transcribed? Adenine, adenine, adenine, uracil, cytosine, guanine.
7.4 A scientist is studying a nucleic acid, but her notes are sketchy. You do not know whether she is studying DNA or RNA. You can make out the following nucleotide sequence, however: guanine, cytosine, cytosine, uracil, guanine, adenine
7.4 (continued) Is the scientist studying DNA or RNA? RNA.
7.5 A protein has alanine as its first amino acid. One codon that calls for alanine has the following sequence of nucleotide bases: guanine, cytosine, adenine
7.5a. If a protion of DNA instructs a cell to make this protein, what will be the first three nucleotide bases of that DNA portion? Cytosine, guanine, thymine.
7.5b. What will be the sequence of nucleotide bases on the tRNA that responds to the mRNA codon given above? Cytosine, guanine, uracil.
7.6 The phases of a cell's life are listed below. Which one is not a part of mitosis? Take the remaining phases and order them according to when they occur in the mitosis process. anaphase, prophase, interphase, telophase, metaphase Interphase. Prophase, metaphase, anaphase, and telophase.
7.7 A cell uses vesicles to build the plasma membrane during the telophase of mitosis. Is it a plant cell or an animal cell? Plant cell.
7.8 In which phase of mitosis are the chromosomes separated from their duplicates? Anaphase.
7.9 A pea plant has 7 pairs of homologous chromosomes. What is its haploid number? What is its diploid number? Seven. Fourteen.
7.10 In a scientist's notebook, you find notes regarding a new species that is being studied. The notes say that the species is diploid, with a chromosome number of 17. Is this the haploid or diploid number? Haploid.
7.10 (continued) If this is the haploid number, give the diploid number. If this is the diploid number, give the corresponding haploid number. Thirty-four.
7.11 Which phases of meiosis are essentially the same as the corresponding phases of mitosis? Which are different? Prophase II, anaphase II, metaphase II, and telophase II. Anaphase I, telophase I, and metaphase I.
7.12 A cellular reproduction process results in four diploid cells. Is this mitosis or meiosis? How many cells underwent this process? Mitosis. Two.
7.13 A cellular reproduction process results in four haploid cells. Is this mitosis or meiosis? How many cells underwent this process? Meiosis. One.
7.14 A sperm cell finds a polar body and attempts to fuse with it. Will a viable zygote develop? No.
7.15 What is the principal difference between viruses and pathogenic bacteria? Viruses aren't alive, but pathogenic bacteria is.
7.16 The human body can produce the antibodies that destroy smallpox. If this is the case, why did so many people die from it? Why didn't their bodies just kill the virus? Because their bodies could not figure out what type of antibody to make before it was too late. Their bodies didn't have the right type of antibody.
Created by: LiseBrinkley
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