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You have just isolated a new virus that causes a serious infection in the Yosemite toad, an endangered species. Upon analysis of the base composition of this virus, you determine that it is 26% G, 32% A, 24% T, and 18% C. What two major conclusions can you make from this information allow about the structure (i.e. type of nucleic acid and whether it is single- or double-stranded) of this viral genome?

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Patrina SchowalterLv2

5 Jul 2019

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Researchers discovered a new virus and characterized its genome by determining the base composition and the percentage of each base. You want to categorize the virus by its genetic material. Remember that viruses carry their genetic material as DNA or RNA. Given what you know about the structure of the nucleic acids, propose a way to distinguish if the genetic material of this new virus is RNA or DNA, and whether it is single-stranded or doublestranded

1. What recent research has indicated that studying Down Syndrome may hold a key to cancer growth and slowing tumor growth? In your answer be sure to mention the DSCR1 gene, angiogenesis suppression, and why individuals with Downâs Syndrome rarely have solid tumor growth. 2. Select your favorite chromosome and list the following: Three disorders that are found on this chromosome, Indicate the type of disorder (dominant, recessive) and the type of numerical or structural aberration. 3. Assume that crossing over does not occur in the region of each chromosome that is associated with the centromere. You have 46 centromeric regions in each cell, 23 that are copies of the DNA in your motherâs egg and 23 that are copies of the DNA fatherâs sperm. a. For any given gamete, what is the probability that all the centromeric regions will be copies of the same ones that you received from your mother? b. It has been estimated that the average person is heterozygous for at least 2,000 protein forming genes. How many different kinds of gametes is it theoretically possible for each person to produce? c. Considering the maternal and paternal origin of the centromeric regions alone, how many different kinds of gametes can you produce? 4. Find a current article on Telomerase (within the last year). Summarize the article and answer the following: What is telomerase? Why is it viewed as the fountain of youth? Attach the abstract or the first page. 5. Promiscuous Sun Flower has five lovers, but she has decided that the only true father of her child can have her hand in marriage. Sunâs Blood type is A- her five suitors blood types are as follows: a. Maury AB+ b. Elmer O+ c. Willie A- d. Jiggs B- e. Cousin it B+ 6. What is the epigenome. Explain why the study of the epigenome may not follow normal Mendelian genetics 7. Explain what is meant by the statement âWomen are just as hemizygous as menâ. 8. After having 10 children you remarryâ¦â¦ What is the probability of you now having a boy and then a girl, and then a girl, and then a boy, and then a boy or a girl, and then a girl? You now have 16 childrenâ¦â¦ 9. The genetic code has four codons for the amino acid Valine (GUG, GUC, GUU, GUA). Organisms have evolved to use some codes more than other codes. Which of the valine codes would you expect to be preferentially used in the genome of an algae growing in a hot spring at Yellowstone Park? EXPLAIN your answer 10. You discovered a new virus that needs to be studied. You begin by digesting the virus with protease (an enzyme that completely digests all proteins) until only amino acids remain. You then determine that the base composition of the viral nucleic acid is 38% Cytosine, 35% Glycine, 15% Thymine, and 12 % Adenine. To which class could this virus belong? EXPLAIN YOUR ANSWER a. Single-stranded RNA Virus b. Double-stranded RNA Virus c. Single-stranded DNA Virus d. Double=stranded DNA Virus e. None of the above because there is not enough information given to make a guess. 11. Adenine is found in numerous biological molecules (for example, DNA, RNA, NADH, ATP). You are now asked to explain the evolution of adenine and at least 5 of these biological (Adenine containing) molecules and how they may have evolved (the order).

amethysthippopotamus941

#1 You decide to identify the CFTR mutation by analyzing the genomic DNA of your patients compared to healthy individuals. You specifically are looking to see whether a specific 3' gene truncation has occurred in the patients. You will determine this using hybridization techniques with samples from healthy and CF patients. Which of the following will allow you to accomplish this?

A) Using an RNA probe complementary to the region not removed by the truncation

B) Using an RNA probe complementary to the region removed by the truncation.

C) Using an DNA probe complementary to the region not removed by the truncation.

D) Using an DNA probe complementary to the region removed by the truncation

E) Using an antibody complementary to the region not removed by the truncation.

F) Using an antibody complementary to the region removed by the truncation.

#2To conduct the hybridization experiment, you are trying to decide between using a DNA or RNA probe. Which would be ideal to use and why?

A) As both are composed of nucleic acids, using either would result in identical results.

B) An RNA probe because RNA has uracil bases.

C) A DNA probe because it is more stable than RNA.

D) A DNA probe because RNA cannot bind to DNA.

#3Which of the following will lower the Tm of a given DNA strand?

A)Increasing the percentage of GC base pairs

B) Raising the pH of the solution from extremely acidic to neutral

C) Decreasing the buffer concentration from 50mM NaCl to 5mM NaCl.

#4 Imagine Hershey/Chase had used an RNA virus (genome composed of RNA) instead of a DNA virus in their experiment. Would radioactivity still have been found in the pellet?

A) No, because the RNA genome would not enter the bacteria upon infection

B) No, because while DNA and RNA nucleotides are similar, they are not identical

C) Yes, because DNA and RNA nucleotides are similar

D) Yes, because genome in any form (DNA, RNA, protein) would be labeled similarly.

#5 Griffith and Avery's transformation experiments allowed us to identify that DNA is our genetic information. Which of the following scenarios would result in bacterial cells that are capable of killing mice upon injection?

A) Heat killed non-virulent bacteria is added to a live virulent bacteria strain

B) Heat killed virulent bacteria is added to a heat killed non-virulent bacteria strain.

C) Heat killed mouse cells are added to a non-virulent bacteria.

#6 The human genome consists mostly of non-coding DNA. Which of the following are benefits of this?

A) Random DNA mutations generally won't affect RNA and protein function

B) It is faster to duplicate the genome when these are present.

C) The existence of introns can lead to multiple variations of proteins encoded by a single gene.

D) It is unlikely transposons would exist in the genome if there was too much protein coding DNA.

harlequineel21

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