BIO204 Final f10 v0-w-Answer

BIO204 Final f10 v0-w-Answer - 1 Which of the following...

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1. Which of the following would NOT be considered a ‘scientific question’? A. How abundant is tree “X” in this area? B. What plants are competing with tree “X” for sunlight? C. How does the surface area of the leaves on tree “X” compare with their location? D. Why is tree “X” present in this area? E. All of the above would be considered scientific questions 2. Larry and his team notice that the soil in their forest plot is very damp and contains lots of moss as well as other short vegetation (< 1 foot high). They are most likely observing this layer of the forest. A. soil profile B. herb layer C. shrub layer D. sub-canopy layer E. canopy layer 3. Martha reads a DNA sequence to determine the amino acids of its encoded protein. She diagrams the results below. Which of the following would be proper conclusions about Martha’s diagram? A. Martha has not diagrammed her DNA sequence properly because there should be one continuous rectangular box per gene. B. Martha’s data shows that the encoded protein has more than one subunit and therefore possesses quaternary structure. C. Martha’s gene has several introns and exons with varying numbers of nucleotides. D. Martha's protein contains domains and belongs to a gene superfamily. E. B, C and D 4. A researcher isolates human protein "R" and compares it to the same protein from two other animal species. Position 343 of human protein R contains aspartic acid, an acidic amino acid. This amino acid participates in a salt bridge in the human protein. animal species 1: position 343 of protein R contains the basic amino acid lysine animal species 2: position 343 of protein R contains the acidic amino acid glutamic acid Based on the information above, which of the following statements is TRUE ? A. The salt bridge interaction at position 343 of protein R in animal species 1 is most likely maintained. B. The salt bridge interaction at position 343 of protein R in animal species 2 is most likely maintained. C. The salt bridge interaction at position 343 of protein R in animal species 1 is most likely destroyed. D. The salt bridge interaction at position 343 of protein R in animal species 2 is most likely destroyed. E. B and C 5. A student prepares two samples of a pure protein. Both samples are treated with SDS and heat. One of the samples is subsequently treated with dithiothreitol (DTT), a compound that disrupts disulfide bridges. Their SDS-polyacrylamide gel is shown on the right. What can you conclude from their stained gel (assume no peptide bonds are broken after any of the treatments)? A. The protein has quaternary structure B. The protein is composed of two subunits C. The protein contains at least one disulfide bond D. A, B, and C E. A and C 6. Craig isolates the DNA for gene X from five African clawed frogs ( Xenopus laevis ). One of the frogs is a wild- type, untreated frog, while the remaining four frogs were all exposed to an environmental toxin which led to
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mutations in their DNA. Part of each sequence of gene X is shown below. Which of the following sequences (if
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BIO204 Final f10 v0-w-Answer - 1 Which of the following...

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