15. Which of the following are more likely found in a Paramecium protist than in

Question

15. Which of the following are more likely found in a Paramecium protist than in a
Salmonella bacterium? [*This is a multiple answer question, please mark all that apply.]1
a. Ribosomes
b. A membrane-bound nucleus
c. Mitochondria
d. Clathrin-coated pits.

2-We have obtained sequence data for ß-tubulin genes from eight species of Foraminifera (forams) and a-tubulin sequences from four species, sampling major taxonomic groups from a wide range of environments. Analysis of the ß-tubulin sequences demonstrates that foram ß-tubulins possess the highest degree of divergence of any tubulin gene sequenced to date and represent a novel form of the protein. In contrast, foram a-tubulin genes resemble the conventional a-tubulins seen
in other organisms. Partition homogeneity analysis shows that the foraminiferal ß tubulin gene has followed an evolutionary path that is distinct from that of all other organisms. Our findings indicate that positive selective pressure occurred on the ß-tubulin subunit in ancestral forams prior to their diversification. (Molecular Biology and Evolution, 2005)Based on this passage and your knowledge from lecture,
which statements are TRUE?[This is a multiple answer question,please select all that apply.]
a. The researchers writing this abstract were studying microtubules.
b. The researchers writing this abstract were studying intermediate filaments.
c. The microtubules of Foraminifera may serve their function in a slightly different way than they do in any other organism.
d. Foraminifera are likely unable to form pseudopodia

Explanation / Answer

15. Which of the following are more likely found in a Paramecium protist than in a
Salmonella bacterium? [*This is a multiple answer question, please mark all that apply.]1
a. Ribosomes
b. A membrane-bound nucleus
c. Mitochondria
d. Clathrin-coated pits.

2-We have obtained sequence data for ß-tubulin genes from eight species of Foraminifera (forams) and a-tubulin sequences from four species, sampling major taxonomic groups from a wide range of environments. Analysis of the ß-tubulin sequences demonstrates that foram ß-tubulins possess the highest degree of divergence of any tubulin gene sequenced to date and represent a novel form of the protein. In contrast, foram a-tubulin genes resemble the conventional a-tubulins seen
in other organisms. Partition homogeneity analysis shows that the foraminiferal ß tubulin gene has followed an evolutionary path that is distinct from that of all other organisms. Our findings indicate that positive selective pressure occurred on the ß-tubulin subunit in ancestral forams prior to their diversification. (Molecular Biology and Evolution, 2005)Based on this passage and your knowledge from lecture,
which statements are TRUE?[This is a multiple answer question,please select all that apply.]

a. The researchers writing this abstract were studying microtubules.
b. The researchers writing this abstract were studying intermediate filaments.
c. The microtubules of Foraminifera may serve their function in a slightly different way than they do in any other organism.
d. Foraminifera are likely unable to form pseudopodia

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