Several lines of evidence, including fossils and a genetic analysis of different groups of modern humans, suggest that our species originated and spread out from:
A) east Africa. B) central Europe. C) India. D) north Africa.
Answer: A
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A researcher obtains the results of his RNA-seq analysis. Several transcripts are listed as being derived from the same
gene. How is this possible?
a. Alternative splicing allows for different transcripts to be created by the same gene sequence. b. The researcher’s sample was contaminated. c. Exon shuffling allows for different transcripts to be created by the same gene sequence. d. Intron shuffling allows for different transcripts to be created by the same gene sequence. e. It is not possible; there was an error in the alignment process.
Jacob, Wollman, and others developed a linkage map of E. coli that is based on time. What form of recombination is involved in generating a linkage map based on time?
What will be an ideal response?
One of the first steps in obtaining a kayrotype is treating cells wiht a drug that stalls cells in mitosis. Why must cells arrest in mitosis for karyotype analysis?
A.) only in mitosis are homologous chromosomes paired up B.) only mitotic chromosomes are highly condensed and visible with a light microscope C.) only mitotic cells contain homologous chromosomes, because mitosis happens after DNA D.) only mitotic chromosome DNA is separated into single strands, allowing for stained by dyes
During exercise, O2 is depleted in muscle tissue. What effect would this have on internal respiration?
A) There would be decreased diffusion of O2 out of the blood and into the muscle tissue and a decrease in heart rate to bring more O2 to the exercising muscle. B) There would be decreased diffusion of O2 out of the blood and into the muscle tissue. C) There would be increased diffusion of O2 out of the blood and into the muscle tissue. D) There would be increased diffusion of O2 out of the blood and into the lungs.