Which of the following restriction enzyme sites would produce blunt-ended fragments? (The arrow represents the cutting site of the enzyme.)
A) C?CGG
B) G?GATCC
C) G?AATTC
D) CCC?GGG
E) A?AGCTT
D
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The observation that SNPs account for most of the differences in the coding regions between the human and
chimpanzee genomes suggests that ____. a. the two genomes are too different to suggest an evolutionary relationship b. Neanderthals descended directly from chimpanzees c. small changes in amino acid sequences account for big differences in phenotype d. most of the differences in phenotype are due to DNA sequence changes e. humans descended directly from chimpanzees
Which of the following is true of diabetes mellitus type 1?
A) Patients always require insulin. B) Cells become resistant to insulin. C) Most people with diabetes mellitus have this form. D) It can be delayed or prevented.
Which one of the following is the main reason that a typical eukaryotic gene is able to respond to a far greater variety of regulatory signals than a typical prokaryotic gene or operon?
(a) Eukaryotes have three types of RNA polymerase. (b) Eukaryotic RNA polymerases require general transcription factors. (c) The transcription of a eukaryotic gene can be influenced by proteins that bind far from the promoter. (d) Prokaryotic genes are packaged into nucleosomes.
Hair cells are delicate sensors of sound, movement, and gravity. They are stimulated by movement of the stereocilia, which are actually microvilli, and the single kinocilium, which is a true cilium.One patient at your audiology clinic has an actin defect, and another patient has a microtubule defect. What sense other than hearing may be affected in these patients?
A. Touch B. Taste C. Balance D. Proprioception E. Smell