Chromosome inversions often result from a multistep process that begins when radiation causes ________
A) a duplication event, followed by reannealing of chromosomes
B) four double-stranded breaks in a chromosome
C) two double-stranded breaks in a chromosome
D) two single-stranded breaks in a chromosome
C
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Which of the following best describes Sanger sequencing?
A. By using dideoxynucleotides that don't have a triphosphate group, there is no energy to add it to the growing nucleotide strand and hence it stops replication. B. By using dideoxynucleotides, it stops the addition of another nucleotide after it. This can then be run on a regular gel to determine the sequence. C. By using dideoxynucleotides, it stops the addition of another nucleotide. These are known as chain terminators and have been labeled with a specific probe to allow for detection and hence the sequence. D. By using dideoxynucleotides, you can tell where they have been incorporated by using microarray analysis. E. By using dideoxynucleotides, you can tell where they have been incorporated by the difference in weight.
Most human pathogens grow best at temperatures near
A. 20ºC. B. 25ºC. C. 37ºC. D. 45ºC.
The toxins of stingrays are destroyed with hot water, therefore they are a type of:
a. protein. b. carbohydrate. c. fat. d. lipid. e. DNA.
Living members of the lineage ____ are the ray-finned fishes, with fins supported by thin and flexible bony rays. This lineage includes over 95 percent of the living species of fishes.
a. Petromyzontoidea b. Chondrichthyes c. Actinopterygii d. Myxinoidea e. Sarcopterygii