How would a large chromosomal inversion affect the expression of a gene if the gene is located between the two break points but no breaks occur within the gene?
A. The gene would not be transcribed because it would be oriented in the wrong direction.
B. The gene would be transcribed normally, but the mRNA would be translated in the 3' to 5' direction.
C. The gene would be transcribed in the 3' to 5' direction.
D. The inversion would probably have no effect on gene expression.
Answer: D
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Small chromosomal duplications provide raw material for the addition of genes into a species' genome. These duplications create two or more copies of the same gene, where one or both of the genes can subsequently mutate. These genes are referred to as
A. sister chromatids. B. homologous chromosomes. C. homologous genes. D. transposable elements. E. duplicated chromosomes.
Which of the following choices is an example of a positive feedback mechanism?
a. ceasing exercise when tired b. sweating when hot c. contractions in childbirth increasing production of oxytocin d. eating when hungry and stopping when full
________ is the field concerned with the management and analysis of biological data using computers.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements is FALSE?
A) DNA polymerase joins nucleotides in one direction only. B) The leading strand of DNA is made continuously. C) The lagging strand of DNA is started by an RNA primer. D) DNA replication proceeds in one direction around the bacterial chromosome. E) Multiple replication forks are possible on a bacterial chromosome.