Whether libraries are cDNA or genomic, whether amplification is based on PCR or cloning, and whether screening is done with northern or Southern blotting or probes, are all decisions based on which of the following?
A) complementarity
B) complementation
C) reverse transcription
D) reverse translation
E) gene expression
A
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If the diploid number of chromosomes in mouse somatic cells is 40, how many chromosomes are present during
prophase I?
a. 40, each comprised of a single paternal or maternal chromosome b. 80, each comprised of a pair of homologous chromosomes c. 20, each comprised of a single sister chromatid d. 80, each comprised of a single sister chromatid e. 40, each containing a pair of sister chromatids
Which organelles are visible with the light microscope?
a. nucleus b. nucleolus c. vacuole d. all of the above
Which of the following statements regarding HIV is incorrect?
A. PCR is the primary technique for detecting HIV in blood. B. The virus can enter into nervous tissues and cause abnormalities. C. The virus attaches to host cells with CD4 receptors. D. The viral DNA integrates into the host DNA. E. The virus becomes latent in host cells.
A large sample size decreases the likelihood that an experimental result will be significant.
a. true b. false