All of the cells in the human body, except for sperm and eggs, have 46 chromosomes.
Answer the following statement true (T) or false (F)
False
Red blood cells lack a nucleus and therefore have no chromosomes. Liver cells often have multiple copies of each chromosome and therefore can have 69 or more chromosomes.
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Events that occur during transcriptional regulation in eukaryotes include
A. DNA replication. B. mRNA translation. C. RNA processing and export from the nucleus. D. polypeptide synthesis. E. chromatin conversion to a closed conformation.
Saturation can be defined as
A) denaturation of an enzyme. B) the inability to increase reaction velocity beyond a finite upper limit. C) inhibition of enzyme function by blocking the active site. D) the substrate concentration at which velocity reaches one-half maximum velocity. E) a characteristic of all uncatalyzed reactions.
Genetic recombination involves the use of ____ enzymes to cut out segments of DNA.
A. restriction endonuclease B. snurp C. ligase D. DNA polymerase
What is the fundamental purpose of staining in light microscopy?
a. To kill the specimen b. To make the specimen appear larger in the microscope c. To see the specimen without the aid of a microscope d. To increase the contrast and visibility of the specimen