Recent discoveries of fossils that surprisingly retain some coloration are the result of the preservation of:
A. preserved proteins.
B. preserved DNA in the nucleus of a cell.
C. preserved lipids such as cholesterol.
D. cellular melanosomes that produced
pigments.
D
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Cloned fragments of all of the DNA in a haploid
number of chromosomes characterizing a species is a a. cDNA library. b. transcribed DNA library. c. genomic library. d. gene library. e. plasmid library.
Which of the following pairs is mismatched?
A) Penicillin — antibiotic B) Chemotherapy — treatment of disease C) Normal microbiota — harmful D)Pathogen — disease causing
In batch fermentation, substrate is added continuously, and the product is siphoned off throughout the run.
Answer the following statement true (T) or false (F)
Normal cellular genes that can be mutated into cancer-causing genes are known as
A) oncogenes. B) growth factors. C) proto-oncogenes. D) viral proteins.