The 5' end of a DNA molecule can be chemically distinguished from the 3' end because there is a(n) __________ group at the 5' end and a(n) __________ group at the 3' end.
A) NH3; COOH
B) PO4; SO4
C) OH; H
D) PO4; OH
E) none of the above
D) PO4; OH
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The discovery of which of the following
allowed researchers to determine the sequences of nucleotides in DNA molecules?
a. single-nucleotide polymorphisms b. restriction enzymes c. DNA assembly enzymes d. fragment length polymorphisms e. receptor proteins
Approximately 95 percent of cases of cervical cancer are caused by _____.
A. cystoceles B. poor hygiene C. genetic factors D. the human papilloma virus (HPV)
Water and dissolved mineral are transported laterally from the secondary ____ to the secondary ____
a. phloem; xylem b. epidermis; peridem c. vascular cambium; cork cambium d. periderm; epidermis e. xylem; phloem
The chemical bond connecting one nucleotide with the next along one strand of a DNA molecule is called a
A. hydrogen bond. B. phosphodiester bond. C. phosphate bond. D. glycosidic bond. E. peptide bond.