What types of bonds are formed between complementary DNA bases?
A) glycosidic bonds
B) phosphodiester bonds
C) covalent bonds
D) hydrogen bonds
E) ionic bonds
D
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About 4% of those of Northern European descent are carriers for ____, an autosomal recessive genetic
disorder where a defective membrane transport protein leads to abnormal chloride levels in extracellular fluids.
a. Duchenne muscular dystrophy b. phenylketonuria c. achondroplasia d. sickle-cell anemia e. cystic fibrosis
The promotion of the lactose operon in bacteria is
a. activated by a repressor protein. b. independent of glucose concentration. c. activated by lactose binding. d. regulated by RNA polymerase. e. regulated by mRNA.
The ________ of atoms determine how atoms will react with each other.
A. protons B. electrons C. nuclei D. neutrons
In the nitrate test, which of the following products turns the reagents used in the test red?
A. Nitrite salts B. Nitric acid C. Nitrate salts D. Nitrogenous molecules