Dideoxynucleotides
A. are useful in nucleic acid sequencing.
B. have two additional hydroxyl groups at the 2' and 3' carbons.
C. act as chain initiators.
D. act as chain terminators.
E. are useful in nucleic acid sequencing AND act as chain terminators.
E
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The low success rate and age-related diseases associated with reproductive cloning is thought to be due to
A. genetic imprinting. B. the age of the donor cell. C. cell cycle problems. D. large offspring syndrome (LOS).
Insulin
A. is used to treat type 1 diabetes. B. is produced by the pancreas. C. is secreted by islets of Langerhans. D. levels increase after eating foods high in carbohydrates. E. All of the answer choices are correct.
Most hospitals in the United States routinely test all newborns for ____, an autosomal recessive disorder in which a
metabolic abnormality causes a buildup of compounds that damage brain tissue and can lead to mental retardation unless a restricted diet is followed
a. Duchenne muscular dystrophy b. phenylketonuria c. achondroplasia d. sickle-cell anemia e. cystic fibrosis
Which of the following protist groups does NOT include members that move by means of flagella?
a. Rhodophyta b. Excavates c. Alveolates d. Cercozoa e. Heterokonts