An insertion sequence is distinguishable from other mobile genetic elements because
A. it encodes a transposase.
B. it is composed of DNA.
C. it is highly complex.
D. it is smallest.
Answer: D
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________ refers to the removal of an amino group from an amino acid. One mechanism for this removal is ________, in which the amino group is transferred to an acceptor molecule.
A. Deamination; transamination B. Deamination; hydrolysis C. Transamination; deamination D. Hydrolysis; transamination
What do mitochondria and chloroplasts have in common?
a. both are found in plants cells b. both contain chlorophyll c. DNA is present in both d. ribosomes are present in both e. both are found in plants cells, and DNA and ribosomes are present in both
Which statement about dinosaurs is FALSE?
a. Some species lived in social groups and hunted in packs. b. Dinosaurs were all slow-moving, with relatively low metabolic rates. c. Fossils of dinosaurs with feathers suggest that feathers first evolved to provide insulation. d. Dinosaur social behaviors include courtship rituals and parental nurturing of the young. e. Dinosaurs underwent an extensive radiation throughout the Jurassic and Cretaceous periods.
What is the term for a single main root that is adapted for storage and which typically grows downward and fairly deep?
a. a rhizome b. a tuber c. a taproot d. a fibrous root