In humans, one pair of pharyngeal pouches become the tube-shaped organ called the
A. esophagus.
B. trachea.
C. Eustachian tube.
D. bronchial tube.
E. pharynx.
C. Eustachian tube.
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Treponema pallidum
A. is missing several important genes essential for DNA replication. B. requires protein factors found in blood. C. lacks numerous biosynthetic pathways and thus has numerous nutritional requirements. D. is missing the pathway for peptidoglycan synthesis.
You have to light a fuse before a firecracker will explode. Would you classify this as an energy- releasing or an energy- absorbing reaction? Please explain your answer
What will be an ideal response?
During bacterial conjugation, interrupted matings yielded the following information: leu 10 minutes, arg 8 minutes, str 15 minutes, and amp 12 minutes. Based on this information, the order of the genes, beginning at the origin, is
A) amp-arg-leu-str. B) str-amp-leu-arg. C) leu-arg-str-amp. D) arg-amp-leu-str. E) arg-leu-amp-str.
Mitochondrial disorders can be caused by mutations in all the following except
A. cytoplasmic DNA B. nuclear DNA C. mitochondrial DNA