Which of the following correctly describes uracil and where is it found?
A) It is a nitrogenous base found in DNA and RNA.
B) It is a nitrogenous base found in DNA only.
C) It is a nitrogenous base found in RNA only.
D) It is a nitrogenous base found only in nucleotides of molecules other than RNA and DNA.
Ans: C) It is a nitrogenous base found in RNA only.
You might also like to view...
Uterine contractions are most likely an example of
a. a unique human reproductive phenomena. b. negative feedback. c. positive feedback. d. programmed events. e. positive feedback and programmed events.
When a eukaryotic cell divides, the daughter cells
a. manufacture all new organelles from material in the cytoplasm. b. receive enough of the organelles to start up the new cells and produce additional organelles as needed. c. produce individual organelles that attach to the spindle fibers and are distributed just like chromosomes. d. produce an equal number of organelles distributed to each cell. e. get cellular organelles by an unknown process.
In striated muscle contraction, the Ca2+-ATPase pump
A) releases Ca2+ from the T tubule. B) secretes Ca2+ from the axon terminal. C) is voltage-gated. D) decreases Ca2+ in the sarcoplasm. E) increases Ca2+ binding to TnC.
Which hypothesis states that life developed from nonliving matter?
a. abiotic evolution b. natural selection c. organic evolution d. chemical evolution e. inorganic evolution