The formation of new DNA does NOT require energy
Indicate whether the statement is true or false.
Answer: FALSE
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A double-stranded DNA molecule contains a total of 120 purines and 120 pyrimidines. This DNA molecule could be composed of _____
A) 120 adenine and 120 uracil molecules B) 120 thymine and 120 adenine molecules C) 120 cytosine and 120 thymine molecules D) 120 adenine and 120 cytosine molecules E) 120 guanine and 120 thymine molecules
If N2 gas comprises 79% of atmospheric air at sea level, what is the partial pressure of N2?
a. about 300 mm Hg b. about 500 mm Hg c. about 600 mm Hg d. about 700 mm Hg
The oceans represent an important sink for anthropogenic CO2. In what form is the excess carbon stored?
A) as calcium carbonate sediments B) as solid methane C) as CO2 dissolved in water D) as atomic carbon coatings on inorganic particulates E) none of the above
Which of the following has a “no cyst” stage?
a. Giardia lamblia b. Entamoeba histolytica c. Trichomonas vaginalis d. None of these