Text: Lead's high density, atomic number, and formability form the basis for use of lead as a barrier that absorbs sound, vibration, and radiation. Lead has no natural resonance frequencies; as a result, sheet-lead is used as a sound deadening layer in the walls, floors, and ceilings of sound studios. Organ pipes are often made from a lead alloy, mixed with various amounts of tin to control the tone of each pipe. Lead is an established shielding material from radiation in nuclear science and in X-ray rooms due to its denseness and high attenuation coefficient. Molten lead has been used as a coolant for lead-cooled fast reactors.

Question: does lead have any important uses in nuclear science?
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Answer: yes

Text: Neither of these theories has been endorsed by the Supreme Court, which has held that the clause means that a state may not discriminate against citizens of other states in favor of its own citizens. In Corfield v. Coryell, 6 F. Cas. 546 (C.C.E.D. Pa. 1823), the federal circuit court held that privileges and immunities in respect of which discrimination is barred include

Question: do states have the power to discriminate against citizens of other states?
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Answer: no

Text: When synthesizing new DNA, DNA polymerase can add free nucleotides only to the 3' end of the newly forming strand. This results in elongation of the newly forming strand in a 5'--3' direction. No known DNA polymerase is able to begin a new chain (de novo); it can only add a nucleotide onto a pre-existing 3'-OH group, and therefore needs a primer at which it can add the first nucleotide. Primers consist of RNA or DNA bases (or both). In DNA replication, the first two bases are always RNA, and are synthesized by another enzyme called primase. Helicase and topoisomerase II are required to unwind DNA from a double-strand structure to a single-strand structure to facilitate replication of each strand consistent with the semiconservative model of DNA replication.

Question: can a dna polymerase initiate new strand of nucleic acid independently?
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Answer: no

Text: The Stanley Cup playoffs (French: Les series eliminatoires de la Coupe Stanley) is an elimination tournament in the National Hockey League consisting of four rounds of best-of-seven series. Eight teams from each of the two conferences qualify for the playoffs based on regular season points totals. The final round is commonly known as the Stanley Cup Finals, which sees the two conference champions play for the Stanley Cup.

Question: is first round of hockey best of 5?
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Answer:
no