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【简答题】If there is only an expiry date in the L/C without a shipment date，the expiry date is regarded as the latest shipment date．（ ）
【单选题】If the L/C stipulate that the expiry date is July 31st without a shipment date, then the latest shipment date is also July 31 st. ( )
A.
正确
B.
错误
【单选题】According to the text, telomeres_____________- .
A.
can make a cell die quickly
B.
can help prevent DNA from separating
C.
become shorter before they die
D.
are at the ends of people’s chromosomes
【单选题】A drug that inhibits DNA replication, but is inactivated by chromosomes containing telomeres, would prove to be a very useful antibiotic. Telomeres can be best described by which one of the following?
A.
Telomeres are only present in circular chromosomes.
B.
Before telomerase action, and after DNA replication, there is a 3 ′ overhang of the newly synthesized strand.
C.
Before telomerase action, and after DNA replication, there is a 5 ′ overhang of the strand being replicated.
D.
In human DNA, telomeres consist of repeating sequences of TTAGGT.
【简答题】Telomeres
【简答题】If the L/C simply stipulates an expiry date without a shipment date，it means that（ ）．
【简答题】telomeres
【判断题】Without telomeres, linear eukaryotic chromosomes would get shorter and shorter with each round of DNA replication.
A.
正确
B.
错误
【简答题】we【L18】______if we urge changes in national policy without
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