Which of the following statement related to PMO is not correct?（）

A.The specific form, function, and structure of a PMO are dependent upon the needs of the organization that it supports.

B.One of the key features of a PMO is managing shared resources across all projects administered by the PMO.

C.The PMO focuses on the specified project objectives.

D.The PMO optimizes the use of shared organizational resources across all projects.

降钙素是一种多肽类激素，临床上用于治疗骨质疏松症等。人的降钙素活性很低，半衰期较短。某科学机构为了研发一种活性高、半衰期长的新型降钙素，从预期新型降钙素的功能出发，推测相应的脱氧核苷酸序列，并人工合成了两条72个碱基的DNA单链，两条链通过18个碱基对形成部分双链DNA片段，再利用游离的脱氧核苷酸和Klenow酶补平，获得双链DNA，过程如下图。在此过程中发现，合成较长的核苷酸单链易产生缺失碱基的现象。请据图回答：

Klenow酶是一种（）酶，合成的双链DNA有（）个碱基对。