劑 0o呈 CC)】frequent WD) distinctive
一 第16至20顯為顯組人一一 MR
One factor that separates aliving thing from an inanimate objectis the organismysability to carry out
“hemical reactions that are crucial for its survival. Imagine the infinite amount of reactions that alarge
organism such as human carries out every single day. _16 of these reactions are possible without
enzymes.
Enzymes consist of various types of proteins that work to drive the chemical reactions _17 for
Certain types ofnutrients to take effect. Enzymes can either launch areaction or speed it ul
一18 .This is why es are crucial in the sustenance ofHife on earth.
Enzymes, 一19 (, do notjalways function perfectly. In 1902 Sir Arehibald Garrod was the first to
attribute a _20 to an en雪fne defect, which he later referred to as an “inbom error of metabolism.
Today, newborns are routinely screened for certain enzyme defects such as PKU (phenylketonuria) and
galactosemia, an error in the handling ofthe sugar galactose.
16. (A) Amy (B) Al (CONome (D) More
局1 (Arequies (B) required (crequiring (D)torequire
台 18. (A)a引 (B) athand (catfimt (D)atease
19. (A) hereafter (B) instead (olikewise (D)however
M 20. (A) disease (B) balanee (C) measure (D) statement
三、文意選填(占10分 )