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  3. Leptin is effective in reducing weight but it’s many years away before humans ca

Leptin is effective in reducing weight but it’s many years away before humans ca

游客2023-07-12  50
问题 Leptin is effective in reducing weight but it’s many years away before humans can use it. [br] The ob gene causes the fat cells to produce the hormone leptin. The fatter, the more hormones are produced.
选项 A、Y
B、N
C、NG
答案 A
解析 由文章第五段第一句“Because leptin is produced in fat tissue，the fatter an animal is，the more leptin its cells should make”可知，leptin是由脂肪细胞分泌的，老鼠越胖，分泌的leptin越多。文中用了protein(第四段第一句)和hormone(第四段第三句)来指leptin。
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