近年来,由于美国名牌大学的医学、生物医学、生物基因等学科成为申请热门专业;因此,高中生如果在USABO中取得了优异成绩,那么便会拥有申请这些专业时的重要优势,从而顺利进入美国常春藤院校。同时,在学术活动中获奖的学生还将有机会受邀参加国际顶级科学类活动的邀请。美国生物奥赛(usabo)2022报名通道及真题已开放!
报名截止时间:
2022年3月30日
【扫码联系老师领取报名表】
比赛形式:
线上(需配备带摄像头的电脑和手机移动设备)线下(各城市及就近考点)个人赛,笔试试卷,没有实验
部分真题及答案:
1.Suppose radioactive thymine was added to an actively dividing culture of E. coli bacteria. What would happen if a cell replicated once in the presence of this radioactive base?
A. Only one daughter cell would have radioactive DNA
B. Neither of the two daughter cells would be radioactive
C. All four DNA bases would be radioactive
D. Radioactive thymine would pair with nonradioactive guanine
E. DNA in both daughter cells would be radioactive
2.If radioactive sulfur (35S) is used in the culture medium of bacteria that harbor bacteriophage viruses, it will later appear in:
A. Bacterial RNA
B. Bacterial cell wallsBacterial cell walls
C. Bacterial cell walls
D. Viral RNA
E. Viral coats
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