阿摩線上測驗
15. Which of the following descriptions about COVID-19 virus is NOT correct?
(A) The RNA-dependent RNA polymerase is a primary target for anti-COVID-
19 virus drug remdesivir.
(B) Antigenic drit is a kind of genetic variation that can result in a new strain of
COVID-19 virus particles.
(C) Coronaviruses are prone to undergo antigenic shift by combining two
different viruses to make a novel strain.
(D) COVID-19mRNA vaccines contain the instructions for making the SARS-
CoV-2 spike protein
(E) COVID-19 mRNA vaccines require to be stored at an ultra-cold freezer at
temperatures between -80*C and -60*C for up to 6 months.
答案：登入後查看
統計： A(6), B(4), C(13), D(4), E(2) #3086638
統計： A(6), B(4), C(13), D(4), E(2) #3086638
詳解 (共 2 筆)
u106005412
#6371962
抗原漂變 (antigenic drift)病毒在「點突變」下，表面抗原（如棘蛋白或血球凝集素）慢慢改變
抗原轉變 (antigenic shift) 整段基因重組（基因重配），產生一整組新抗原，易大流行
ㅤㅤ
COVID-19 的變種（如 Omicron）都是靠棘蛋白（Spike）基因的點突變，不是基因重組
因為Covid為不分段單股RNA，很難像流感（8段RNA)那樣發生antigenic shift~
可以解釋為何我們每年都要重新施打流感疫苗，而不用每年施打covid疫苗
4
0
