
DSE2021(I)(B)(6)
Authored by Leung Kin梁志堅老師
Biology
2nd Grade
Used 2+ times

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4 questions
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1.
DROPDOWN QUESTION
5 mins • 1 pt
(TIPS:本題題及謗發『免疫力』,意思是針對【再次反應】,重點不應放在【首次】被病原體入侵的【初次反應】,背25課第16頁)
抗原Y進入人體後, (a) 會辨認出它是外抗原,
淋巴細胞會產生針對抗原Y的 (b) 。
若之後受具有 (c) 的 (d) 入侵時,記憶細胞會辨認出抗原Y,
記憶細胞迅速分裂成漿細胞,在短時間內產生 (e) ,把病原體消滅。
2.
DRAG AND DROP QUESTION
5 mins • 1 pt
答案:
1. 利用 (a) 的活的 (b) ;或
2. 利用已 (c) ;或
3. 病原體的 (d) 部分;或
4. 已失去 (e) 的病原體毒素
3.
DROPDOWN QUESTION
5 mins • 1 pt
(a) (b) (c) (d) (e) Cys
4.
DRAG AND DROP QUESTION
5 mins • 1 pt
(TIPS:本題中題目已寫明左邊是DNA兩股的「編碼鏈」,它沒參與製造mRNA,但與mRNA的A、G、C鹼基是一樣的,只是T被U取代。因此菌珠P的TGC會在mRNA形成UGC;菌珠Q的TGA會在mRNA形成UGA;菌珠R的AAC會在mRNA形成AAC)
本題答案:
(a) 。其變異發生於鹼基 (b) ,在mRNA形成鹼基 (c) ,是一個 (d) ,這使產生的多肽短了,使新的抗原 (e) ,針對抗原Y的記憶細胞不能辨認具有抗原Y的病原體X。
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