2021 DSE 生物-Biology 真题 答案 详解

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答案(中文)

評卷參考

本文件供閱卷員參考而設，並不應被視為標凖答案。考生及沒有參與評卷工作的教師在詳釋文件內容時應小心謹慎。

卷一

甲部

題號 答案 題號 答案
1. D (60%) 21. C (71%)
2. D (63%) 22. D (67%)
3. C (57%) 23. B (48%)
4. D (85%) 24. D (66%)
5. B (42%) 25. D (65%)
6. A (62%) 26. B (35%)
7. C (65%) 27. B (75%)
8. B (38%) 28. A (12%)
9. A (57%) 29. C (60%)
10. B (52%) 30. B (44%)
11. C (63%) 31. B (30%)
12. C (58%) 32. A (54%)
13. A (53%) 33. B (80%)
14. A (73%) 34. C (61%)
15. D (75%) 35. A (47%)
16. D (40%) 36. C (54%)
17. C (38%)
18. A (68%)
19. C (73%)
20. D (70%)

註：括號內數字為答對百分率。

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答案(英文)

Marking Schemes

This document was prepared for markers' reference. It should not be regarded as a set of model answers. Candidates and teachers who were not involved in the marking process are advised to interpret its contents with care.

Paper 1

SECTION A

Question No. Key Question No. Key

1. D (60%) 21. C (71%)

2. D (63%) 22. D (67%)

3. C (57%) 23. B (48%)

4. D (85%) 24. D (66%)

5. B (42%) 25. D (65%)

6. A (62%) 26. B (35%)

7. C (65%) 27. B (75%)

8. B (38%) 28. A (12%)

9. A (57%) 29. C (60%)

10. B (52%) 30. B (44%)

11. C (63%) 31. B (30%)

12. C (58%) 32. A (54%)

13. A (53%) 33. B (80%)

14. A (73%) 34. C (61%)

15. D (75%) 35. A (47%)

16. D (40%) 36. C (54%)

17. C (38%)

18. A (68%)

19. C (73%)

20. D (70%)

Note: Figures in brackets indicate the percentages of candidates choosing the correct answers.

44

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真题 Paper 1(中文)

本试卷共設36題。試卷內的圖未必依照比例繪成。

參考下面，解答第1至3題。下面顯示細胞內基因表達的流程：

1. X代表 A. 轉移 RNA B. DNA 模板 C. 核糖體 RNA D. 信使 RNA

2. Y可以是 (1) 酶 (2) 激素 (3) 抗體 A. 只有 (1) 和 (2) B. 只有 (1) 和 (3) C. 只有 (2) 和 (3) D. (1)(2)和(3)

3. 以下哪項組合正確指出過程 P 是什麼及過程 Q 在哪裏發生？ 過程 P 是什麼 A. 翻譯 B. 翻譯 C. 翻譯 D. 翻譯 過程 Q 在哪裏發生 A. 細胞質 B. 細胞核 C. 細胞質 D. 細胞核

4. 以下哪對分子含有最多的能量儲備？ A. ADP 和 NAD B. ADP 和 NADH C. ATP 和 NAD D. ATP 和 NADH

2021 DSE 生物科

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真题 Paper 2(中文)

甲部 人體生理學：調節與控制 回答本部分內的所有試題。

(a)兩名年青學生小美和小光進行一連串強度漸增的登階運動·他們每次運動都以一固定速度（每10秒鐘2次、6次或10次）上落木箱，歷時3分鐘，如下圖所示：

在静止狀態和每次運動後立即量度他們的心率和血液乳酸濃度。在進行下一次運動之前，容許兩名學生休息，直至心率和血液乳酸濃度回復靜止狀態時的水平。結果如下表所示：

運動强度（每10秒登階次数）	心率（每分钟跳動次数）	血液乳酸濃度（mmol/L）
0（静止狀態）	小美：58	小光：80
2	小美：64	小光：91
6	小美：94	小光：132
10	小美：130	小光：178

(i) 描述增加運動强度對心率和血液乳酸濃度的整體效應。（1 分）

(ii) 根據你在 (i) 的答案，解釋在運動期間血液乳酸濃度的變化。（3 分）

(iii) 参考你在 (i) 的答案，描述神經系統如何引致在運動期間心率的变化。（4 分）

(iv) 小美是一名受過訓練的運動員。從數據中舉出兩項證據以支持這個說法。（2 分）

2021-DSB-BIO 2-2

36

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真题 Paper 1(英文)

2021-DSE BIO PAPER 1A HONG KONG EXAMINATIONS AND ASSESSMENT AUTHORITY HONG KONG DIPLOMA OF SECONDARY EDUCATION EXAMINATION 2021 BIOLOGY PAPER 1 8:30 am - 11:00 am (2 hours 30 minutes) This paper must be answered in English GENERAL INSTRUCTIONS (1) There are TWO sections, A and B, in this Paper. You are advised to finish Section A in about 35 minutes. (2) Section A consists of multiple-choice questions in this question paper. Section B contains conventional questions printed separately in Question-Answer Book B. (3) Answers to Section A should be marked on the Multiple-choice Answer Sheet while answers to Section B should be written in the spaces provided in Question-Answer Book B. The Answer Sheet for Section A and the Question-Answer Book B for Section B will be collected separately at the end of the examination. INSTRUCTIONS FOR SECTION A (MULTIPLE-CHOICE QUESTIONS) (1) Read carefully the instructions on the Answer Sheet. After the announcement of the start of the examination, you should first stick a barcode label and insert the information required in the spaces provided. No extra time will be given for sticking on the barcode label after the 'Time is up' announcement. (2) When told to open this book, you should check that all the questions are there. Look for the words 'END OF SECTION A' after the last question. (3) All questions carry equal marks. (4) ANSWER ALL QUESTIONS. You are advised to use an HB pencil to mark all the answers on the Answer Sheet, so that wrong marks can be completely erased with a clean rubber. You must mark the answers clearly; otherwise you will lose marks if the answers cannot be captured. (5) You should mark only ONE answer for each question. If you mark more than one answer, you will receive NO MARKS for that question. (6) No marks will be deducted for wrong answers. © Hong Kong Examinations and Assessment Authority All Rights Reserved 2021 Not to be taken away before the end of the examination session 2021-DSE-BIO 1A-1 1 Provided by dse.life

真题 Paper 2(英文)

2021-DSE BIO PAPER 2

HONG KONG EXAMINATIONS AND ASSESSMENT AUTHORITY HONG KONG DIPLOMA OF SECONDARY EDUCATION EXAMINATION 2021

BIOLOGY PAPER 2

11:45 am – 12:45 pm (1 hour)

This paper must be answered in English

INSTRUCTIONS

(1) There are FOUR sections, A, B, C and D in this Paper. Attempt ALL questions in any TWO sections.

(2) Write your answers in the Answer Book DSE (C) provided. Start each question (not part of a question) on a new page.

(3) Present your answers in paragraphs wherever appropriate.

(4) Illustrate your answers with diagrams wherever appropriate.

(5) The diagrams in this paper are NOT necessarily drawn to scale.

© Hong Kong Examinations and Assessment Authority All Rights Reserved 2021

2021-DSE-BIO 2-1

Not to be taken away before the end of the examination session

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