16.4· 33 questions · 33 marks · 40 min · 2018–2025· Multiple choice
Every Cambridge IGCSE Biology (9-1) Paper 1 question on sexual reproduction in humans, laid out as 10 A4 pages with the mark scheme below. Nothing is left out. Free to read, no account.


1 / 10

2 / 10


3 / 10


4 / 10
5 / 10

6 / 10

7 / 10




8 / 10


9 / 10
10 / 10Answers below. Sit the paper first if you are practising.
Pastlit
Biology (9-1) 0970 · Sexual reproduction in humans — Paper 1
IGCSE · topical answer key — answer key (teacher use)
Question
Answer
Marks
| Question | Answer | Marks | From |
|---|---|---|---|
| 1 | B | 1 | 0970/11 May/June 2018 |
| 2 | D | 1 | 0970/11 May/June 2018 |
| 3 | C | 1 | 0970/12 Oct/Nov 2018 |
| 4 | C | 1 | 0970/12 Oct/Nov 2018 |
| 5 | D | 1 | 0970/11 May/June 2019 |
| 6 | A | 1 | 0970/11 May/June 2019 |
| 7 | B | 1 | 0970/12 Oct/Nov 2019 |
| 8 | A | 1 | 0970/11 May/June 2020 |
| 9 | A | 1 | 0970/11 May/June 2020 |
| 10 | D | 1 | 0970/12 May/June 2020 |
| 11 | B | 1 | 0970/12 May/June 2020 |
| 12 | B | 1 | 0970/12 Oct/Nov 2020 |
| 13 | B | 1 | 0970/12 Oct/Nov 2020 |
| 14 | C | 1 | 0970/11 May/June 2021 |
| 15 | C | 1 | 0970/11 May/June 2021 |
| 16 | D | 1 | 0970/12 Oct/Nov 2021 |
| 17 | D | 1 | 0970/11 May/June 2022 |
| 18 | A | 1 | 0970/12 May/June 2022 |
| 19 | B | 1 | 0970/12 May/June 2022 |
| 20 | C | 1 | 0970/12 Oct/Nov 2022 |
| 21 | A | 1 | 0970/12 May/June 2023 |
| 22 | C | 1 | 0970/12 Oct/Nov 2023 |
| 23 | B | 1 | 0970/11 May/June 2024 |
| 24 | D | 1 | 0970/11 May/June 2024 |
| 25 | A | 1 | 0970/12 May/June 2024 |
| 26 | C | 1 | 0970/12 May/June 2024 |
| 27 | D | 1 | 0970/12 Oct/Nov 2024 |
| 28 | D | 1 | 0970/12 Oct/Nov 2024 |
| 29 | A | 1 | 0970/11 May/June 2025 |
| 30 | D | 1 | 0970/12 May/June 2025 |
| 31 | A | 1 | 0970/12 May/June 2025 |
| 32 | A | 1 | 0970/12 Oct/Nov 2025 |
| 33 | C | 1 | 0970/12 Oct/Nov 2025 |
29 Which row correctly links the named process with its description? process description A menstruation release of an egg B menstruation shedding of the lining of the uterus C ovulation fusion of nuclei D ovulation start of puberty
1 marks
Answer: B
31 Which method of birth control involves a surgical procedure? A condom B contraceptive pill C monitoring body temperature and cervical mucus D vasectomy
1 marks
Answer: D
26 The diagram shows the female reproductive system. Where does implantation normally occur? C B A D
1 marks
Answer: C
28 The diagram shows a timeline of a woman’s menstrual cycle, which lasts for 28 days. 13 14 15 16 12 17 11 18 10 19 9 20 8 21 7 22 6 23 5 menstruation 24 (period) 4 25 3 26 2 27 1 28 On which days of the menstrual cycle is a woman most likely to become pregnant? A days 1– 4 B days 7–10 C days 13–16 D days 20–23
1 marks
Answer: C
30 In humans, what is an example of a secondary sexual characteristic in both males and females? A hair grows on face B hips widen C fat is deposited on hips and thighs D sexual organs grow
1 marks
Answer: D
31 Which contraceptive method could provide protection from sexually transmitted infections? A condom B diaphragm C hormone implant D vasectomy
1 marks
Answer: A
28 The diagram shows the female reproductive system. 3 2 4 1 Where does fertilisation normally occur? A 1 and 2 B 2 only C 3 and 4 D 4 only
1 marks
Answer: B
29 What happens to the uterus lining during menstruation? A breaks down B new blood vessel growth C implantation of embryo D repair and thickening
1 marks
Answer: A
30 The diagram of the female reproductive system shows where different methods of birth control can be used. Where would an IUD be placed? B A C D
1 marks
Answer: A
29 When do the following stages occur in a typical human menstrual cycle? bleeding ovulation A days 13 – 14 days 6 – 25 B days 1 – 4 days 27 – 28 C days 6 – 25 days 1 – 4 D days 1 – 4 days 13 – 14
1 marks
Answer: D
30 The graph shows the number of pregnancies in 4 groups of 100 women. Each group used a different method of contraception. 20 number of 10 pregnancies 0 contraceptive intra-uterine diaphragm monitoring body pill device (IUD) temperature The method of contraception which is the most effective is A barrier. B chemical. C natural. D surgical.
1 marks
Answer: B
30 During childbirth, what must happen to the amniotic sac, cervix and the uterus wall? amniotic sac cervix uterus wall A breaks contracts contracts B breaks dilates contracts C expands contracts relaxes D expands dilates relaxes
1 marks
Answer: B
31 What is a barrier method of birth control? A contraceptive pill B diaphragm C contraceptive implant D vasectomy
1 marks
Answer: B
31 Which structure in the male reproductive system makes the fluid for sperm to swim in? A penis B scrotum C prostate gland D testis
1 marks
Answer: C
32 The graph shows a woman’s body temperature during the menstrual cycle. 37 body temperature / °C 36 menstruation 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 day On which days is the woman most likely to become pregnant? A days 0–5 B days 6–12 C days 13–18 D days 19–28
1 marks
Answer: C
30 Fertilisation is defined as the fusion of the ……X…… of two gametes to form a ……Y…… . Which row completes the sentence? X Y A alleles sex cell B alleles zygote C nuclei sex cell D nuclei zygote
1 marks
Answer: D
32 The effectiveness of different methods of birth control were studied in one country. The graph shows the results of the study. 100 80 percentage 60 effectiveness 40 20 0 condom contraceptive injection contraceptive pill femidom monitoring body temperature vasectomy method of birth control Which type of birth control is the most effective in this study? A barrier B chemical C natural D surgical
1 marks
Answer: D
31 What is the name of the ball of cells that forms soon after fertilisation in humans? A embryo B ovum C placenta D fetus
1 marks
Answer: A
32 The diagram shows the inheritance of sex in humans. male gametes X Y female X XX XY gametes X XX XY A man and a woman have one female child. What is the chance of the couple’s next child being female? A 25% B 50% C 75% D 100%
1 marks
Answer: B
32 The diagrams show four methods of birth control. MON TUE WED THU FRI & SAT » SUN SUN “SAT < FRI ~THU «WED TUE «Non? Y ORAL CONTRACEPTIVE TABLETS MON® TUE WED THU ® FRI & SAT & SUN SUN “SAT —1 FRI THU «WED~«TUE =NoN WHEN THIS PACK IS EMPTY START A NEW ONE IMMEDIATELY not to scale What are barrier methods of birth control? —s 0 0O WwW > «~ «eM Ke & KS & << [0 x Kx QS \ & & [a key v= yes X =no
1 marks
Answer: C
32 In a sperm cell, which structure contains enzymes that can digest the jelly coat of an egg cell? A acrosome B flagellum C mitochondria D nucleus
1 marks
Answer: A
31 The diagram shows some stages in reproduction. female structure M egg which releases eggs cell process cell Q P male structure N sperm which releases sperm cell Which letter correctly identifies the structure or process? A M is the oviduct. B N is the sperm duct. C P is fertilisation. D Q is the gamete.
1 marks
Answer: C
32 Which part of the female reproductive system releases egg cells? A cervix B ovary C oviduct D uterus
1 marks
Answer: B
33 Which adaptive feature of sperm provides the energy that enables it to swim? A the acrosome B the cell membrane C the flagellum D the mitochondria
1 marks
Answer: D
30 What is the function of the acrosome in a sperm cell? A The acrosome contains enzymes that digest the jelly coat of an egg cell. B The acrosome is needed for the sperm cell to move. C The acrosome releases energy. D The acrosome stores genetic information.
1 marks
Answer: A
31 Which diagram shows fertilisation? A B key female gamete C D male gamete nucleus
1 marks
Answer: C
32 What is a flagellum? A a ball of cells that implants into the lining of the uterus B a cell structure that releases energy C a cell that forms after the sperm cell fuses with the egg cell D an adaptive feature used for movement of sperm cells
1 marks
Answer: D
33 Which word describes a fertilised cell? A acrosome B embryo C gamete D zygote
1 marks
Answer: D
30 What happens to the uterus lining at the start of the menstrual cycle? A The uterus lining breaks down. B The uterus lining grows new blood vessels. C An embryo implants in the uterus lining. D The uterus lining repairs and thickens.
1 marks
Answer: A
26 The diagram shows a sperm cell. Which part contains digestive enzymes? A B C D
1 marks
Answer: D
28 The diagram shows a human menstrual cycle. day 0 X day 21 Z day 7 Y day 14 What are represented by X, Y and Z? the lining of the uterus an ovary releases a thick uterus lining is breaking down an egg is maintained A X Y Z B X Z Y C Z Y X D Z X Y
1 marks
Answer: A
25 The diagram shows the human female reproductive system. Where does fertilisation normally take place? A B C D
1 marks
Answer: A
26 The diagram shows a developing fetus. capillaries in the X mother’s blood uterus lining developing fetus Which structure is represented by X? A amniotic sac B cervix C placenta D umbilical cord
1 marks
Answer: C