Sexual reproduction in humans — Paper 2 · IGCSE Biology (9-1) 0970

30 What is a function of the mitochondria in a sperm cell? A penetrating the surface of the egg cell B propelling the sperm towards the egg C storing food energy D supplying the energy for movement

1 marks

Answer: D

This question in 0970/21 May/June 2018

27 What are two adaptive features of a human sperm cell? 1 jelly coat present 2 relatively high number of mitochondria 3 acrosome present 4 relatively high energy stores A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

1 marks

Answer: C

This question in 0970/22 Oct/Nov 2018

29 What is a possible disadvantage of in vitro fertilisation (IVF)? A Donated eggs and sperm can be used. B Embryos can be screened for genetic disorders. C It requires more medical resources. D Unused embryos can be stored.

1 marks

Answer: C

This question in 0970/22 Oct/Nov 2018

30 A sperm cell from a domestic cat contains 19 chromosomes. If this cell fertilises an egg, which zygote is produced? A diploid, with 19 chromosomes B diploid, with 38 chromosomes C haploid, with 19 chromosomes D haploid, with 38 chromosomes

1 marks

Answer: B

This question in 0970/22 Oct/Nov 2018

30 Which feature allows the sperm to dissolve the jelly coating of the egg cell? A acrosome B flagellum C mitochondria D nucleus

1 marks

Answer: A

This question in 0970/21 May/June 2019

30 Which feature allows the sperm to dissolve the jelly coating of the egg cell? A acrosome B flagellum C mitochondria D nucleus

1 marks

Answer: A

This question in 0970/22 May/June 2019

28 In humans, why are sperm cells produced in much greater numbers than egg cells? A Many sperm cells are needed to fertilise an egg cell. B Sperm cells are small in size. C Sperm cells are non-motile. D The chance of one sperm cell reaching an egg is very small.

1 marks

Answer: D

This question in 0970/22 Oct/Nov 2019

30 The diagram shows the cells of a mammalian embryo shortly after fertilisation. Which is the correct description of these cells? A gametes undergoing meiosis B gametes undergoing mitosis C stem cells undergoing meiosis D stem cells undergoing mitosis

1 marks

Answer: D

This question in 0970/22 Oct/Nov 2019

29 The diagram shows a sperm cell. Which part contains enzymes that digest the jelly coat of an egg cell? A B C D

1 marks

Answer: D

This question in 0970/21 May/June 2020

30 Which cell contains a haploid nucleus? A neurone B sperm cell C skin cell D red blood cell

1 marks

Answer: B

This question in 0970/21 May/June 2020

28 In a comparison between the processes of artificial insemination (AI) and in vitro fertilisation (IVF), which statement applies to IVF only? A Human egg cells are harvested from the ovary. B Donated sperm cells are used to fertilise the egg cells. C Childless couples are given the opportunity to have a child of their own. D Fertilisation occurs inside the body of the female.

1 marks

Answer: A

This question in 0970/22 May/June 2020

28 Which hormone is used in contraceptive pills? A insulin B LH C FSH D progesterone

1 marks

Answer: D

This question in 0970/22 Oct/Nov 2020

31 How will the composition of a pregnant woman’s blood change as it passes through the placenta? concentration of concentration of dissolved oxygen urea A decreases decreases B decreases increases C increases decreases D increases increases

1 marks

Answer: B

This question in 0970/21 May/June 2021

27 An advisor was presented with a list of statements for a discussion group with potential parents who were considering using in vitro fertilisation (IVF) to start a family. Which statements about IVF are correct? 1 IVF is available to everyone. 2 IVF is 100% successful and therefore always leads to pregnancy. 3 IVF provides an opportunity for single parents to have a family. 4 IVF is not expensive and everyone can afford it. 5 Sperm or egg donation may be involved which means the couple are not always the biological parents. A 1, 3 and 4 B 1, 2 and 4 C 2 and 5 D 3 and 5

1 marks

Answer: D

This question in 0970/21 May/June 2022

27 What is an adaptive feature of sperm? A large stores of energy B enzymes in the acrosome C jelly coating that changes after fertilisation D diploid nucleus

1 marks

Answer: B

This question in 0970/22 May/June 2022

29 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

This question in 0970/22 May/June 2023

31 The table shows the percentage of sperm with different abnormalities in samples from a person with normal fertility and two people with low fertility. person with person P with person Q with normal fertility low fertility low fertility percentage of sperm with no acrosome 2 25 2 percentage of sperm with 11 11 35 deformed flagellum percentage of sperm with 4 4 30 few mitochondria What are the causes of low fertility in person P and person Q? person P person Q A too many sperm cannot too many sperm cannot digest jelly coat of egg cell digest jelly coat of egg cell B too many sperm cannot too many sperm cannot digest jelly coat of egg cell move to oviduct C too many sperm cannot too many sperm cannot move to oviduct digest jelly coat of egg cell D too many sperm cannot too many sperm cannot move to oviduct move to oviduct

1 marks

Answer: B

This question in 0970/21 May/June 2024

30 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

This question in 0970/22 May/June 2025

26 Which statement describes the net direction of movement of a substance across the placenta? A Carbon dioxide moves from the mother’s blood to the fetus’s blood. B Glucose moves from the fetus’s blood to the mother’s blood. C Glycogen moves from the mother’s blood to the fetus’s blood. D Urea moves from the fetus’s blood to the mother’s blood.

1 marks

Answer: D

This question in 0970/22 Oct/Nov 2025

27 The diagram shows the human female reproductive system. Which label identifies the uterus? B A C D

1 marks

Answer: C

This question in 0970/22 Oct/Nov 2025