Lesson 3.2.1
3.2.1 Specialised mammalian gametes and fertilisation Quiz: Pearson Edexcel Biology, Unit 3
20 questions
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Lesson 3.2.1, Specialised mammalian gametes and fertilisation: 20 multiple choice questions for the Pearson Edexcel Biology (9BI0), Unit 3: Voice of the Genome, written with Revision Ninja.
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The 20 questions
-
What is the primary function of the acrosome in a sperm cell?
- Provides ATP energy
- Hardens zona pellucida
- Stores genetic material
- Releases digestive enzymes
-
What is the outer glycoprotein layer surrounding a mammalian egg cell called?
- Cortical granule
- Corona radiata
- Plasma membrane
- Zona pellucida
-
Which organelle in the sperm midpiece provides the energy for movement?
- Lysosomes
- Nucleus
- Mitochondria
- Acrosome
-
What is the primary purpose of the cortical reaction in fertilisation?
- Prevents polyspermy
- Digests zona pellucida
- Attracts sperm cells
- Triggers meiotic division
-
Why is an egg cell much larger than a sperm cell?
- Has multiple nuclei
- Contains flagella
- Contains food reserves
- Lacks a membrane
-
Which process occurs first when a sperm reaches the zona pellucida?
- Acrosome reaction
- Nuclear fusion
- Cortical reaction
- Cell cleavage
-
What enters the egg cytoplasm immediately after plasma membrane fusion?
- Acrosome vesicle
- Sperm mitochondria
- Zona pellucida
- Sperm nucleus
-
Which reaction hardens the zona pellucida to prevent polyspermy in mammals?
- Acrosome reaction
- Cortical cleavage
- Cortical reaction
- Capacitation reaction
-
How many chromosomes does a human sperm carry?
- 92
- 23
- 46
- 22
-
A somatic cell in a man has 46 chromosomes. How many chromosomes are in one of his sperm?
- 46
- 92
- 23
- 12
-
Which glycoproteins on the zona pellucida bind sperm receptors to ensure species specificity?
- Hyaluronidase enzymes
- ZP3 glycoproteins
- ZP1 glycoproteins
- Acrosin receptors
-
What happens to the zona pellucida immediately following the cortical reaction?
- It thickens
- It dissolves
- It hardens
- It ruptures
-
Why are mammalian sperm produced in extremely large numbers?
- Most are lost
- To produce twins
- To nourish eggs
- They are tiny
-
Which structure cannot be digested if a sperm lacks a functional acrosome?
- Zona pellucida
- Corona radiata
- Follicle cell
- Plasma membrane
-
What is the ploidy level of the zygote formed at fertilisation?
- Diploid
- Aneuploid
- Triploid
- Haploid
-
Where in the human female reproductive tract does fertilisation usually occur?
- Cervix
- Uterus
- Oviduct
- Ovary
-
Which process allows the sperm nucleus to enter the cytoplasm of the egg?
- Exocytosis
- Membrane fusion
- Endocytosis
- Active transport
-
Which type of nuclear division occurs in the zygote immediately after fertilisation?
- Mitosis
- Meiosis I
- Meiosis II
- Binary fission
-
What describes the nuclear ploidy of both human sperm and egg cells?
- Polyploid
- Aneuploid
- Diploid
- Haploid
-
Which molecule is generated by mitochondria in the sperm midpiece to power movement?
- Pyruvate
- Lactate
- Glucose
- ATP
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