Biology IGCSE

What is the function of the nucleus in a cell?

• The function of the nucleus in a cell is to transport nutrients.

• The function of the nucleus in a cell is to provide structural support.

• The function of the nucleus in a cell is to control gene expression and store DNA.

• The function of the nucleus in a cell is to produce energy.

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What is the difference between mitosis and meiosis?

• Mitosis results in two identical daughter cells, while meiosis results in four non-identical daughter cells.

• Mitosis results in four identical daughter cells, while meiosis results in two non-identical daughter cells.

• Mitosis and meiosis both result in two identical daughter cells.

• Mitosis and meiosis both result in four non-identical daughter cells.

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Explain the process of natural selection in ecology.

• Natural selection is the process of random mutations occurring in a population.

• Natural selection is the process by which certain traits or characteristics become more or less common in a population over time.

• Natural selection is the process of humans selecting which traits or characteristics they want in a population.

• Natural selection is the process of individuals choosing their own traits or characteristics.

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What are the reactants and products of photosynthesis?

• Carbon dioxide, water, glucose, oxygen

• Sunlight, oxygen, glucose, water

• Oxygen, glucose, water, carbon dioxide

• Carbon dioxide, water, glucose, nitrogen

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Describe the role of mitochondria in cellular respiration.

• Mitochondria store ATP in cellular respiration.

• Mitochondria break down ATP in cellular respiration.

• Mitochondria have no role in cellular respiration.

• Mitochondria produce ATP through cellular respiration.

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What are the main components of a cell membrane?

• proteins, carbohydrates, and nucleic acids

• lipids, carbohydrates, and nucleic acids

• phospholipids, proteins, and nucleic acids

• phospholipids, proteins, and cholesterol

What is the purpose of Punnett squares in genetics?

• To predict the possible outcomes of genetic crosses.

• To identify the genetic disorders in an individual.

• To study the inheritance patterns of specific traits.

• To determine the dominant and recessive traits in an organism.

Explain the concept of food chains in an ecosystem.

• Food chains in an ecosystem represent the competition between different species for resources.

• Food chains in an ecosystem represent the hierarchy of organisms based on their size.

• Food chains in an ecosystem represent the migration patterns of animals.

• Food chains in an ecosystem represent the flow of energy and nutrients from one organism to another.

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What is the equation for aerobic respiration?

• glucose + oxygen -> carbon dioxide + water + energy (AMP)

• glucose + oxygen -> carbon dioxide + water + energy (ATP)

• glucose + oxygen -> carbon dioxide + water + energy (NADP)

• glucose + oxygen -> carbon dioxide + water + energy (ADP)

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How does DNA determine the traits of an organism?

• DNA determines the traits of an organism through the interaction with the environment.

• DNA determines the traits of an organism through random mutations.

• DNA determines the traits of an organism through the influence of the organism's diet.

• DNA contains the genetic information that codes for the production of proteins, which determine the traits of an organism.

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