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KCSE Biology Practice

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Question 1

What is the primary function of the mitochondria in a cell?

Cell structure and functionCell structure and functioneasy

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Question 2

Which of the following best describes the role of the cell membrane in transport?

Transport across membranesTransport across membraneseasy

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Question 3

During mitosis, which phase is characterized by chromosomes lining up at the equator of the cell?

Cell division: mitosis and meiosisCell division: mitosis and meiosismedium

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Question 4

Which pigment primarily absorbs light energy during photosynthesis?

Photosynthesis and respirationPhotosynthesis and respirationeasy

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Question 5

What is the role of enzymes in biological reactions?

Enzyme function and controlEnzyme function and controleasy

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Question 6

Which nutrient is primarily absorbed in the small intestine?

Digestion and absorptionDigestion and absorptionmedium

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Question 7

Which blood vessel carries oxygenated blood from the lungs to the heart?

Transport in plants and animalsTransport in animalseasy

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Question 8

Which organ is primarily responsible for excretion of nitrogenous waste in humans?

Excretion and osmoregulationExcretion and osmoregulationeasy

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Question 9

How does the nervous system differ from the endocrine system?

Nervous and endocrine systemsNervous and endocrine systemsmedium

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Question 10

Which method of reproduction results in genetically identical offspring?

Reproduction in plants and animalsReproduction in plants and animalseasy

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Question 11

What is the main growth substance in plants responsible for cell elongation?

Growth and developmentGrowth and developmentmedium

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Question 12

Which type of inheritance involves multiple genes contributing to a single trait?

Heredity and variationHeredity and variationhard

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Question 13

Which process leads to the formation of new species over time?

EvolutionEvolutionmedium

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Question 14

What term describes a group of organisms of the same species living in the same area?

Ecology: populations, communities, ecosystemsEcology: populations, communities, ecosystemseasy

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Question 15

Which practice helps to conserve biodiversity?

BiodiversityBiodiversitymedium

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Question 16

How does active immunity differ from passive immunity?

ImmunityImmunitymedium

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