Quiz: Fundamentals of Cell Biology and Physics — 6 perguntas

Perguntas e respostas detalhadas

1. Which structure is found in a plant cell but not in an animal cell?

Nucleus
Cell membrane
Cytoplasm
Cell wall

Cell wall

Explicação

Plant cells have extra structures including a cell wall, chloroplasts, and a vacuole. Animal cells also have a cell membrane, cytoplasm, and a nucleus, so those are not plant-only.

2. What is the word equation for cell respiration?

Glucose + oxygen → carbon dioxide + water + energy
Glucose + carbon dioxide → oxygen + water
Oxygen + water → glucose + energy
Carbon dioxide + water → glucose + oxygen

Glucose + oxygen → carbon dioxide + water + energy

Explicação

Cell respiration breaks down glucose using oxygen to release energy, producing carbon dioxide and water. The other options describe photosynthesis or incorrect reactants and products.

3. What does chlorophyll do in photosynthesis?

Absorbs sunlight to power the reaction
Transports water through the plant
Releases oxygen into the soil
Stores glucose in the leaf

Absorbs sunlight to power the reaction

Explicação

Chlorophyll is the pigment that absorbs sunlight for photosynthesis. It does not store glucose, release oxygen into the soil, or transport water.

4. Which statement correctly describes a gas?

It has a fixed shape but no fixed volume
It has a fixed volume but no fixed shape
It has both a fixed shape and a fixed volume
It has no fixed shape or fixed volume

It has no fixed shape or fixed volume

Explicação

Gases do not have a fixed shape or a fixed volume. Solids have fixed shape, and liquids have fixed volume, so those options are incorrect.

5. Which pH value would indicate an alkali?

7
10
2
5

10

Explicação

Alkalis have pH values above 7. A pH of 7 is neutral, while values below 7 are acidic.

6. Which formula is used to calculate speed?

speed = energy ÷ time
speed = force ÷ distance
speed = distance ÷ time
speed = time ÷ distance

speed = distance ÷ time

Explicação

Speed is calculated by dividing distance by time. The other formulas mix in unrelated quantities or reverse the correct relationship.

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Animal cell — key features?

Nucleus, cytoplasm, membrane, mitochondria.

Plant cell — extra structures?

Cell wall, chloroplasts, vacuole.

Mitochondria — role?

Releases energy during respiration.

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