Cell Respiration Photosynthesis Cell Structure and Transport

How do photosynthesis and cellular respiration differ?

• Photosynthesis uses food and cellular respiration produces food.
• Photosynthesis gives off oxygen and cellular respiration uses oxygen.
• Photosynthesis uses oxygen and cellular respiration uses carbondioxide.
• Photosynthesis breaks down carbohydrates and cellular respirationproduces carbohydrates.

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Which plant cell structures capture sunlight to produce sugars?

• vacuoles
• ribosomes
• mitochondria
• chloroplasts

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What is the chemical equation (formula) for photosynthesis?

• 6CO₂ + 6H₂O + light energy → C₆H₁₂O₆ + 6O₂
• 6CO₆ + 6H₂O + light energy → C₆H₁₂O₆ + 6O₂
• 6CO₂ + 6H₂O + light energy → C₆H₁₂O₆ + 6O₂
• 6CO₂ + 6H₂O + light energy → C₆H₁₂O₆ + 6O₆

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The maintenance of homeostasis in animals is most directly related to which?

• recombination of chromosomes during meiosis
• percentage of protein molecules in the organism
• growth and development of the organism
• use and production of energy

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Which is an example of a cell maintaining homeostasis?

• A cell moves away from a toxin
• A cell dies due to lack of food
• A cancer cell grows back in the same spot
• DNA mutates and different proteins are made

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Which statement best explains why a person shivers when he or she is cold?

• Shivering allows for loss of heat through diffusion
• Shivering warms the body, helping to maintain homeostasis
• Shivering rids the body of toxins by expelling them through the skin
• Shivering forces the lungs to breathe faster and deeper to bring in more oxygen

Which best signals that equilibrium has been reached across a selectively permeable membrane?

• The movement of water across the membrane is balanced.
• The movement of dissolved particles across the membrane begins.
• The movement of water across the membrane stops.
• The membrane will begin to allow all substances to pass through.

Why are contractile vacuoles important to unicellular organisms like paramecia?

• They help the cell move.
• They excrete wastes.
• They respond to external stimuli.
• They maintain homeostasis.

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______________ is the pigment that absorbs sunlight.

• Mitochondria
• Chlorophyll
• Stomata
• Cell wall

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Which organelle would a protist need for phototaxis?

• pseudopod
• contractile vacuole
• cilium
• eyespot