Photosynthesis and Cellular Respiration

Katie is making a model to illustrate the functions of ADP and ATP in photosynthesis. Which model best illustrates the role of ATP in photosynthesis?

• A power plant that generates energy

• A rechargeable battery that stores and releases energy

• A pigment that receives the energy of sunlight

• A pan that carries coal

Tags

NGSS.HS-LS1-5

During photosynthesis, how is the light energy that strikes the cell transformed into the chemical energy stored in sugars?

• Energy is transferred directly to sugars, with no intermediates.

• Energy is transferred to sugars through intermediates such as H2O, O2, and CO2

• Energy is transferred to sugars by using the energy stored in ATP and NADPH.

• Energy is transferred to sugars through intermediates, such as chloroplasts.

Tags

NGSS.HS-LS1-5

Which statement accurately describes the role of the light-independent reactions?

• Transforming light energy into chemical energy

• Transferring chemical energy to high-energy sugars

• Returning chemical energy to light energy

• Transferring light energy among different compounds

Tags

NGSS.HS-LS1-5

Which of the following describe the role of photosynthesis in the carbon cycle?

• Storage of carbon in the geosphere

• Transfer of carbon from the hydrosphere to the atmosphere

• Transfer of carbon from the atmosphere to the hydrosphere

• Transfer of carbon from the atmosphere to the biosphere

Photosynthesis converts light energy to stored chemical energy. What best describes the role of molecular oxygen (O₂) in this process?

• An essential reactant that is used to make sugars

• An optional reactant; its presence speeds up the process

• The main product that stores chemical energy for use by the organism

• A byproduct (waste) that is released into the atmosphere

What best describes the role of water molecules in photosynthesis?

• Water molecules are a structural component of chloroplasts; they absorb light and pass the energy to chlorophyll.

• Water molecules are an intermediate of photosynthesis, and are part of the electron transport chain.

• Water molecules are an input of photosynthesis; they split apart to create ATP and NADPH

• Water molecules are an output of photosynthesis; they are released at the end of the electron transport chain.

The diagram, when labels are added, shows the reactants and energy source for photosynthesis, and one of its products. The diagram also shows interactions among the biosphere, atmosphere, and hydrosphere. Where would a label for oxygen be MOST useful to add to the diagram?

• On the arrows pointing into the leaves

• On the arrows pointing out of the leaves

• On the arrows pointing into the roots

• On a line pointing to the interior of the stem

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

In a model summarizing cellular respiration, which of the following must be represented as raw materials, or the reactants of the process?

• Glucose and carbon dioxide

• Glucose and oxygen

• Carbon dioxide and oxygen

• Oxygen and lactic acid

Tags

NGSS.HS-LS1-7

The diagram shows a model of glycolysis. What are the products of glycolysis?

• Pyruvic acid, NADPH, CO₂

• Pyruvic acid, NADH, ATP

• Pyruvic acid, NADPH, CO₂

• Pyruvic acid, FADH2, ATP

Tags

NGSS.HS-LS1-7

What best describes the role of molecular oxygen (O₂) in cellular respiration?

• It accepts electrons to form water.

• It combines with carbon and hydrogen to form glucose.

• It is released when water breaks apart.

• It is released when glucose breaks apart.