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Chloroplasts are concentrated in the palisade mesophyll. Chloroplasts are the site of photosynthesis and contain chlorophyll which is important for making glucose in photosynthesis. How do plants use chlorophyll in photosynthesis?

• Chlorophyll absorbs sunlight energy for photosynthesis.

• Plants use chlorophyll to store energy in the form of starch.
• Chlorophyll helps plants to release oxygen during respiration.
• Plants use chlorophyll to absorb nutrients from the soil.

This is a model to help students understand the process of photosynthesis, which allows plants to create their own food. The GREATEST limitation of this model is that

• It ignores the role of sunlight in photosynthesis.
• It accurately represents all biochemical processes.
• It suggests that plants do not need water for photosynthesis.
• it is incomplete and does not show all reactants and products.

In any food web, plants are considered to be producers. They convert sunlight (solar energy) into usable chemical energy (glucose). When we eat plants our bodies are using that chemical energy. What elements are rearranged to make glucose in plants?

• Nitrogen, phosphorus, and sulfur are rearranged to make glucose.
• Sodium, potassium, and chlorine are rearranged to make glucose.
• carbon, hydrogen, and oxygen

• Calcium, magnesium, and iron are rearranged to make glucose.

Analyze the graph showing the rate of photosynthesis activity as a function of carbon dioxide level. Select as many of the choices below that accurately describe the shape of the graph as it relates to photosynthesis.

• The graph indicates that photosynthesis is unaffected by changes in carbon dioxide levels.
• The rate of photosynthesis continuously increases without any saturation point.
• The rate of photosynthesis increases as carbon dioxide levels increase.

• The graph shows a negative correlation throughout the entire range of carbon dioxide levels.
• There is a maximum value of photosynthesis that can be reached after a certain point.

Two energy conversion processes that occur in typical cells are shown here. Compare the two processes. Which description BEST compares the energy conversions in the processes shown?

• Equation 2 Cellular respiration and photosynthesis both convert chemical energy into ATP.

• Equation 1 Photosynthesis converts ATP into chemical energy, while cellular respiration converts light energy into glucose.

• Equation 1 is illustrating photosynthesis as solar energy is being used to convert inorganic compounds into organic compounds.

• Equation 2 Cellular respiration converts light energy into ATP, while photosynthesis converts chemical energy into glucose.

Under dehydration circumstances in the winter, stomata may close to reduce water loss for the tree. Predict what would result from the closing of stomata.

• Increased water absorption by roots.
• Enhanced growth and leaf expansion.
• Improved nutrient uptake from the soil.
• This would also stop gas exchange and further limit photosynthesis.

Yum! Strawberries are sweet to eat! The sugar in the strawberries are produced by this plant through photosynthesis. Examine the model to select the molecules that are rearranged to make the sugars.

• carbon dioxide and water

• Glucose and starch are rearranged to make sugars.
• Oxygen and nitrogen are rearranged to make sugars.
• Carbon monoxide and hydrogen are rearranged to make sugars.

Known as the “Pine Tree State,” Maine's state tree is the Eastern white pine. Consider the model. Carbon dioxide, water, and sunlight are reactants of photosynthesis and are used to produce glucose and release water as a byproduct. What advantage does the pine tree have in performing photosynthesis compared to deciduous trees such as oak or maple?

• Deciduous trees can photosynthesize more efficiently in winter than pine trees.
• Pine trees require less water than deciduous trees to perform photosynthesis.
• Pine trees do not lose their leaves and can photosynthesize all year.

• Pine trees have broader leaves that capture more sunlight than deciduous trees.

C₆H₁₂O₆ + 6O₂ → 6H₂O+ 6CO₂

When you respire, your cells are undergoing a chemical reaction. Glucose, one of the reactants, is being broken down or decomposed. What is one of the products of cellular respiration?

• O2

• C6H12O6

• CO₂

• CO

The chemical process for respiration

• releases ADP.

• releases energy.

• releases oxygen.

• releases glucose.