Photosynthesis Quiz

During winter, what factors can reduce the rate of photosynthesis in evergreens such as pine trees? Choose ALL that apply.

• less sunlight

• colder temperatures

• more water availability

• increased oxygen availability

• decreased carbon availability

In an experiment two potted plants, labeled Plant 1 and Plant 2, are placed in transparent plastic bags and left in the open. Sodium hydrogen carbonate is added to the bag covering Plant 1. This compound decomposes slowly to produce carbon dioxide. Soda lime is added to the bag covering Plant 2. This compound absorbs carbon dioxide. Both plants are watered regularly with the same amount of water. After several days, starch test results indicate starch in leaf 1 but an absence of starch in leaf 2. This experimental data confirms the

• role of water in photosynthesis.

• role of sunlight in photosynthesis.

• role of nutrients in photosynthesis.

• role of carbon dioxide in photosynthesis.

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.

• Chlorophyll stores carbon dioxide for photosynthesis.

• Chlorophyll stores glucose made in photosynthesis.

• Chlorophyll stores oxygen made in photosynthesis.

During a summer drought, what can we expect to happen to these strawberry plants?

• They will become extinct.

• There will be less sugar produced.

• There will be an excess of oxygen produced.

• The plant will require more carbon dioxide to make sugar.

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

• the roots are visible in the model.

• the cellular structure of the plant is not included.

• the comparative size of the plant and the Sun are inaccurate.

• it is incomplete and does not show all reactants and products.

What elements are rearranged to make glucose in plants?

• water and oxygen

• carbon, hydrogen, and oxygen

• carbon dioxide and sunlight

• carbon, oxygen, and solar energy

Your teacher asked you to explain the photosynthesis model to a new student. Examine the model and determine what you should include in your explanation. Choose ALL that apply.

• Plants get water from the soil from their roots.

• Plants require sunlight, water, and carbon dioxide to make sugars.

• Plants absorb water, oxygen, and carbon dioxide through their leaves.

• Plants bring in carbon dioxide and release oxygen through their leaves.

• Plants bring in oxygen and release carbon dioxide through the stomata in their leaves.

Examine the model. How could you correctly label the products and reactants of photosynthesis? Select ALL that apply.

• A = water

• B = oxygen

• C = sunlight

• D = carbon dioxide

• E = glucose

Using the graphic provided, identify the reactants of photosynthesis.

• sunlight, oxygen, water

• sugar (glucose), oxygen

• sunlight, water, glucose

• sunlight, carbon dioxide, water

Given two areas with equal sunlight and available water. Area I has a high amount of atmospheric carbon dioxide while Area II has a low amount of atmospheric carbon dioxide. How does the rate of photosynthesis in Area I compare to that in Area II?

• Atmospheric carbon dioxide has no affect on the rate of photosynthesis.

• The rate of photosynthesis increases with a decrease in carbon dioxide.

• The rate of photosynthesis increases with an increase in carbon dioxide.

• The level of carbon dioxide increases with the level of available oxygen.