U3L1 - Lecture Presentation - Photosynthesis

Multiple Choice

The process of photosynthesis can be represented by the chemical formula...

• • C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + energy

• • C6H12O6 + 6H20 → 6CO2 + 6H2O

• • 6CO₂ +6H₂O → C₆H₁₂O₆ + 6O₂

• • 6CO₂ + H₂O → C₆H₁₂O₆ + 6O₂

Multiple Select

[B-LS1-5] Photosynthesis 1 - Recall

Energy + 6CO₂ + 6H₂O → 6O₂ + C₆H₁₂O₆

This is the chemical reaction that occurs during photosynthesis; identify which of these are products in this chemical reaction.

• • water

• • oxygen

• • glucose

• • carbon dioxide

Multiple Choice

[B-LS1-5] Photosynthesis1 - Recall

Energy + 6CO₂ + 6H₂O → 6O₂ + C₆H₁₂O₆

During photosynthesis, sugar C₆H₁₂O₆ is produced from carbon dioxide, water, and sunlight. Which statement BEST explains what happens during photosynthesis?

• • Atoms are gained when sugar is formed.

• • Single atoms are converted into molecules .

• • Atoms from compounds are lost when sugar is formed.

• • Atoms of compounds are rearranged to form new compounds.

Multiple Choice

[B-LS1-5] Photosynthesis 3 - Strategic Thinking

During the light-dependent reactions of photosynthesis, we would expect what compound(s) to be produced?

• • glucose

• • ATP and NADPH

• • water and NADPH

• • glucose and oxygen

Multiple Choice

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.

Multiple Choice

[B-LS1-5] Photosynthesis 2 - Skill/Concept

William is testing what type of light best helps bean plants grow. He plants four beans in four separate pots. He places each pot in a different room and subjects them to different types of light, and he waters each plant the same amount. He uses sunlight, ultraviolet, fluorescent, and black light. William then measures the height and growth rate of each plant.

Which light source is part of the control group for William’s experiment?

• • sunlight

• • ultraviolet

• • fluorescent

• • black light

Multiple Choice

[B-LS1-5] Photosynthesis2 - Skill/Concept

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.

Multiple Choice

• During the second set of photosynthetic reactions, called the Calvin cycle, all BUT ONE of the following occurs.

• • Glucose is the end product of the Calvin cycle.

• • By-products of the Calvin cycle include water vapor and oxygen.

• • Carbon dioxide, a reactant of photosynthesis, is utilized during the Calvin cycle.

• • ATP and NADPH, high energy molecules, are utilized to produce stored chemical energy.

Labelling

Label the image

Drag labels to their correct position on the image

Light + H₂O

ADP + NADP⁺

CO₂

ATP + NADPH

C₆H₁₂O₆

O₂

Multiple Choice

[B-LS1-5] Photosynthesis2 - Skill/Concept

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.

Multiple Choice

[B-LS1-5] Photosynthesis 3 - Strategic Thinking

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.

Multiple Choice

[B-LS1-5] Photosynthesis 2 - Skill/Concept

According to the table, what is the optimum temperature for the production of glucose in plants?

• • 10 degrees Celsius

• • 30 degrees Celsius

• • 20 degrees Celsius

• • 35 degrees Celsius