Exam 7: Photosynthesis: Using Light to Make Food

After reading the paragraph below, answer the questions that follow. You're conducting an experiment to determine the effect of different wavelengths of light on the absorption of carbon dioxide as an indicator of the rate of photosynthesis in aquatic ecosystems. If the rate of photosynthesis increases, the amount of carbon dioxide in the environment will decrease, and vice versa. Small aquatic plants are placed into three containers of water mixed with carbon dioxide. Container A is placed under normal sunlight, B under green light, and C under red light. The containers are observed for a 24-hour period. -Carbon dioxide absorption is an appropriate indicator of photosynthesis because

The electron transport chains of the light reactions

After reading the paragraph below, answer the questions that follow. The graph below shows records of temperature (light gray line) and CO₂ (dark gray line) over the past 1,000 years. CO₂ is recorded in parts per million (ppm). -Currently, atmospheric CO₂ levels are approximately 400 ppm. The annual mean growth rate in CO₂ is about 2 ppm/year. Assuming this trend continues, what would you predict the CO₂ level to be in 100 years?

Chlorophyll is located in ________, which are found in ________, which are concentrated in ________.

________ cells in leaves are specialized for photosynthesis.

In chloroplasts, ATP synthase

What is the name given to organisms that can make their own food and thus sustain themselves without consuming organic molecules derived from other organisms?

Sunlight is a type of ________ energy.

It has been argued that cutting old-growth forests and replacing them with plantations of young trees would help to alleviate the threat of global greenhouse warming. What important fact does this argument ignore?

Which of the following is not an expected outcome of global climate change?

Which of the following statements concerning the role of redox reactions in photosynthesis and cellular respiration is true?

Which of the following is a normal process of photosynthesis that could not occur if all reaction centers were inactivated by a toxin?

After reading the paragraph below, answer the questions that follow. The graph below shows records of temperature (light gray line) and CO₂ (dark gray line) over the past 1,000 years. CO₂ is recorded in parts per million (ppm). -If you focus on the data from the mid-1900s (indicated by the arrow)through today, the graph shows that

The addition of oxygen instead of carbon dioxide to RuBP results in

Which of the following is part of the light reaction?

CO₂ enters and O₂ escapes from a leaf via

Carbon fixation

Chlorophyll b

In a photosystem, clusters of chlorophyll a, chlorophyll b, and carotenoid pigments function most like

Which of the following molecules is a reactant of photosynthesis?