Unit 4 Final Review

What is the major goal of cellular respiration?

• Reduce NAD+

• Supply cell with fixed carbon

• Produce ATP

• Generate O2

The diagram summarizes a series of chemical reactions that occur in cells. Which process do these reactions represent?

• Photosynthesis

• Glycolysis

• Aerobic Respiration

• Anaerobic Respiration

What is the major goal of cellular respiration?

• Reduce NAD+

• Supply cell with fixed carbon

• Produce ATP

• Generate O2

Plants perform photosynthesis by using the energy of __________ to power production of sugars from __________ and __________ molecules.

• Organic molecules; Oxygen; Water

• Organic molecules; Carbon dioxide; Water

• Sunlight; Oxygen; Water

• Sunlight; Carbon dioxide; Water

Photosynthesis is an important chemical reaction for life on Earth, as it is the primary source of food energy for almost all living things. What chemical is responsible for capturing solar radiation and converting it to food?

• Glucose

• ATP

• Chlorophyll

• Nitrogen

In which of the following ways are photosynthesis and cellular respiration alike?

• Both processes produce glucose.

• Both processes consume carbon dioxide.

• Both processes take place in chloroplasts.

• Both processes involve energy transformations.

Which gas is associated with increases in average global temperatures?

• Carbon dioxide

• Helium

• Nitrogen

• Oxygen

Which statement accurately describes the greenhouse effect?

• The greenhouse effect is bad and is the main cause of global warming.

• The greenhouse effect is good and has no connection to global warming.

• The greenhouse effect is necessary because it warms up our atmosphere, but it can cause global warming if there are to many greenhouse gases in the environment.

• Greenhouse gases have no impact on global temperatures.

Scientists are investigating the cause of the large increase in atmospheric carbon dioxide concentration since about 1800. Which of the following provides the best explanation for the increase?

• Eruptions of large volcanoes

• Use of fossil fuels by humans

• Natural fluctuations of climate

• Photosynthesis by phytoplankton

Which of the following explains why elements, such as carbon and oxygen, that are used in organic molecules are not permanently removed from the environment?

• They are replenished by sunlight.

• They are cycled through ecosystems.

• They are replaced by volcanic eruptions.

• They are produced constantly from nutrients.