Matter & Energy: Organization in Living Systems

Photosynthesis and cellular respiration are both a series of chemical processes, catalyzed by a large number of enzymes which are part of a....

• Sensory pathway

• Metabolic pathway

• Respiratory pathway

• Circulatory pathway

From where do animals get most of their energy?

• Genes

• Enzymes

• Vitamins

• Food

What drives the photosynthesis reaction in plants?

• Nutrient energy

• Light energy

• Animal energy

• Mineral energy

What is the "photocenter" molecule that absorbs photons of light in plants and releases electrons?

• Substrates

• Thylakoid

• Chlorophyll

• Activation site

In an enzyme-catalyzed reaction, what is the molecule altered by the reaction?

• The active site

• The catalyst

• The thylakoid

• The substrate

Enzymes can catalyze only endergonic reactions.

• False

• True

In the glycolysis pathway, what is one molecule of glucose converted into?

• 2 molecules each of carbon dioxide and ATP

• 2 molecules each of pyruvate and ATP

• 2 molecules each of carbon dioxide and ADP

• 2 molecules each of pyruvate and ADP

What do we ultimately transform the carbohydrates, lipids and proteins that we consume into

• Vitamins

• ATP

• Enzymes

• Minerals

Which of the following best describes ATP?

• It is a molecule that only photosynthesis produces

• It is the primary molecule in which cells store and use energy

• It is a molecule that only herbivores produce

• It is the primary molecule in which cells carry out enzyme reactions

What do exergonic reactions do?

• Break down complex molecules and release energy

• Break down complex molecules and require energy

• Build complex molecules and release energy

• Build complex molecules and require energy