Enzymes and ATP Quiz

What is the term for the sum of all chemical reactions in a living organism?

• Photosynthesis

• Metabolism

• Cellular Respiration

• Denaturation

Answer explanation

Metabolism refers to the sum of all chemical reactions in a living organism, including processes like photosynthesis and cellular respiration. It encompasses all the biochemical activities that sustain life.

Tags

NGSS.HS-LS2-3

Which term describes the starting materials in a chemical reaction?

• Products

• Enzymes

• Reactants

• Substrate

Answer explanation

In a chemical reaction, the starting materials are called reactants. They undergo transformation to form products. Therefore, the correct term for the starting materials is reactants.

Which process involves the conversion of light energy into chemical energy?

• Cellular Respiration

• Photosynthesis

• Metabolism

• Denaturation

Answer explanation

Photosynthesis is the process where plants convert light energy into chemical energy, specifically in the form of glucose, using sunlight, carbon dioxide, and water. This distinguishes it from cellular respiration and other processes.

Tags

NGSS.HS-LS1-5

What is the term for the substances formed as a result of a chemical reaction?

• Reactants

• Enzymes

• Products

• Substrate

Answer explanation

In a chemical reaction, the substances that are formed as a result are called products. Reactants are the starting materials, while enzymes and substrates are related to the reaction process but do not refer to the end substances.

Which type of reaction absorbs energy from its surroundings?

• Exothermic

• Endothermic

• Photosynthesis

• Cellular Respiration

Answer explanation

An endothermic reaction absorbs energy from its surroundings, resulting in a decrease in temperature of the environment. In contrast, exothermic reactions release energy. Photosynthesis is a specific endothermic process.

Tags

NGSS.HS-PS1-4

What is the role of enzymes in biochemical reactions?

• They act as reactants

• They increase the activation energy

• They speed up reactions

• They are products of reactions

Answer explanation

Enzymes are biological catalysts that speed up biochemical reactions by lowering the activation energy required for the reaction to occur, making them essential for various metabolic processes.

What is the term for the specific region of an enzyme where a substrate binds?

• Active Site

• Denaturation

• Metabolism

• Chemical Reaction

Answer explanation

The specific region of an enzyme where a substrate binds is called the Active Site. This site is crucial for the enzyme's function, as it facilitates the chemical reaction by lowering the activation energy.

Which process breaks down glucose to release energy?

• Photosynthesis

• Cellular Respiration

• Metabolism

• Denaturation

Answer explanation

Cellular respiration is the process that breaks down glucose to release energy, which is essential for cellular functions. In contrast, photosynthesis produces glucose, while metabolism encompasses all biochemical processes, and denaturation refers to protein structure changes.

Tags

NGSS.HS-LS1-7

What happens to an enzyme when it is denatured?

• It speeds up

• It changes shape

• It becomes a substrate

• It releases energy

Answer explanation

When an enzyme is denatured, it changes shape, which affects its ability to catalyze reactions. This alteration in structure can result from factors like temperature or pH changes, rendering the enzyme inactive.

What is the term for the molecule that an enzyme acts upon?

• Product

• Reactant

• Substrate

• Active Site

Answer explanation

The term for the molecule that an enzyme acts upon is 'substrate'. Enzymes bind to substrates at their active sites to facilitate chemical reactions, converting substrates into products.