What does the first law of thermodynamics state?

Energy can only be transformed or converted from one form to another.

Energy can be created and destroyed.

Energy transformation is 100% efficient.

In a chemical equation, where are the reactants typically written?

On the left side of the equation

On the right side of the equation

What are the three criteria used to classify chemical reactions?

Changes in chemical structure, changes in chemical energy, and whether the reaction is irreversible or reversible

Changes in chemical structure, changes in chemical energy, and whether the reaction is endothermic or exothermic

Changes in chemical structure, changes in physical state, and whether the reaction is fast or slow

Changes in chemical structure, changes in temperature, and whether the reaction is spontaneous or non-spontaneous

What is a decomposition reaction?

A reaction where large molecules are broken down into smaller ones

A reaction where small molecules combine to form larger ones

A reaction where molecules exchange electrons

A reaction where energy is absorbed

What happens in an exergonic reaction?

Energy is released at the end of the reaction

Energy is absorbed at the start of the reaction

Energy is stored in chemical bonds

Energy is required for the reaction to proceed

How are chemical reactions classified based on energy?

As spontaneous or non-spontaneous

What is the difference between reversible and irreversible reactions?

Reversible reactions proceed in both directions, while irreversible reactions proceed in one direction

Reversible reactions only proceed in one direction

Irreversible reactions proceed in both directions

Irreversible reactions can become reversible under certain conditions

What is the reaction rate a measure of?

The speed at which a chemical reaction takes place

The amount of product formed in a reaction

The temperature at which a reaction occurs

What is the primary factor that determines the reaction rate of a chemical reaction?

The energy required to break chemical bonds

The temperature of the environment

What is activation energy?

The energy required to break existing chemical bonds

The energy released during a reaction

The energy stored in chemical bonds

The energy used to form new bonds

How do enzymes facilitate chemical reactions?

By decreasing the activation energy

What is the role of the active site in an enzyme?

To bind to substrates and catalyze specific reactions

What happens in step two of enzymatic action?

The enzyme changes shape for a closer fit

The substrate enters the active site

The enzyme releases the product

What is the function of enzyme inhibitors?

To enhance substrate concentration

How does a competitive inhibitor affect an enzyme?

It competes with the substrate for the active site

It permanently deactivates the enzyme

What is a metabolic pathway?

A series of enzymatic reactions

What is produced during the sixth and seventh steps of glycolysis?

Two molecules of ATP and two molecules of NADH

Two molecules of pyruvate and two molecules of water

Two molecules of glucose and two molecules of oxygen

Two molecules of carbon dioxide and two molecules of water

What role does ATP play in the regulation of glycolysis?

It acts as an allosteric inhibitor for phosphofructokinase

It acts as an activator for phosphofructokinase

It acts as a substrate for phosphofructokinase

It acts as a product of phosphofructokinase

What happens to pyruvate if sufficient oxygen is not available?

It enters the citric acid cycle

What happens to glucose during glycolysis?

It is split into two molecules of glyceraldehyde 3-phosphate.

It is split into three molecules of pyruvate.

It is converted into one molecule of acetyl CoA.

It is converted into two molecules of lactate.

What is the role of oxaloacetic acid in the citric acid cycle?

It is used to form citrate and regenerated at the end of the cycle.

It is converted into acetyl CoA.

It is broken down into carbon dioxide and water.

It is used to produce ATP directly.

BIO2250-01N F25: Chapter 3

University

•

61 Qs

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BIO2250-01N F25: Chapter 3

Quiz

•

Science

•

University

•

Practice Problem

•

Hard

•

NGSS

HS-LS1-7, HS-LS2-3, HS-PS1-4

+11

Standards-aligned

Begona Perez-Mira

FREE Resource

61 questions

Show all answers

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the two states of energy mentioned in the document?

Chemical energy and thermal energy

Potential energy and kinetic energy

Electrical energy and nuclear energy

Light energy and sound energy

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which type of energy is described as the energy of motion?

Potential energy

Chemical energy

Kinetic energy

Thermal energy

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is an example of potential energy in the human body?

Movement of Na+ into the cell

Position of electrons in electron shells

Heat produced by muscles

Light absorbed by the eyes

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which molecules are involved in long-term energy storage in the human body?

Proteins and carbohydrates

Triglycerides and glucose

Triglycerides and adenosine triphosphate (ATP)

Glucose and nucleic acids

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Where is glucose stored in the human body?

In the blood and kidneys

In the liver and muscle tissue

In the brain and heart

In the skin and bones

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is ATP's role in cells?

It stores energy in large amounts for future use.

It is produced continuously and used immediately for energy-requiring processes.

It is a waste product of cellular respiration.

It is only used in muscle cells.

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-3

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is an example of mechanical energy?

Movement of charged particles

Muscle contraction

Compression of molecules in a gas

Electromagnetic waves

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

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BIO2250-01N F25: Chapter 3

61 questions

What are the two states of energy mentioned in the document?

Which type of energy is described as the energy of motion?

What is an example of potential energy in the human body?

Which molecules are involved in long-term energy storage in the human body?

Where is glucose stored in the human body?

What is ATP's role in cells?

Which of the following is an example of mechanical energy?

What does the first law of thermodynamics state?

What is the collective term for all chemical reactions in living organisms?

In a chemical equation, where are the reactants typically written?

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