We are open Saturday and Sunday!

Call Now to Set Up Tutoring:

(888) 888-0446

AP Biology : Understand ATP coupling

Study concepts, example questions & explanations for AP Biology

Create An Account

All AP Biology Resources

10 Diagnostic Tests 419 Practice Tests Question of the Day Flashcards Learn by Concept

Example Questions

Example Question #1 : Understand Atp Coupling

Given the hydrolysis of 1 mole of $ATP: ATP+ H_{2}O-> ADP + Pi, delta G= -30.4 kJ/mol$ , which reaction could be driven by hydrolyzing 2 moles of ATP?

Possible Answers:

A+ B-> C+ D, delta G= +100 kJ/mol

A+ B-> C+ D, delta G= +31 kJ/mol

A+ B-> C+ D, delta G= -31 kJ/mol

A+ B-> C+ D, delta G= +50 kJ/mol

Correct answer:

A+ B-> C+ D, delta G= +50 kJ/mol

Explanation:

Given that the hydrolysis of 1 mole of ATP has delta G of -30.4 kJ/mol , if 2 moles of ATP are hydrolyzed, delta G= (-30.4)* 2= -60.8 kJ/mol . Reaction D has a delta G of +50 kJ/mol ; when coupled with the hydrolization of 2 moles of ATP, delta G will be -10.8 kJ/mol (-60.8 kJ/mol+ 50 kJ/mol) . As this is negative, it is indicated that this will be a spontaneous reaction, or can proceed without input of energy.

Report an Error

Example Question #2 : Understand Atp Coupling

ATP coupling describes the process through which hydrolysis of ATP can drive a __ reaction

Possible Answers:

exothermic

thermodynamically favorable

thermodynamically unfavorable

spontaneous

Correct answer:

thermodynamically unfavorable

Explanation:

ATP coupling is the process where hydrolysis of ATP (a thermodynamically favorable, negative delta G, or spontaneous reaction) is coupled with a thermodynamically unfavorable reaction (a reaction that cannot proceed without energy input).

Report an Error

Example Question #3 : Understand Atp Coupling

Which of the following is an endergonic reaction?

Possible Answers:

Cellular respiration

Na+/K+ pump

Catabolism

Hydrolysis of ATP

Correct answer:

Na+/K+ pump

Explanation:

An endergonic reaction requires input of energy; delta G will be positive. Hydrolysis of ATP, cellular respiration, and catabolism (breakdown of a large molecule) are exergonic processes. The Na+/K+ pump is endergonic, as it requires energy. This process is coupled with ATP hydrolysis to allow it to proceed.

Report an Error

Example Question #4 : Understand Atp Coupling

Which is true of an exergonic reaction?

Possible Answers:

Energy is required

Energy is released

The reaction will not occur spontaneously

The reaction will always be endothermic

Correct answer:

Energy is released

Explanation:

Exergonic reactions are reactions that release energy. Endergonic reactions are reactions that require energy to proceed. Exergonic reactions can occur spontaneously, or are thermodynamically favorable. Endergonic reactions cannot occur spontaneously, or are thermodynamically unfavorable.

Report an Error

Example Question #5 : Understand Atp Coupling

ATP phosphorylation (ADP+ Pi-> ATP+ H2O) is what type of reaction?

Possible Answers:

endergonic

catabolic

spontaneous

exergonic

Correct answer:

endergonic

Explanation:

ATP hydrolysis is exergonic. ATP phosphorylation is the reverse of ATP hydrolysis, and thus is endergonic.

Report an Error

Example Question #6 : Understand Atp Coupling

If the reaction for ATP hydrolysis (ATP+ H2O-> ADP+ Pi, delta G= -30.5 kJ/mol) is coupled with the reaction glucose+ sucrose-> fructose, $delta \: G= +27 kJ/mol$ , what is the net delta G?

Possible Answers:

-3.5 kJ/mol

+3.5 kJ/mol

-7.0 kJ/mol

+8.9 kJ/mol

Correct answer:

-3.5 kJ/mol

Explanation:

Through ATP coupling, the hydrolysis of ATP can allow the second, thermodynamically unfavorable reaction to proceed. $Delta \: G= -30.5 kJ/mol + 27 kJ/mol= -3.5 kJ/mol$ . As the resulting delta is negative, this will be thermodynamically favorable.

Report an Error

View AP Biology Tutors

Shifrah
Certified Tutor

University of Maryland-Baltimore County, Bachelor of Science, Biology, General. Massachusetts College of Pharmacy and Health ...

View AP Biology Tutors

Cynthia
Certified Tutor

Arizona State University, Bachelors, Psychology. Arizona State University, Master in Public Health, Psychology.

View AP Biology Tutors

Madison
Certified Tutor

Lynn University, Bachelor of Science, Biological and Physical Sciences.

All AP Biology Resources

10 Diagnostic Tests 419 Practice Tests Question of the Day Flashcards Learn by Concept

Popular Subjects

Biology Tutors in Seattle, SSAT Tutors in Houston, Physics Tutors in Seattle, SAT Tutors in Boston, GRE Tutors in Seattle, French Tutors in Boston, Chemistry Tutors in Los Angeles, Statistics Tutors in Atlanta, GRE Tutors in Chicago, SSAT Tutors in Phoenix

Popular Courses & Classes

LSAT Courses & Classes in Boston, MCAT Courses & Classes in Seattle, SSAT Courses & Classes in Chicago, SSAT Courses & Classes in Miami, MCAT Courses & Classes in Phoenix, SSAT Courses & Classes in Philadelphia, GMAT Courses & Classes in Los Angeles, SAT Courses & Classes in Los Angeles, SSAT Courses & Classes in Atlanta, LSAT Courses & Classes in Dallas Fort Worth

Popular Test Prep

GRE Test Prep in Miami, GRE Test Prep in Houston, MCAT Test Prep in Denver, SSAT Test Prep in San Francisco-Bay Area, SAT Test Prep in Miami, ISEE Test Prep in Denver, SAT Test Prep in Los Angeles, MCAT Test Prep in Miami, GRE Test Prep in Chicago, ACT Test Prep in Atlanta

DMCA Complaint

If you believe that content available by means of the Website (as defined in our Terms of Service) infringes one or more of your copyrights, please notify us by providing a written notice (“Infringement Notice”) containing the information described below to the designated agent listed below. If Varsity Tutors takes action in response to an Infringement Notice, it will make a good faith attempt to contact the party that made such content available by means of the most recent email address, if any, provided by such party to Varsity Tutors.

Your Infringement Notice may be forwarded to the party that made the content available or to third parties such as ChillingEffects.org.

Please be advised that you will be liable for damages (including costs and attorneys’ fees) if you materially misrepresent that a product or activity is infringing your copyrights. Thus, if you are not sure content located on or linked-to by the Website infringes your copyright, you should consider first contacting an attorney.

Please follow these steps to file a notice:

You must include the following:

A physical or electronic signature of the copyright owner or a person authorized to act on their behalf; An identification of the copyright claimed to have been infringed; A description of the nature and exact location of the content that you claim to infringe your copyright, in \ sufficient detail to permit Varsity Tutors to find and positively identify that content; for example we require a link to the specific question (not just the name of the question) that contains the content and a description of which specific portion of the question – an image, a link, the text, etc – your complaint refers to; Your name, address, telephone number and email address; and A statement by you: (a) that you believe in good faith that the use of the content that you claim to infringe your copyright is not authorized by law, or by the copyright owner or such owner’s agent; (b) that all of the information contained in your Infringement Notice is accurate, and (c) under penalty of perjury, that you are either the copyright owner or a person authorized to act on their behalf.

Send your complaint to our designated agent at:

Charles Cohn Varsity Tutors LLC
101 S. Hanley Rd, Suite 300
St. Louis, MO 63105

Or fill out the form below:

Do not fill in this field

Contact Information

* Full legal name

Company name

* Phone number

* Email address

Address

* Address1

Address2

* City

* State

* Zipcode

* Country

Complaint Details

* URL of copyrighted work (where your original material is located)

* Please describe the copyrighted work so that it may be easily identified

I am the owner, or an agent authorized to act on behalf of the owner of an exclusive right that is allegedly infringed.

I have a good faith belief that the use of the material in the manner complained of is not authorized by the copyright owner, its agent, or the law.

This notification is accurate.

I acknowledge that there may be adverse legal consequences for making false or bad faith allegations of copyright infringement by using this process.

* Signature (your digital signature is legally binding)

HIGH SCHOOL

GRADUATE SCHOOL

K-8

Search 50+ Tests

math tutoring

science tutoring

foreign languages

elementary tutoring

other

Search 350+ Subjects

AP Biology : Understand ATP coupling

Study concepts, example questions & explanations for AP Biology

All AP Biology Resources

Example Questions

Example Question #1 : Understand Atp Coupling

Example Question #2 : Understand Atp Coupling

Example Question #3 : Understand Atp Coupling

Example Question #4 : Understand Atp Coupling

Example Question #5 : Understand Atp Coupling

Example Question #6 : Understand Atp Coupling

All AP Biology Resources

Report an issue with this question

DMCA Complaint

Contact Information

Address

Complaint Details

Email address:
Your name:
Feedback: