1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
PtichkaEL [24]
3 years ago
15

Which of the following statements correctly describes some aspect of ATP hydrolysis being used to drive the active transport of

an ion into the cell against the ion's concentration gradient? (see book section: Concept 8.2: The free-energy change of a reaction tells us whether or not the reaction occurs spontaneously and see book section: Concept 8.3: ATP powers cellular work by coupling exergonic reactions to endergonic reactions)
A) The hydrolysis of ATP is endergonic, and the active transport is exergonic.
B) This is an example of energy coupling.
C) Both ATP hydrolysis and active transport are spontaneous because they result in an increase in entropy of the system.
D) Neither ATP hydrolysis nor active transport is spontaneous.
E) ATP is acting as a transport protein to facilitate the movement of the ion across the plasma membrane.
Biology
1 answer:
saw5 [17]3 years ago
8 0

Answer:

B) This is an example of energy coupling

Explanation:

Energy coupling is a process by which cells carry out thermodynamically unfavorable, endergonic (energy-requiring) reactions to other exergonic (reactions that liberate free energy) reactions.

Reactions which are endergonic do not occur spontaneously as they result in a decrease in entropy and a positive free energy change, ∆G.

Exergonic reactions occur spontaneously as they result in an increase in entropy and have a negative free energy change, ∆G.

For example, the active transport of ions against their concentration gradients in cells is a non-spontaneous endergonic process which is coupled to the hydrolysis of ATP, an exergonic process in other for the reaction to proceed. ATP hydrolysis phosphorylates an amino acid side chain in the transport protein which then drives the forward process of transport of the ion.

Considering the above,

Option A: The hydrolysis of ATP is endergonic, and the active transport is exergonic is false because ATP hydrolysis is exergonic while active transport is endergonic.

Option B: This is an example of energy coupling is true.

Option C: Both ATP hydrolysis and active transport are spontaneous because they result in an increase in entropy of the system is false because only ATP hydrolysis is spontaneous

Option D: Neither ATP hydrolysis nor active transport is spontaneous is false because ATP hydrolysis is spontaneous.

Option E: ATP is acting as a transport protein to facilitate the movement of the ion across the plasma membrane is false because ATP is not a protein, rather it serves to activate the transport protein by phosphorylating it.

You might be interested in
What is the term used to identify a molecule responsible for reducing the amount of
Travka [436]
An enzyme. An enzyme is a protein speed up a biochemical reaction. It’s a catalyst.

Hope this helps :)
4 0
2 years ago
Read 2 more answers
What phase is Homologous chromosome paired.
kumpel [21]

In metaphase I of meiosis I, the pairs of homologous chromosomes, also known as bivalents or tetrads, line up in a random order along the metaphase plate. The random orientation is another way for cells to introduce genetic variation.

4 0
3 years ago
Ignore the one that’s selected i accidentally clicked on it but please help!!
nlexa [21]

Answer:

I think it's the second one or first one

5 0
3 years ago
When salt water i added to a plant cell why does the cell membrane srink
borishaifa [10]

If a higher concentration of salt is placed outside of the cell membrane, the water will leave the cell to bond with it. The loss of water from this movement causes plant cells to shrink and wilt.

5 0
3 years ago
True or false? silicate makes up over 90 percent of earths crust?
zhuklara [117]

Answer:

F

Explanation:

3 0
3 years ago
Read 2 more answers
Other questions:
  • What does a eukaryotic cell have that a prokaryotic cell theory?
    9·2 answers
  • In sigmund freud's theory, the _______ operates according to the pleasure principle. (1 point)
    14·1 answer
  • When is observation a better tool for proving a hypothesis than experimentation
    12·1 answer
  • In what way do the membranes of a eukaryotic cell vary?
    10·1 answer
  • WILL MARK BRAINLIEST
    5·1 answer
  • If microscopes that could take closer looks were in existence, why do you think it took so long for scientists to come to the re
    8·1 answer
  • The diagram below shows some of the steps in protein synthesis.
    5·1 answer
  • If there is dissolved carbon dioxide in the water, are underwater plants able to perform photosynthesis? Explain why or why not.
    8·1 answer
  • What is scientific law?<br>​
    15·1 answer
  • The presence of what cellular structure distinguishes a plant cell from an animal cell?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!