/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 42 What is phosphorylation as it oc... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 6: Problem 42

What is phosphorylation as it occurs in chemical reactions? a. Phosphorylation refers to the attachment of a phosphate to another molecule to facilitate a chemical reaction. b. Phosphorylation is the uptake of a phosphorous molecule by an ATP molecule to power chemical reactions. c. Phosphorylation is the release of a third phosphorous molecule of ATP during hydrolysis. d. Phosphorylation is the breakdown of a pyrophosphate molecule which gives phosphate ions.

Short Answer

Expert verified
Option (a) is correct.

Step by step solution

01

Understanding Phosphorylation

Phosphorylation is a biochemical process involving the addition of a phosphate group \(\text{PO}_4^{3-}\) to an organic molecule. This process is critical in various cellular processes, especially in the regulation of enzyme activity and the energy transfer in cells.
02

Analyze Option (a)

Option (a) mentions the attachment of a phosphate to another molecule to facilitate a chemical reaction. This is a common description of phosphorylation, as the addition of a phosphate group can activate or deactivate enzymes and other proteins.
03

Analyze Option (b)

Option (b) states that phosphorylation is the uptake of a phosphorous molecule by an ATP molecule to power chemical reactions. This is incorrect, as it describes the creation of ATP rather than phosphorylation itself.
04

Analyze Option (c)

Option (c) indicates that phosphorylation is the release of a third phosphorous molecule of ATP during hydrolysis. This describes the breakdown of ATP into ADP and an inorganic phosphate, not phosphorylation.
05

Analyze Option (d)

Option (d) suggests that phosphorylation is the breakdown of a pyrophosphate molecule which gives phosphate ions. This describes the hydrolysis of pyrophosphate, not phosphorylation.
06

Conclusion

Based on the analysis of the options, option (a) correctly describes phosphorylation as the attachment of a phosphate to another molecule to facilitate a chemical reaction.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

Key Concepts

These are the key concepts you need to understand to accurately answer the question.

ATP
ATP, or adenosine triphosphate, is a molecule that carries energy within cells. It is often referred to as the energy currency of the cell. ATP is composed of adenine, ribose, and three phosphate groups. The energy stored in ATP is released when one of the phosphate groups is cleaved off, transforming ATP into ADP (adenosine diphosphate). This release of energy is used by cells to perform various functions, such as muscle contraction, nerve impulse propagation, and chemical synthesis. ATP is continuously regenerated from ADP and inorganic phosphate through processes like cellular respiration.
phosphate group
A phosphate group consists of a phosphorus atom bonded to four oxygen atoms and carries a negative charge (PO_4^{3-}). This group is essential in biochemistry because it can be added or removed from molecules in cells, modulating their activity. Phosphate groups are involved in energy storage and transfer, especially in ATP, where three phosphate groups are lined up. The removal or addition of a phosphate group can significantly alter a molecule's properties, making phosphate groups crucial for enzyme regulation and cellular signaling pathways.
enzyme regulation
Enzyme regulation is the process by which the activity of enzymes is controlled in the cell. Phosphorylation plays a significant role in this regulation by either activating or deactivating enzymes. Enzymes are proteins that catalyze biochemical reactions, and their activity must be tightly controlled to ensure that the cell functions properly. The addition of a phosphate group can change the shape of an enzyme, thus altering its activity. This regulatory mechanism ensures cells can respond quickly to changes in their environment and maintain homeostasis.
cellular energy transfer
Cellular energy transfer refers to how energy is transferred within cells to conduct various biological processes. ATP is central to this process, as it carries and delivers energy where it is needed. When a phosphate group is removed from ATP, energy is released and used for cellular activities. This makes ATP a pivotal molecule in energy transfer. Cellular respiration, the process of breaking down glucose to produce ATP, is another critical aspect. Energy transfer is vital for maintaining cellular functions such as metabolism, growth, and repair.

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

It has been accepted that life on the Earth started out as single celled, simple organisms, which then evolved into complex organisms. How did evolution proceed to produce such a wide variety of living organisms from a simple ancestor? a. Prokaryotes produced the fungi, then the protists which then branches to plants and animals. b. Protists evolved first, then the prokaryotes, which branched into the fungi, plants, and animals c. Prokaryotes produced the protists, which branched into the fungi, plants, and animals. d. Prokaryotes produced the protists, then the fungi, which branched into the plants and animals.

Why is ATP considered the energy currency of the cell? a. It accepts energy from chemical reactions. b. It holds energy at the site of release from substrates. c. It is a protein. d. It can transport energy to locations within the cell.

If glucose is broken down through aerobic respiration, a number of ATP can be made from the energy extracted. How many ATP are possible? a. 2 to 4 b. 36 to 38 c. 10 to 12 d. 24 to 30

Which of the following is the best way to judge the relative activation energies between two given chemical reactions? a. Compare the \(\Delta G\) values between the two reactions. b. Compare their reaction rates. c. Compare their ideal environmental conditions. d. Compare the spontaneity between the two reactions.

Label each of the following systems as high or low entropy: 1\. perfume the instant after it is sprayed into the air 2\. an unmaintained 1950 s car compared with a brand new car 3\. a living cell compared with a dead cell a. \(1 .\) low 2\. high 3\. low b. \(1 .\) low 2\. high 3\. high C. \(1 .\) high 2\. low 3\. high d. \(1 .\) high 2.. low 3\. low
See all solutions

Recommended explanations on Biology Textbooks

Ecological Levels

Read Explanation

Substance Exchange

Read Explanation

Cell Communication

Read Explanation

Control of Gene Expression

Read Explanation

Chemistry of Life

Read Explanation

Biological Processes

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.