Post homework questions online and get free homework help from tutors.
Learn More
Improve Grades
Help Others
Save Time
Accessible 24/7
  602 People Browsing
Related Images
What percentage of nature vs. nurture dictates human intelligence?
100% Nature
75% Nature; 25% Nurture
50% Nature; 50% Nurture
25% Nature; 75% Nurture
100% Nurture
If you would like to vote in this poll, please login or register

Previous poll results: Which is the WORST study habit?
New Topic  
Posts: 72
Rep: 0 0
5 years ago
What is the difference between a cofactor and a coenzyme?
Read 3347 times
2 Replies
5 years ago
Coenzymes are biochemical products of a cell that are required for some process - they are a protein product of DNA transcription.

Cofactors are external products brought into a cell that bind to an enzyme and help it do its job.  Cofactors are often metal ions.
Answer accepted by topic starter
Posts: 127
Rep: 0 0
5 years ago
To view this post and more
You'll need to login or register
Coenzymes are proteins that bind to an enzyme to "activate" it, allowing it to do its job.  Without its respective coenzyme, an enzyme is called an "apoenzyme."  With the coenzyme, it is called a "haloenzyme."  Note: most enzymes do not require a coenzyme.  Some texts refer to all coenzymes as cofactors but biochemists generally try to separate the two.  However, not all cofactors are coenzymes, nor do all cofactors unite with enzymes.  While it is true they are often metals, they can be proteins (as in the blood clotting cascade), and can function outside the cell, yet themselves are produced in a cell (with clotting cofactors, produced in hepatocytes, specialized cells of the liver).  According to Dorland, a cofactor is "an element or principle, as a coenzyme, with which another must unite in order to function."
New Topic      
Share This Topic
Similar topics that might interest you...
Biochemistry   5 years ago   Illo_88   mikef522   1 Reply   443 Views
Biochemistry   5 years ago   mikeee   irina   2 Replies   645 Views
Biochemistry   5 years ago   irina   ilkat   1 Reply   1879 Views
Chemistry   3 months ago   steden   ford1001   1 Reply   24 Views
This topic is currently locked from adding new posts. Only administrators and moderators can reply. If you'd like to contribute to this topic, start a new thread and make reference to this one. Otherwise, contact a moderator for more options.