thermophiles vs psychrophiles (Please help!)

About microscopic forms of life, including Bacteria, Archea, protozoans, algae and fungi. Topics relating to viruses, viroids and prions also belong here.

Moderators: honeev, Leonid, amiradm, BioTeam

Post Reply
aztectgirl
Garter
Garter
Posts: 4
Joined: Mon Oct 08, 2007 11:42 pm

thermophiles vs psychrophiles (Please help!)

Post by aztectgirl » Tue Oct 09, 2007 1:35 am

Ok so will enzymes need to lower activation energy more or less in thermophiles than in psychrophiles?

high temperatures tend to denature proteins and that tends to be compensated by a decrease in activation energy of cellular reactions,
. At low temperatures, most molecules don’t have enough energy to react. But individual molecules can have more or less energy, because the temperature is the average energy of a system. With increased temperature there is an increase in the proportion of molecules with more energy than the activation energy. This causes the rate of reaction to increase. In a colder environment there is less energy, so lower activation energy is favorable so that energy can be stored and saved.

but which needs it more????

User avatar
mith
Inland Taipan
Inland Taipan
Posts: 5345
Joined: Thu Jan 20, 2005 8:14 pm
Location: Nashville, TN
Contact:

Post by mith » Tue Oct 09, 2007 1:57 am

Do you understand these terms first of all?
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr

aztectgirl
Garter
Garter
Posts: 4
Joined: Mon Oct 08, 2007 11:42 pm

Post by aztectgirl » Tue Oct 09, 2007 2:10 am

yes i do.. thermophiles exist in higher temp and psychrophiles exist in colder temp.. I have just had conflicting responses from other classmates.. but I thought psychrophiles b/c they exist in a cold temp and therefore dont have much energy.. but i dont know for sure

User avatar
mith
Inland Taipan
Inland Taipan
Posts: 5345
Joined: Thu Jan 20, 2005 8:14 pm
Location: Nashville, TN
Contact:

Post by mith » Tue Oct 09, 2007 3:14 am

You said:
With increased temperature there is an increase in the proportion of molecules with more energy than the activation energy.

Therefore, you have to worry less about activation energy. QED.
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr

aztectgirl
Garter
Garter
Posts: 4
Joined: Mon Oct 08, 2007 11:42 pm

Post by aztectgirl » Tue Oct 09, 2007 3:17 am

i just wanted to confirm if that was right.. it is my answer but I wanted to see if someone agreed.. do you??

Jammerz
Death Adder
Death Adder
Posts: 77
Joined: Thu Mar 22, 2007 4:02 am
Location: USA

Post by Jammerz » Tue Oct 09, 2007 5:04 pm

He does, and so do I.

Post Reply

Who is online

Users browsing this forum: No registered users and 5 guests