Login

Join for Free!
114818 members


What is the primary energy source for cells?

Debate and discussion of any biological questions not pertaining to a particular topic.

Moderator: BioTeam

What is the primary energy source for cells?

Postby HAiKUGiRL » Wed Mar 19, 2008 4:47 am

A) Starch
B) Cellulose
C) Glucose
D) Sunlight
E) ATP

I'm debating between glucose and sunlight..

I know sunlight provides the energy source for food chains, etc. but glucose also provides energy to the cell after glycolysis and stuff.

Anyone?
HAiKUGiRL
Garter
Garter
 
Posts: 21
Joined: Sat Mar 08, 2008 3:51 am

Postby mith » Wed Mar 19, 2008 5:39 am

Can you survive on sunlight?
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr
User avatar
mith
Inland Taipan
Inland Taipan
 
Posts: 5345
Joined: Thu Jan 20, 2005 8:14 pm
Location: Nashville, TN

Re: What is the primary energy source for cells?

Postby HAiKUGiRL » Wed Mar 19, 2008 10:26 am

Never any definitive answers are there ;)

no you can't survive on it
HAiKUGiRL
Garter
Garter
 
Posts: 21
Joined: Sat Mar 08, 2008 3:51 am


Postby mith » Wed Mar 19, 2008 2:26 pm

It isn't? I thought it's pretty cut and dry.
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr
User avatar
mith
Inland Taipan
Inland Taipan
 
Posts: 5345
Joined: Thu Jan 20, 2005 8:14 pm
Location: Nashville, TN

Re: What is the primary energy source for cells?

Postby Darby » Wed Mar 19, 2008 6:15 pm

It all comes down to how you define "primary."

If it's the source that actually is used when cell processes need energy, it's one thing.

If it's the material that cells take in and convert, it's another thing.

If it's the first step in the line, it's something else.

Those all could be defined as "primary sources."

Hey, that eliminates 3 possibilities...
Darby
Viper
Viper
 
Posts: 1262
Joined: Thu Mar 02, 2006 5:29 pm
Location: New York, USA

Re: What is the primary energy source for cells?

Postby HAiKUGiRL » Wed Mar 19, 2008 8:49 pm

Apparently my teacher said it was ATP .. ahh shucks.
HAiKUGiRL
Garter
Garter
 
Posts: 21
Joined: Sat Mar 08, 2008 3:51 am

Postby Cat » Thu Mar 20, 2008 12:16 pm

Your teacher is wrong.

A) Starch - Primary energy storage (in plants)
B) Cellulose - Structural, can be used for energy only by some fungi and maybe few bacteria
C) Glucose - Primary energy source
D) Sunlight - Required for photosynthesis light RXN.
E) ATP - Primary energy currency
Cat
King Cobra
King Cobra
 
Posts: 625
Joined: Thu Feb 14, 2008 7:40 pm

Postby mith » Thu Mar 20, 2008 4:56 pm

Poor question and/or answer. ATP is an intermediate for energy use but it is by no means a "source."
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr
User avatar
mith
Inland Taipan
Inland Taipan
 
Posts: 5345
Joined: Thu Jan 20, 2005 8:14 pm
Location: Nashville, TN

Re: What is the primary energy source for cells?

Postby MichaelXY » Thu Mar 20, 2008 6:30 pm

I found this on a website, and they worded it as follows:

Mitochondria: Mitochondria provide the energy a cell needs to move, divide, produce secretory products, contract - in short, they are the power centers of the cell. They are about the size of bacteria but may have different shapes depending on the cell type. Mitochondria are membrane-bound organelles, and like the nucleus have a double membrane. The outer membrane is fairly smooth. But the inner membrane is highly convoluted, forming folds (cristae) as seen in the cross-section, above. The cristae greatly increase the inner membrane's surface area. It is on these cristae that food (sugar) is combined with oxygen to produce ATP - the primary energy source for the cell.
User avatar
MichaelXY
King Cobra
King Cobra
 
Posts: 885
Joined: Fri Jun 15, 2007 7:03 pm
Location: San Diego, Ca

Postby Cat » Thu Mar 20, 2008 7:14 pm

ATP has been called many things:
primary energy source
energy storage
energy currency

I can find books and webs for each one, so, I agree with Mith that question is unfair.

only energy currency is the one that makes most sense.
Source, in my understanding, is where energy is coming from, in this case - glucose is the source and ATP is product.
Cat
King Cobra
King Cobra
 
Posts: 625
Joined: Thu Feb 14, 2008 7:40 pm

Re: What is the primary energy source for cells?

Postby MichaelXY » Fri Mar 21, 2008 4:46 am

Ok, let's suppose that you were asked the question; what is the primary source of energy for an automobile?
Would you answer gasoline, or crude oil?
User avatar
MichaelXY
King Cobra
King Cobra
 
Posts: 885
Joined: Fri Jun 15, 2007 7:03 pm
Location: San Diego, Ca

Postby Cat » Fri Mar 21, 2008 3:22 pm

Crude oil has nothing to do with the car. I am not calling sucrose a primary energy source either.

O.K. Let’s try your analogy:

Glucose to ATP to energy
Benzene to intermediate to energy

Would you call benzene a source or one of the intermediates (say phenol) as source? To me ‘source’ is whatever you add to the system to get energy.

Maybe between us we could give a consensus on what ATP should be called – as far as I understand there isn’t one yet. :wink:
Cat
King Cobra
King Cobra
 
Posts: 625
Joined: Thu Feb 14, 2008 7:40 pm

Next

Return to General Discussion

Who is online

Users browsing this forum: No registered users and 9 guests

cron