Question and answer
Which of the following is NOT a part of an ATP molecule? A. adenine B. ribose C. chlorophyll D. phosphate
Chlorophyll B is, chemically, very similar to hemoglobin (the stuff that carries oxygen in your bloodstream and gives it that lovely red color). [ [ However, hemoglobin is an iron porphyrin (Fe surrounded by four pyrroles, which are organic ring molecules with nitrogen atoms surrounding the Fe), whereas chlorophyll (A&B) is a magnesium porphyrin. Chlorophyll is an effective photoreceptor
(capture light energy efficiently) because they have alternating single and double bonds. Because of a slight difference in their structures, A and B tend to absorb light over different ranges of wavelengths, and therefore the two complement each other in biological systems (i.e. in plants). However, it is not enough to just absorb the light energy; there must also be efficient means of transferring that energy to chemical potential (i.e. to transform it into a form that it can be used to do some work). In biological systems, a complex sequence of reactions within a cellular structure, called a chloroplast, uses the light energy to make chemical energy by reducing CO2. In other words, your "bio-solar cell" would have to somehow either (1) mimic this process, which sounds pretty tough, or (2) somehow transfer energy directly into the motion of electrons (which could cause a current, etc.). Then, you would have to figure out a way to make a cell which would prevent the chlorophyll from degrading. Anyway, what I wanted to say was, it is tough to make a solar cell that is more efficient than a chloroplast; it absorbs photons with near-unit efficiency (almost every photon that hits a chlorophyll molecule gets absorbed) and transforms light energy to chemical energy very efficiently as well. But a plant can always make more of it when it starts to degrade, and a solar cell made by man cannot repair itself. I hope these meandering observations helped! Robert Topper ] ]
Expert answered|rutie|Points 35|
Question|Rated good
Asked 12/15/2010 9:12:57 AM
0 Answers/Comments
Get an answer
New answers
Rating

There are no new answers.

Comments

There are no comments.

Add an answer or comment
Log in or sign up first.
Questions asked by the same visitor
Plaintiffs in tort suits are seeking a(n) A. waiver. B. tort. C. remedy. D. immunity.
Weegy: B. tort User: Jorie slipped and spilled his hot coffee on Tim. Tim retaliated by throwing his lemonade on Jorie. Jorie committed A. no tort. B. assault. C. battery. D. inflection of emotional distress. Weegy: A. no tort. User: Copyrights protect A. any expression that is registered with the copyrights office. B. any invention that is novel or truly new. C. any invention that is created. D. any expression that is somehow fixed (written down or stored on a computer disk). Weegy: C. any invention that is created. User: Which of the following is a defense to intentional torts? A. consent B. negligence C. insanity D. assumption of risk (More)
Question
Expert Answered
Asked 12/14/2010 8:04:23 AM
0 Answers/Comments
Going to court instead of using mediation or negotiation can sometimes make this type of case worse. A. murder B. divorce C. shoplifting D. robbery
Weegy: B. divorce User: Which position requires advocacy? A. judge B. jury C. defense attorney D. arbitrator (More)
Question
Expert Answered
Asked 12/14/2010 11:08:26 AM
0 Answers/Comments
18,461,631 questions answered
Popular Conversations
Soil with high amounts of _______ ions is acidic
Weegy: Soil with high amounts of rainfall is acidic. User: Soil formation is most influenced by _____. wind ...
11/28/2014 5:24:04 PM| 3 Answers
____________ adjusts the viscosity of the ...
Weegy: Solvent is the answer which is not in your choices.Viscosity is thickness, most relevant answer within your ...
11/28/2014 12:00:37 AM| 1 Answers
Which of the following bodily systems is NOT at immediate risk of ...
Weegy: c) respiratory system User: Which of the following is NOT a learning difficulty children with fetal alcohol ...
11/28/2014 12:23:38 AM| 1 Answers
A monograph is __________. A. an OTC drug that has been submitted ...
Weegy: A monograph is B. an application form the FDA used for OTC drugs. User: Switching drugs to OTC status ...
11/28/2014 12:53:08 AM| 1 Answers
Weegy Stuff
S
L
1
L
P
C
1
P
C
1
L
P
C
1
Points 2939 [Total 14649]| Ratings 11| Comments 2829| Invitations 0|Offline
S
L
Points 1480 [Total 3766]| Ratings 0| Comments 1480| Invitations 0|Offline
S
Points 883 [Total 915]| Ratings 1| Comments 873| Invitations 0|Offline
S
1
L
1
L
P
P
L
P
Points 786 [Total 14160]| Ratings 0| Comments 786| Invitations 0|Offline
S
L
Points 777 [Total 1298]| Ratings 6| Comments 717| Invitations 0|Offline
S
1
L
L
Points 273 [Total 6667]| Ratings 0| Comments 273| Invitations 0|Offline
S
L
Points 163 [Total 1459]| Ratings 3| Comments 133| Invitations 0|Offline
S
Points 149 [Total 149]| Ratings 1| Comments 139| Invitations 0|Offline
S
Points 50 [Total 50]| Ratings 0| Comments 0| Invitations 5|Offline
S
Points 46 [Total 46]| Ratings 3| Comments 6| Invitations 1|Offline
Home | Contact | Blog | About | Terms | Privacy | Social | ©2014 Purple Inc.