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21 votes

Why do plants have green leaves and not red?

I know this question was asked and answered a number of years ago (with many great answers), but I couldn't help but notice that no one had approached this from an evolutionary perspective (like the ...
theforestecologist's user avatar
16 votes

Chorophyll and photosynthesis in plants with coloured leaves

Most of ornamental (often variegated ) plants do performs photosynthesis. They do have chlorophyll even if their color is not green. They have non-green color due to various different pigments. These ...
Dexter's user avatar
  • 2,396
11 votes

Why is chlorophyll green? Isn't there a more energetically favorable color?

The reason that chlorophyll is green is because it absorbs other colors of light such as red and blue, so in a way the green light is reflected out since the pigment does not absorb it. Because life ...
Ebbinghaus's user avatar
  • 2,603
9 votes

Is circular DNA the same as plasmids?

A plasmid is a length of circular or linear double stranded DNA that exists independent of chromosomal DNA with a cell (i.e. extra-chromosomal DNA) and often confers a selective advantage to an ...
b4chemist's user avatar
  • 106
5 votes

Origin of the double membrane of mitochondria and chloroplasts

The answer lies in the protein composition of mitochondrial membranes, which undoubtedly prove that the outer membrane (OM) is of alphaproteobacterial origin, and the phagosomal membrane (if there was ...
István Zachar's user avatar
5 votes

What is this green micro-organism found living in water?

Have you considered that it might be algae? (I think it is.) There are many kinds of algae. I couldn't tell you which one yours is. Algae Under Microscope
anongoodnurse's user avatar
5 votes

Is Chemiosmosis a hypothesis or a theory?

Preamble Although there is a case for closing this question (it is two questions, the first of which is more linguistics, logic or philosophy of science, and the second well-covered in text books) I ...
David's user avatar
  • 26.2k
3 votes

How many photosystems in a chloroplast?

This article states that in plants at 15-25% relative water content (RWC), the PSII density is around ~700 complexes/µm$^2$, and in hydrated plants ~1500 complexes/µm$^2$. They also have some nice ...
pawelek zzz's user avatar
  • 1,087
3 votes

What happens to the absorbed blue and red light in the chlorophyll molecule?

It is glad to say that we can enter to this question due to having of valuable theorem of 1st law of thermodynamics. Energy cannot be destroy but it can convert in to another type of energy.The ...
Osal Thuduwage's user avatar
3 votes

Why do plants have green leaves and not red?

Small addition to the conversation: plants reflect green yes, but chlorophyll (a and b) does not (it is mostly transparent to it). The organic material (walls of cells, etc.) around the chlorophyll ...
A.G.'s user avatar
  • 31
3 votes

Chloroplasts in an animal cell

To answer your bigger question: Yes, most of this is possible - under some conditions -, and animals and animal cells can acquire chloroplasts, and use them. E.g.: see Elysia chlorotica whose cells ...
tsttst's user avatar
  • 1,597
3 votes

Why do proteins targeted for chloroplasts require two signal peptides?

Protein import to chloroplasts (and also mitochondria) can still have multiple destinations, because these structures themselves have sub-compartments: both have an inter-membrane space as well as an ...
Nicolai's user avatar
  • 4,391
2 votes

How fast does the rotor in ATP synthase spin?

The rotation rates at various ATP concentrations obeyed the curve defined by a K m of ≈30 μM and a V max of ≈350 revolutions per second (21 000 revolutions per minute) at 37°C. Some reported values of ...
PleoSet's user avatar
  • 21
2 votes

Why do plants have green leaves and not red?

Tobias Keinzler does a good job of explaining why black plants would not work, this is an explanation of why plants are green and not some other color. Color of foliage is based on whatever the ...
John's user avatar
  • 14.7k
2 votes

Do Gametes contain mitochondria/chloroplasts from their parent cell?

Is this DNA found in the mitochondria and chloroplasts coded for in the host's (animal's or plant's) DNA. No, the DNA contained in these organelles it not a subset of the nuclear genome. However, ...
Eliane B.'s user avatar
  • 1,145
2 votes

Evolution of plants and chloroplasts?

Modern biology attempts to group organisms by clades, that is, into groups that contain all descendants of a particular organism and no others. A clade may be associated with characteristics that ...
mgkrebbs's user avatar
  • 9,083
2 votes

Can we produce sugar using chlorophyll dissolved in ethanol?

The mechanism of photosynthesis proceeds via light-dependent reactions and light-independent reactions within the chloroplasts (organelles in cells which house the photosynthetic machinery, and indeed ...
S Pr's user avatar
  • 6,272
1 vote

Sources of chlorophyll fluorescence

Not an expert in this field, but a dig through the literature seems to indicate that the chlorophyll fluorescence that is generally referred to for measuring photoinhibition is indeed localized to or ...
Maximilian Press's user avatar
1 vote

Are stroma lamellum and grannum lamellum the same?

I will try to help. But, in the future, please post a picture of the confusing diagram to help us help you. edit: now that I see your diagram, I'm not sure if this answer is helpful. Will re-...
laporp's user avatar
  • 443
1 vote

What plants use the green spectrum?

Green is pretty much the last color that you'd want for a plant. Thinking logically, a plant is green because it reflects green light, and hence, plants do not absorb green light for photosynthesis. ...
Twisted Genes's user avatar
1 vote

Reaction centre in Photosystems of higher plants

Someone else too had asked your question no. 2. here Photosystem 1 and 2; P680/P700; Chlorophyll a/b The answer basically quotes Molecular Biology 4 ed. by Lodish as follows. "The chlorophylls in ...
Lifeisafartinthewind's user avatar
1 vote

Photosystem 1 and 2; P680/P700; Chlorophyll a/b

From what I understand both photosystems contain chlorophyll a, although they are modified differently in each case which changes their absorption spectra accordingly. Sources:
idanp's user avatar
  • 71
1 vote

Photosystem 1 and 2; P680/P700; Chlorophyll a/b

The antenna pigments are predominantly chlorophyll b, xanthophylls, and carotenes. Chlorophyll a is known as the core pigment. Their absorption spectra are non-overlapping and broaden the range of ...
Anubhav Goel's user avatar

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