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comment When is Water Produced During Photosynthesis?
@aandreev You can't think of this reaction as a math formula, the water on the right is actually produced by the reaction, it is not left over. While green plants use $H_{2}O$, some bacteria use $H_2S$ instead and they also produce water on the right. Also, this shows the net reaction which has many, many intermediate steps. The basic reaction is $CO_2+2H_2O \rightarrow (CH_{2}O)+O_2+H_2O$. However, to produce glucose ($C_6H_{12}O_6$), you need 12 water molecules and 6 of carbon dioxide. I love it when physicists try to do biology.
Apr
23
revised Do non-enzyme catalysed reaction pathways exist?
Copy edit
Apr
20
revised Non Coding DNA and its effect on evolution
Copy edit
Apr
19
comment Comparative Genomics
Relevant discussion on orthologs vs paralogs: What is the difference between orthologs, paralogs and homologs?
Apr
19
revised Comparative Genomics
added 15 characters in body
Apr
19
answered Comparative Genomics
Apr
18
comment ncbi+ build blast_demo app
I'm voting to close this question as off-topic because it is about the compilation of a program, not biology.
Apr
18
comment ncbi+ build blast_demo app
Hi and welcome to the site. I'm afraid this is off topic here since it's about compiling blast as opposed to using it. You could try asking on Stack Overflow but I think your best bet would be biostars.org which is a Q&A site about bioinformatics. You'll get better answers if you explain what you consider to be "a lot of disk space". Also bear in mind that, if you're compiling NCBI blast, that will also include the various flavors (blastx, blastn, tblastn, tblastx, psi-blast etc) you can't expect it to be tiny.
Apr
17
comment Organisms that contain rare chemical elements
In that case, please edit your question to reflect what you're currently asking. Most of the elements you mention will be present in, basically, most organisms. Which ones are you asking about? Oh, and this article suggests that tin is an essential nutrient in humans as well. Please edit and narrow the question down to something specific that we can answer.
Apr
17
comment Organisms that contain rare chemical elements
Selenium is an essential trace nutrient, what makes you think humans don't have it? For example, we have ~22 (or 25, depending on how you count them) selenoproteins, each of which contains at least one selenocysteine amino acid which is a cysteine analog with Selenium in the place of sulfur. In fact, I would be surprised if any of these elements is not present (at least in trace amounts) in the human body. Do you have any references that support the absence of one of these?
Apr
17
revised Organisms that contain rare chemical elements
deleted 3 characters in body; edited title
Apr
16
revised Are prosauropods ancestors of all sauropods?
edited body; edited tags
Apr
15
reviewed Satisfactory Why do people with Down syndrome get fewer cancers?
Apr
15
reviewed Satisfactory Clarification on the “orientation” of chromosomal rearrangements
Apr
15
reviewed Satisfactory Cellular Respiration/Fermentation Problem Leading to Lack of Energy
Apr
15
reviewed Satisfactory How does it make thermodynamic sense for photosynthesizers to turn CO₂ into O₂?
Apr
15
reviewed Excellent Authority on Microbiological Definitions
Apr
15
reviewed Needs Improvement How do genetic chimeras with different blood types not die?
Apr
15
reviewed Excellent Why do we urinate more when we are nervous?
Apr
15
reviewed Satisfactory I found these skulls in a old bottle in the woods. Can you tell me what they are?