Tag Info

Hot answers tagged

20

Wow, as an astrophysicist who has just logged into biology SE for the first time, I didn't think I'd have a question I could immediately answer. You are correct about the Sun's output, so what about the lion. If the lion is in its usual passive state, i.e. lying around as shown in your picture, then you would not go far wrong in treating them as black body ...


5

Where I studied, every undergrad read Campbell Biology. You can start it as a non-specialist but you will not be one at the end..


5

Quantitative descriptions of leaf shape used as diagnostics are hard to come by. There are numerous qualitative descriptions (lyrate, cordate, acicular, etc.), and I think this fits within the example you give that "the laminar shape for this species is mainly ovate." But actual quantitative ranges as you mention (e.g., that the L:W ratio of Acer lies within ...


5

There are a number of more recent papers dealing with phylogenetic methods in reconstructing language history as well, including work by Colin Renfrew and Quentin Atkinson. Here are two recent high-profile papers. Unfortunately, both are still behind paywalls, but even reading the list of papers they cite / that cite them would be a great way to answer your ...


5

The sun will win until you have enough lions to form a star sized mass. Assuming that your lions have an average mass of 200kg, which is probably pretty close, 1 trillion lions has a mass of 2×1014 kg, which is pretty close to the mass of Remus, a moon around the asteroid Sylvia. The mass of the sun is about 2×1030 kg. So your lions would have enough mass ...


4

There is one book that will perfectly suits your needs: A biologist's guide to Mathematical Modeling in Ecology and Evolution, by Sally Otto It is a very good book that is very easy to understand and in the meantime goes pretty far (It ends with the use of diffusion equation in Evolutionary Biology). I highly recommend it. It covers: How to create a ...


4

In human cells it takes about 20 s to make a 20,000 dalton enzyme. Assuming that the cells concerned are already making mRNA for the enzyme, there will be two main factors: (1) The time taken to synthesize the polypeptide (2) Any time taken to fold the protein (If the enzyme is secreted from the cell there will also be the time taken for the protein to ...


4

The quote refers to 'robber' bees, but in today's terminology, there are actually three separate phenomena. "Cheating" in bees and other social animals refers to the exploitation of a social contract for one's own benefit. Example: bee workers lay their own eggs rather than tending those of the queen. "Laziness" or "inactivity" of bee or other social insect ...


4

The model used by Jamshidi et al. can be found in the BioModels database with acession no. MODEL1103210001 http://www.ebi.ac.uk/compneur-srv/biomodels-main/MODEL1103210001 A more recent model has also been described in Bordbar et al. iAB-RBC-283: A proteomically derived knowledge-base of erythrocyte metabolism that can be used to simulate its physiological ...


4

Check this out. This resource lists organic cofactors and the associated enzymes. See the wikipedia page also. Many metals also serve as prosthetic groups in enzymes. They include- Magnesium, Manganese, Iron, Cobalt, Nickel, Copper, Zinc, Molybdenum. FeS clusters are also an important part in many important enzymes in mitochondria and plastids.


4

There are various types of Mushroom identification Sites. you can take help from: Mushroomexpert Rogersmushrooms MycoKey 4.0 Source: MycoKey 4.0


3

I would suggest something like "The Selfish Gene" by Richard Dawkins. It covers many examples or organisms and how their behaviour at a molecular level is ultimately selfish in order to ensure survival by passing their genes, which is perhaps the most important biological function of any living organism. However, as pointed in comments below, this book ...


3

The Campbell Biology is a good very introductory book to biology. However, it is popular book but a very standard text book. I am not aware of any popular and introductory book that are broad enough to encompass all of biology. I would suggest that you get the campbell and in parallel you can follow free online courseware. There are lots of them. Starting ...


3

Cofactor: coenzymes are organic molecules that are required by certain enzymes to carry out catalysis. Database: CoFactor - The organic enzyme cofactor database of EBI Examples:


3

well i had done some search on this before but not for CHO (I checked for the cells that I was culturing). i can look up for more. Just pasting the data that I have right now. Cell type Total G1 S G2 M S+G2/G1 Ref Neuro2a 9 2 5 1.5 0.5 3.25 De Laat et al 1980 PNAS Hela 16.2 7.7 7.2 ...


3

I'm going to work this from the angle of power the animals could produce for an extended (e.g. 1 hour) time. I'll assume that a lion produces power somewhere between that of a human and a horse, since the typical weight of a lion (180 kg/400 lb-ish for males) is between that of a human (80 kg/180 lb-ish for males) and a horse (850 kg/1800 lb-ish for draft ...


3

The best resource for troubleshooting ligations I found (and use frequently) is this NEB page. That is assuming you've already referred to the instructions provided with the enzyme you're using. In my case it's T4 Ligase, again from NEB. It's helpful to check the FAQs and the references listed on that page. Also, you can make use of their Molar ...


2

BioNumbers is a database that contains exactly this sort of stuff. For example, I took this from this site: Number of mitochondria per cell: Yeast Cryptococcus neoformans cell: ~34 Human HELA cell: ~6000 Mouse L cell: ~1000


2

I don't have access to Provine's book, and I can't describe the details of the hooded rat experiments, but here is an attempt to explain the importance of the work. Darwin published “Origin of Species” in 1859. He proposed that modern species were all descended from ancestral species, and that evolution proceeded by natural selection. He believed that ...


2

SNPs in all these regions will modify the DNA sequence. Effects will depend on where exactly the SNP is. I'll summarize the conditions in which effects can be maximum Transcription Factors (TFs) binding sites: SNP in the nucleotide positions that bind to the recognition amino acids in the TF Epigentic signals: C->X [x: A,G,T] SNPs can disrupt DNA ...


2

Branching processes (from probability theory) were originally developed to study the extinction of family names (Galton-Watson process), but are also used to study biological extinction and general evolutionary processes. One example that applies ideas from branching processes and phylogenetic methods to reconstruct ancient languanges can be found in Forster ...


2

It may also be called as Idea of maximum parsimony. It is used in phylogenetics to construct phylogenetic trees which require the least number of evolutionary events.


2

You might begin your search with the characteristics of Parkinson's disease. This degenerative disorder is precipitated by the death of neurons in the substantia niagra. This brain structure is composed of multiple neurological nuclei. Its function is to connect cortical regions and nuclei together, most significantly with the basal ganglia. The difference ...


2

The MCM's book is good one. I recommend the book BRS Microbiology and Immunology, because then you can see the thing in the real context and have good exercises too. First Aid for the USMLES Step 1 then explains you how to read for immunology and gives you rather good summary about the topic and some mnemonics.


2

Cellular and Molecular Immunology Abul K. Abbas MBBS (Author), Andrew H. H. Lichtman MD PhD (Author), Shiv Pillai MD (Author) This was my Fall 2011 Basic Immunology text for a hybrid med-school/undergrad class at my University. I have not read others, but every time the topic of Immune responses comes up in other Undergrad courses, I have been well or ...


1

Alongwith campbell ,look up some "advanced" books - like Bruce Alberts molecular biology of The Cell , Lehninger, etc. It is not necessary to read everything in those books. Read whichever topics interest you the most. There is also a very good site : ibiomagazine.org which has videos of some of the big shots of biology. And remember, most important is ...


1

The principle of least effort / path of least resistance fit pretty well: animals, people, and systems (like evolution or a mechanical system like a machine) will naturally choose the path of least resistance or effort. The principal applies to chemistry (low energy states) and physics (the path an electrical current takes) as well. Occam's Razor fits ...


1

The idea of tumour heterogeneity has been around for a long time (look at the below review and the refs therein), but the underlying causes have been revised in the light of theoretical advances and the novel (Gerlinger et al.) genetic data. Firstly genetic heterogeneity was largely believed to be the cause of genetic instability (an increased mutation ...


1

It's quite interesting that the first reference that come to mind is not a mathematical/theoretical one (which is, in all likelihood, going to be a lot older than the one I am going to mention) but a clinical one. That would be Gerlinger and Swanton and their paper in the New England Journal of Medicine.



Only top voted, non community-wiki answers of a minimum length are eligible