4
votes
0answers
29 views

How much do urban pigeons move around cities?

Do they tend to live their lives in one area of the city or do they move around? For example, do pigeons born on London's Trafalgar Square live their whole lives centered around Trafalgar Square or ...
3
votes
3answers
272 views

How long could Earth's oxygen supply last if no new oxygen were produced? [closed]

I read in an article or heard in some documentary that there's so much oxygen in the atmosphere that even if all photosynthesis stopped, there's already enough to last us a long time. Is this ...
3
votes
0answers
53 views

Are plants really oxygen neutral?

This accepted and most upvoted answer to the question Does grass alone produce enough oxygen for life? claims that plants are oxygen neutral: Plants are oxygen neutral The question wording is a ...
0
votes
1answer
40 views

What is this little white creature?

Please identify this little and soft white creature. Since childhood I am seeing this things flying in my surroundings and nowadays they are seen occasionally.
0
votes
1answer
18 views

How can you develop a bacterial infection when taking antibiotics for another area of the body with a bacterial infection? [closed]

How can you develop a bacterial infection when taking antibiotics for another area? For example, "if someone was prescribed an antibiotic for a bacterial infection of the throat and while taking the ...
3
votes
1answer
56 views

What is a “monomeric polypeptide”?

In the sentence: "Bacteriophage (viral) polymerases are typically monomeric polypeptides". I know that polypeptides are chains of amino acids monomers. But what is a "monomeric polypeptide" and what ...
0
votes
1answer
25 views

Can ncRNA convert to coding RNA/mRNA by mutations?

DNA has transcribed into RNA (Non-coding). Can this RNA mutate and become a Protein-Coding one/mRNA? Have there been any such instances reported by scientists?
0
votes
0answers
14 views

Ewens-Watterson Test of Neutrality

The Ewens-Watterson test is one of the first test of neutrality (of no selection). Later came tests such as Tajima's D or Fu, Li's G and many other. Question Can you please make a description of how ...
3
votes
1answer
29 views

Any idea what this red plant is?

I live in South central Indiana, US, and these have just started appearing in the grass in my yard. I just bought this house last fall so I've never seen them. Anyone know what they are? Are they ...
1
vote
0answers
26 views

Why would worker bias sex-ratio toward workers?

This question prompts for explanation on a topic, an interpretation of this topic is given. A simplified question statement is also given at the end for those who do not wish to read. Topic In the ...
0
votes
0answers
11 views

Modeling a patient's parameters (SPO2, HR, BIS etc.) to their effect on the patient

I'm currently using code (C#) I wrote which creates a 3 compartment model to simulate the concentration $C_{p}$ of Propofol in blood plasma using the Schnider and Marsh pharmacokinetic models. I ...
1
vote
2answers
24 views

What is the difference between the neural tube and the dorsal ventral cord?

I was wondering what the difference is between the neural tube and the dorsal ventral cord. I know that the neural tube forms during embryonic development from the ectoderm layer that folds inwards. ...
0
votes
1answer
27 views

Why do people cut back on kilo-calories?

I am learning about specific heat in science and I learned about how the specific heat for water is called a calorie, but that is different to what is on the food label. On the food label, that ...
0
votes
0answers
16 views

What is a good HADDOCK score?

I am using the HADDOCK docking server. I am attempting to dock a protein to some dsDNA. All the energy values stack up, but I'm having trouble interpreting the more specific scores. My HADDOCK score ...
0
votes
0answers
24 views

why selecting cells after gene editing with CRISPR Cas9?

I am new to the CRISPR Cas9 genome editing system and I have the above basic question. Another way to think about this: what would happen if after cells are transfected, the cultures are left to grow ...
4
votes
1answer
69 views

Can you identify this animal?

It was in the bathroom, 2cm in lenght (or so). It has two small antenas on the head. I live on Balkan peninsula, inland.
1
vote
0answers
7 views

How does a higher channel density increase speed of propagation of an Action Potential?

If there is a higher density of sodium channels then there will more Na+ flux in the cell. So it's like trying to pass more material through a pipe and therefore the speed of action potential (AP) ...
0
votes
1answer
51 views

How do I tell if the mosquitos in my New York City apartment can carry Zika?

The species that carries Zika, A. aegypti, is unlikely to be found in New York. However, the related species A. albopictus is prevalent and quite concerning. So this question is focusing on A. ...
0
votes
1answer
42 views

What actually happens to the human body during fasting/starvation? [closed]

I recently came across a UN study which advocated that controlled fasting can be beneficial for the the human body and I am fascinated by stories of wilderness survival against the odds. It piqued ...
1
vote
1answer
61 views

How do harsh conditions cause an increase in the male birth ratio?

I've heard that in harsh conditions more human baby boys are born than girls because a bigger ratio of them will die before reproductive age. But in which aspects of the random gene combination while ...
1
vote
1answer
18 views

Isolating the gene of interest for protein production

For protein production, the gene of interest is inserted in an expression vector and introduced into a suitable host for expression. But how is the gene of interest for the desired protein isolated ...
1
vote
1answer
42 views

What are the characteristics of a living organism? [closed]

It seemed fairly basic at first, and yet I have to ask because even a quick Google search reveals that it doesn't seem to be quite so straight-forward anymore. After more research, I found multiple ...
3
votes
1answer
70 views

Species Identification - small insect

I found a few of these walking in the middle of the night (about 3 AM) on a wall in my room near the floor. They are at most a few millimetres long (no more than 2 I would say). I am living in Poland, ...
1
vote
2answers
52 views

Recessive is Dominant to Dominant?

If a gene has for instance three alleles, p, q, and r, then could p be dominant to q, q be dominant to r, but r be dominant to p? Can a gene that is recessive to one allele not be dominant to another ...
1
vote
1answer
22 views

How do mosquitoes orientate in the darkness?

An annoying mosquito (Culicidae) which kept me awake nearly the whole night lead me to this question. I have heard that mosquitoes can smell CO2 which could help them to orientate in the darkness, ...
0
votes
0answers
16 views

Photosynthetic Absorption Spectrum - Pigment vs. Absorption Spectrum

This is a very confusing question to me that came up while I was studying photosynthesis. Halobacterium has a photosynthetic membrane that is colored purple. Its photosynthetic action spectrum is ...
0
votes
1answer
39 views

How does epigenetics know to mutate which gene in order to survive? [closed]

It seems that during reproduction particular genes are targeted for modification (mutation, deletion, insertion, etc.) given environmental inputs of either or both of the parents. If a creature was ...
0
votes
0answers
53 views

Disposable Soma Theory and the case of the contraposition

According to August Weismann (1889), Kirkwood and Holliday (1979): Because of the evolution of an organism that is segregated into soma and germ cells, soma becomes disposable, and in the face of ...
0
votes
0answers
13 views

Lysis of bacteria by complement system

The complement system creates pores in cell membrane which leads to influx of lots of water thereby causing lysis of bacterial cell. But what I fail to understand is that if bacteria have cell walls ...
1
vote
0answers
20 views

Is it possible that people perceive time differently than others do? [migrated]

All of my life I have been told to be more patient, to stop "racing through life", etc. Happily, I am finally mature enough to accept that as solid advice, but I am curious as to whether it is ...
0
votes
0answers
14 views

How to use MetaClusterTA for binning metagenomic data?

I am trying to use MetaClusterTA (http://i.cs.hku.hk/~alse/MetaCluster/download.html) for binning and annotating my metatranscriptomic dataset. To start with, I do it with a simulated dataset that I ...
4
votes
2answers
29 views

How do I know whether or not a nuclear gene is single copy?

As a part of a phylogenetic study, I need to find a nuclear gene that meets the following requirements: Single copy gene; Highly variable gene; Gene longer than 400 bps; Gene that gives information ...
1
vote
0answers
34 views

Similarity with protein sequence [closed]

I have chosen a protein sequence and I want to record the sequences having similarity more than 85% of the chosen sequence. How can I find it using FASTA?
1
vote
2answers
129 views

Best method to cure cancer as of now? [closed]

I am not talking about chemotherapy or radiotherapy. So, if it exists, what is the best biological technique to cure cancer as of now?
1
vote
1answer
35 views

How to interpret Percent identity matrix created by Clustal Omega?

I did a multiple sequence alignment using Clustal omega. checked similarity for 3 protein sequences : aspartyl aminopeptidase [Homo sapiens], aminopeptidase P (APP) [Plasmodium falciparum 3D7], yeast ...
1
vote
0answers
18 views

What exactly is the time constant of an ion channel gating?

Let's take a channel that does not get inactivated, but is only in open and closed states. I understand what m (activation variable) represents. It's the fraction of the gates open. But what does ...
1
vote
1answer
25 views

Is there any clear relationship between physical characteristics and patterns in the genome?

Given that for example humans have five fingers on each hand, is there a region in the genome with a sequence of five similar subregions, one for each finger? Is the region on the genome that encodes ...
0
votes
0answers
12 views

Developing cDNA for RDT

Eukaryotic genes cannot be inserted in prokaryotic hosts for making recombinant proteins, since eukaryotic genes are split genes and their hnRNA must first be processed to functional mRNA before ...
1
vote
0answers
14 views

Does any specific property decide which DNA strand acts as leading strand template?

Of the two strands of DNA, the one that unwinds in the 3' to 5' direction constitutes the leading strand template, with the other strand of course acting as the lagging strand template. Is there any ...
-1
votes
0answers
12 views

“Body Safe” resins

I've been trying to find a castable resin that is 'body safe' (don't ask why; a friend asked a hypothetical that I then got wayyy to interested in resolving. Take comfort in that it's an entirely ...
1
vote
0answers
9 views

Why do some macaques have redder faces than others?

I'm watching Monkey Kingdom, and I noticed some of the macaques have redder faces than others. Specifically the females, and as the social ladder increases, so does the redness. An alpha female: ...
3
votes
3answers
40 views

Difference between null and recessive allele?

I get that in a single gene locus, an individual can have RR, Rr, or rr as the two alleles ...
1
vote
1answer
37 views

Is it possible to remove one strand of double stranded DNA in vivo?

Assume we do have a double stranded DNA sequence in human cells, say ...ATCGATATCGATATTGCAGAGCATAGCTATAA... ...TAGCTATAGCTATAAGCTCTCGTATCGATATT... Now I want to ...
2
votes
0answers
35 views

Estimated protein size using CDs data [closed]

The number of amino acids in a protein is important to predict their size. I used coding DNA sequence (CDs) to predict the average of the protein size of E.coli k12 from a sample provided by the ...
1
vote
1answer
35 views

Why must DNA be packed into chromosomes during mitotic phase?

Why does DNA have to be packed into chromosomes? Why can't DNA just divide itself evenly?
1
vote
1answer
24 views

How would cloning affect conservation of rare species?

Many species are at risk of extinction, and cloning could be seen as a relatively quick method to produce large numbers of members of the species to aid in conservation efforts, especially if the ...
0
votes
0answers
25 views

What should I do if there's a mistake in my textbook regarding anatomy? [migrated]

Some information in my college level Anatomy and Physiology textbook is about a decade (if not more) out of date? The information does not only cause a lack of understanding, but also encourages a ...
0
votes
1answer
32 views

Amino acids in human cancer cells expose dextrorotation?

I would like to know if the amino acids in the human cancer cells are dextrorotatory or levorotatory. I mean the majority of them. They expose levorotation just like the amino acids in the normal ...
4
votes
0answers
67 views

Does Cas9 require a nuclear localization signal (NLS) for it to work in a Eukaryote?

I'm trying to establish if it's required to add a NLS to Cas9 when expressed (or transfected) in a Eukaryotic cell. Several papers report using a viral NLS, but is it absolutely necessary? Could ...
4
votes
0answers
38 views

Does depolymerisation take place at the minus end of microtubule?

Wikipedia says that Dynamic instability refers to the coexistence of assembly and disassembly at the 'ends' of a microtubule. but Karp's Cell Biology, 7th edition says Dynamic instability ...

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