0
votes
0answers
4 views

O-Group names of Salmonella serotypes?

What liposaccharides are represented by the O-group designations of Salmonalla serovars in the Kauffman-White classification scheme? I mean to ask, how do the numbers in a Sal serovar (1, 9, & 12 ...
1
vote
1answer
352 views

Why do orcas eat only the tongue of whales, liver of sharks, etc.?

I noticed that although killer whales are clearly the top predator living in the present oceans, some of them appear to be very picky with their meals. After spending hours hunting down a whale, ...
1
vote
1answer
25 views

What is the reason for 'microcytic' anaemia?

I know the causes for microcytic anaemia are Fe deficiency, prolonged inflammation, Thalessemia, Sideroblastic etc. All these logically point to a decrease in Haemoglobin synthesis - either Haeme or ...
1
vote
0answers
7 views

Names for the degrees for symptoms from drought (or other damage) done to trees

Looking out my window, I see trees suffering from drought. I once knew the name for the degrees visible, but I have forgotten and can't find it on the net. One level was the tree being completely ...
0
votes
0answers
5 views

How can I perform a 1:1 sequence-structure alignment for a pdb template dimer and homologous dimer sequence?

I have: 1. A PDB dimer protein structure template of a real solved protein. 2. An unsolved, but highly homologous dimer protein (>90% sequence identity.) How can I use MODELLER to make a theoretical ...
-1
votes
0answers
9 views

Is there a way to convert/export track files (.trc file) generated from Media Cybernetics Image Pro Plus to .mat file type?

I am trying to export these files so that they can be used with a matlab based automated behavior classification software JAABA. At the very least I would like to figure out a way to read the format ...
0
votes
0answers
11 views

How is the acetone method different from QB buffer for extraction of plant protein?

I primarily work on animal tissue but I thought of running an SDS-PAGE for plant tissue just for fun. I searched for some protein extraction protocols online and I don't know which one to choose. One ...
1
vote
1answer
24 views

Amino Acid requirement + intake in relation to diet + meat type

I was arguing with a friend: I said: the Yulin festivals cannot be condemned by western culture, as we also kill animals in equally cruel ways. She said: not only is it cruel, but the dogs (and ...
0
votes
2answers
32 views

Spatial dimensions for an animal

I'm reading a review paper. They say: The position of an object in head-centered coordinates (that is, relative to an animal's head) can be defined along three axes: the medio-lateral (radial) ...
0
votes
0answers
22 views

How does DNA Polymerase make an error?

It is said that DNA Polymerase mistakenly places an incorrect nucleic base for every billion base pairs being copied. How exactly does DNA Polymerase accidentally insert a wrong nucleic base? ...
4
votes
2answers
69 views

Does a plant have to have leaves to produce fruit?

Is it possible that a plant can still produce fruit, even though it may not have leaves? Are there any plant species that can produce fruit without leaves?
-1
votes
0answers
11 views

How can I grow seedless strawberries

Many people with diverticulitis are under the impression that they can't eat foods with seeds. Although this does not seem to research based the practice seems to persist. I want to know how I can ...
0
votes
1answer
17 views

ExAC Browser: What does a “dubious variant annotation” actually mean?

I wonder how a "dubious" variant annotation is exactly defined in ExAC. I couldn't find any further information neither at the variant's page nor in the FAQs. [EDIT] Link to ExAC browser
1
vote
0answers
41 views

Why did we evolve to control our breath?

I had this question in my mind and tried to think of why we would evolve to be able to control our breath. I remembered the Aquatic Ape Hypothesis, which makes a lot of sense and would explain it, ...
0
votes
0answers
23 views

Deletion of codons at the start of a sequence in preparation for heterogeneous expression. Why?

I am reading a patent where they isolate a gene from cDNA constructed from RNA extracted from plant matter. The subsequent step (in preparation for heterogeneous expression in E Coli.) puzzles me: ...
6
votes
1answer
67 views
+50

What makes worms' eggs float or sink?

In parasitology, while examining the stool sample, one important thing you do is test whether the eggs float on water or sink. We never did that since our coursework limits itself to microscopic ...
-3
votes
1answer
36 views

Can you naturally change your DNA that's passed to your offsprings? [on hold]

Is it possible to change the genes that you'll pass on to your offsprings by natural activity and behavior. For example if you do body building for quite a long time build strong muscles then would ...
3
votes
1answer
98 views

Glycerol 3-phosphate nomenclature

Why is Glycerol 3-phosphate named in such way? Shouldn't it be named as Glycerol 1-phosphate by proper IUPAC- nomenclature?
1
vote
1answer
68 views

True or False: Dideoxynucleotide sequence analysis Question

True or false: Dideoxynucleotide sequence analysis is a template-directed method that makes use of chain terminators that stop DNA synthesis because they lack a 2'OH group. The answer is false. ...
1
vote
1answer
16 views
+50

Which ingested allergens can be transferred to a partner via bodily fluids?

Can some allergens, such as peanut traces, appear in bodily fluids (saliva, sweat, semen, vaginal secretion) after ingestion? I would like to know in particular intake of which allergens should be ...
0
votes
1answer
271 views

0.1 M sodium citrate in 10% ethanol and DNA solubility

I understand how DNA precipitation works in the presence of salt (such as 0.3 M sodium acetate or 0.2 M sodium chloride) and alcohol (30 ~ 50 % isopropanol or 60 ~ 75% ethanol) However, in the Trizol ...
15
votes
2answers
137 views

What are the main mechanisms of interaction between the nervous and immune systems?

We know from pop science that our psychological states have an effect on our immune systems ("worrying ourselves sick", etc.), but what are the actual mechanisms through which our nervous systems pass ...
1
vote
1answer
93 views

How much do crocodiles eat`?

How much do crocodiles eat? The closest I found to an answer was on german wikipedia, where it says that adult nile crocodiles eat "only about 50 full meals a year." While interesting, without knowing ...
0
votes
0answers
4 views

Feedback mechanisms for the dynorphin-kappa opioid system?

(this is all happening in the brain). Also it's best to go context-first I think (1) Normally if you take an agonist drug that hits a receptor "x", eventually the brain will downregulate the density ...
0
votes
0answers
8 views

What is the difference between an uncompetitive, noncompetitive, and mixed inhibitor?

I can't seem to find a good resource online that clearly outlines the difference between an uncompetitive, noncompetitive, and mixed inhibitor (I understand competitive inhibitor though). More ...
5
votes
1answer
45 views

Is this a firefly?

It glows without interruption. This photo was taken near Barcelona, Spain. Thanks in advance.
1
vote
1answer
20 views

Japanese Crab Identification?

I saw a crab walking home from work the other night. We're by a river, but I was probably 500 feet away from the river when I saw this one. I apologize for the image quality, all I had was my terrible ...
6
votes
0answers
88 views

Identification of a mammal in cage

This unidentified animal was trapped in northern part of Kerala State India. Following loss of domestic fowls and suspecting toddy cats a trap was placed and this unidentified animal was trapped. No ...
0
votes
1answer
30 views

How well do Eppendorf cups seal?

I am considering to send some samples overseas in Eppendorf cups. They are the standard plastic cups of 1 to 2 mL capacity. Of course they may tip over during their journey and I'd like to know how ...
0
votes
0answers
33 views

Why is sex pleasure giving activity but not childbirth?

Asking from an evolutionary viewpoint. Sex is a pleasure giving activity so that it encourages reproduction and spreading of genes. But childbirth ,the most crucial part of the reproductive process, ...
5
votes
2answers
113 views

Is it possible to have different genes in different parts of our body?

I want to understand genetic mutation specially in the context of multicellular organisms like humans. I studied biology only till high school and I can’t fully understand wikipedia pages on this ...
4
votes
1answer
74 views

Can the human body create glucose out of fat?

I read conflicting views about whether or not the human body can create glucose out of fat. Can it?
3
votes
3answers
43 views

Needleman Algorithm for Optimal Alignment of two Amino Acid Sequences

I want to compute the optimal alignment of two amino acid sequences as per the following definition from a patent: "The percentage of identity between two peptidic or nucleotidic sequences is a ...
1
vote
0answers
19 views

Insect behavior - why do they land on my window and refuse to move [on hold]

Why do so many insects, particularly bees, land on my window screen and refuse to move even if I hit the window or the screen to make it go away. They do this to my car window too. I see no reason for ...
0
votes
0answers
14 views

Why can dogs not have a pink(ish) coat color?

In yellow dogs, there is a mutation in the MC1R gene which leads to a nonfunctional receptor. This leads to the production of pheomelanin which is pink/red (depending on concentration) instead of ...
-1
votes
0answers
9 views

What's the difference between “mixing” and “combination” of chromosomes? [on hold]

What's the difference between "mixing of chromosomes" and "combination of chromosomes" ?
1
vote
1answer
24 views

Ways to monitor enzyme kinetics with very fast time resolution?

I'm interested in any way to do time-resolved study of enzyme kinetics. I am studying some physical variables that may affect kinetics, but I want to study how quickly they take effect, and how long ...
20
votes
1answer
3k views

Why do mints make your mouth feel cold?

Why do mints make your mouth feel cold? And specifically, why does your mouth feel so cold if you eat a few mints and then drink a glass of cold water afterwards?
3
votes
2answers
65 views

Do any terrestrial herbivores use auditory crypsis for predator avoidance? [on hold]

Some terrestrial predators "stalk" their prey: they sneak up on it slowly, maintaining a low profile, while keeping as close to silent as possible. This makes sense from an evolutionary perspective: ...
17
votes
4answers
2k views

Book recommendation on population/evolutionary genetics?

I have recently been involved in collaborations that require me to model the population genetics of eukaryotic populations. I fear I may either be "re-inventing the wheel" or making conceptual ...
0
votes
0answers
11 views

Is there any technique other than restriction enzymes to introduce staggered cuts into DNA?

I'm curious about introducing staggered cuts into DNA, but wonder if there is a way to do this in vivo in E. coli, as I heard introducing restriction enzymes on a plasmid would end up just shredding ...
7
votes
4answers
13k views

Why do men have a higher hematocrit (red blood cell count) than women?

The hematocrit, also known as packed cell volume (PCV) or erythrocyte volume fraction (EVF), is the volume percentage (%) of red blood cells in blood. It is normally 45% for men and 40% for women. so,...
4
votes
1answer
38 views

Cancer biology: Can tumors form from cells that are genetically identical to non-cancerous cells?

Can a tumor begin to form without any genetic mutations? I'm specifically interested in a tumor which could later lead to cancer.
0
votes
0answers
19 views

Is there good evidence to justify drinking vitamin supplements for health benefits? [on hold]

I stumbled upon this question when trying to decide if I should keep drinking fish oil pills. Technical papers in biology are outside my scope, though, and I don't trust mainstream online articles ...
-1
votes
0answers
22 views

When frozen rain moves up and down within an anvil cloud, _____ is formed [on hold]

When frozen rain moves up and down within an anvil cloud, _____ is formed. A. hail B. snow C. thunder D. lightning
1
vote
2answers
105 views

Why aren't there any transitional animals today?

You have probably heard this question before and in different formats. Usually, it is used as a "proof" to disprove the theory of evolution. I understand that the apes we descended from are not the ...
2
votes
1answer
32 views

Why do blue jays eat my cat food?

We buy some run of the mill big-box store cat food. Over the last several weeks, I've observed a blue jay landing on the cat food dish, taking a piece or two, and flying off with it. I assumed it was ...

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