-4
votes
1answer
88 views

Basic definitions for biology terminology [closed]

I am currently writing a mathematical biology paper, however it is very hard for me to follow the existing literature due to specialized terms. I have tried googling but most explanations are very ...
1
vote
1answer
44 views

Is it possible to use microalgae to produce food and live on it?

i got know microalgea can benifit a lot and it has not less protein and starch , and grows quickly, require less so is it possible to use them for producing food (replace rice and wheat) and live on ...
1
vote
1answer
179 views

What type of mutation causes Progeria?

I'm doing my High School biology final on Progeria, and am wondering what type of mutation causes this disease. I know that the LMNA gene codes for the "prelamin A" protein, and that protein contains ...
3
votes
1answer
160 views

What is the most genetically simple organism except viruses?

What is the most genetically simple organism (except viruses) on this planet? By simple I mean the least number of genes.
0
votes
2answers
94 views

Identifying the inheritance pattern

...
2
votes
1answer
30 views

Difference vector target and genomic target

In Pfu turbo DNA Polymerase AD information sheet (and possibly in many other) different amplification targets are divided in Genomic DNA targets, Vector DNA targets and cDNAs. What is the difference ...
5
votes
1answer
171 views

What about 23andMe's SNP test gives it such bad efficacy as a diagnostic tool?

The recent news about the FDA stopping the google backed 23andMe service selling any more kits got me thinking. I understand the company may have been selling it as a medical tool prematurely, but ...
6
votes
1answer
95 views

Has Colony Collapse Disorder (or its equivalent) been noted in other species?

Colony Collapse Disorder is a well studied phenomenon relating to the decline of bee populations - has this disorder, or its equivalent, been observed in other colony-based species?
0
votes
1answer
349 views

Static in limbs

I have noticed that while sitting in the Sukhasan posture(picture below) for a long time, my feet suddenly become all stiff and i am unable to move it. What I deduce from the experience is that it is ...
4
votes
0answers
268 views

Statistical Coupling Analysis (SCA) to identify coevolved residues: use of ICA [closed]

We've begun to try out the SCA Matlab toolbox (latest version) downloaded from Dr. Rama Ranganathan's website, and, following the included tutorials, would like to apply it to our protein family. The ...
1
vote
0answers
22 views

mixing beer with spirits, increase alcohol content? [duplicate]

I decided to mix beer with vodka hoping it would make me more drunk due to the alcohol content but then remembered the rest ISNT alcoholic and i cant figure out if mixing beer with vodka or other ...
4
votes
1answer
82 views

Is this ventricular tachycardia?

I am investigating the public data of this. Its specification ...
4
votes
1answer
4k views

Under what conditions does the body burn fats, proteins and carbohydrates?

Searching the internet, I have found lots of conflicting information from various fitness sites concerning when the human body burns fats, proteins and carbohydrates. My basic understanding was that ...
6
votes
1answer
94 views

How well do we notice asynchronicity?

I'm stopped at a stoplight and, with nothing to do, my thoughts wander to the timed don't-walk sign that governs any pedestrians who might wish to cross the street I'm driving along. I can see two ...
4
votes
2answers
450 views

Double mutant analysis with null mutants

My professor was talking about double mutant analysis with null mutants, and how double mutant analysis won't work with hypomorphs. I really don't understand the concept of double mutant analysis. ...
2
votes
1answer
63 views

Why is Thermus aquaticus and Taq Pol stable?

What is the molecular basis of the stability of the bacterium Thermus aquaticus and the enzyme Taq Pol it produces ? I have tried googling this but did not get a good answer.
5
votes
1answer
54 views

Is there any evidence telling us what the oxidation state of early earth's atmosphere was?

I ask this question in relation to the origin of life. I realise it would probably be better suited to a geology stack exchange, but it does not yet exist. The Miller-Urey experiment gives a lab ...
1
vote
2answers
396 views

Were early human beings (about 100 - 200 K years ago) far more promiscuous than we are now?

I found that many friends of mine are quite easy in sexual relationship. Ex, I knew a lot of girls went to the night club & met a stranger & brought home to sleep with him even she had never ...
1
vote
3answers
90 views

Definition of species - location of gene

I know that species have been classified on basis of reproduction , DNA similarity , niche, etc. Has there been a classification based on locus of genes ? What are the drawbacks/shortcomings of ...
9
votes
2answers
232 views

Why does the chance of having a baby with Down's syndrome increase with the age of the mother?

Down's syndrome occurs when either the egg or the sperm cell contain on extra chromosome 21. To my understanding, women are born with all the egg cells in place already, so there's no further cell ...
5
votes
1answer
114 views

Mitotic crossover happens in G1?

I was reading this article in wikipedia and came across this : It has been suggested that recombination takes place during G1, when the DNA is in its 2-strand phase, and replicated during DNA ...
1
vote
3answers
453 views

What does orbital mean in orbital frontal cortex?

Orbital frontal cortex is where decisions are made. What does the word orbital there mean? I looked around in wikipedia and never find it.
4
votes
2answers
202 views

Why and how does complexity usually tends to increase through time?

The question of complexity is classic in the very first lectures of evolutionary biology where the teacher usually tries to tell the students that complexity does not necessary increases and that ...
1
vote
1answer
19 views

Cancer history on environment-cancer relationship

I am interested to know how environment-cancer relationship knowledge has developed. I know that all began when Muller first proved that mutation could be induced via ionizing radiation, X rays in the ...
0
votes
1answer
133 views

Does avocado and orange have a common ancestor?

While I'm eating my orange, I felt as if I was eating avocado. It might be genetic manipulations perhaps but it made me think if they have a common evolutionary ancestor. Is there?
2
votes
1answer
218 views

Why don't we have more cone cells (bigger fovea)?

Background Apart from being able to sense color, cone cells are able to perceive finer detail and more rapid changes in images, because their response times to stimuli are faster than those of rods. ...
4
votes
2answers
159 views

Is solving cancer required in order to avoid aging?

When the telomerase enzyme is not active the telomere shortens every time the cell duplicates leading to a reproductive limit (Hayflicks limit). On one hand this is a believed reason for aging. On the ...
2
votes
1answer
77 views

Is there a limit to acceptable brightness for plants?

Can overly bright artificial light harm plants? Is it possible to achieve a level of brightness so high that it does more harm than good to plants? If sunlight can be filtered of infrared light ...
5
votes
3answers
248 views

What are some examples of genes that code for multiple proteins?

The title pretty much says it all. It is widely taught that a gene in a eukaryotic system could produce more than one protein due to post-transcriptional modification, but I do not believe I have come ...
1
vote
2answers
229 views

Epinephrine vs. Adrenaline

Both names are widely used, with what appears to me as a slight prevalence of “epinephrine” in scientific literature and an overwhelming prevalence of “adrenaline” in popular media. Are there any ...
2
votes
1answer
103 views

How HIV Affects and Its Treatment using Combination Therapy

Can someone please help me with the following questions. I've written my specific questions right after the text question. Human immunodeficiency virus (HIV) is a retrovirus. Its genome is a single ...
1
vote
4answers
338 views

Punnett Square Help

In fruit flies, red eyes are dominant over white eyes. Show a cross between two white-eye fruit flies. My question is... How do I know if the white-eye fruit flies are homozygous or heterozygous?
2
votes
1answer
593 views

Excretion of various wastes and water requirement

A common fact is that Ammonia, Urea and Uric acid are the most common excreted metabolites and their removal needs varying amount of water, highest for ammonia (hence suited only for aquatic animals) ...
2
votes
1answer
117 views

Sodium levels and blood pressure

Why does low Na+ levels cause hypotension (low blood pressure). Alternatively, why does excessive intake of Na+ cause hypertension or high blood pressure? From what I understand, there are ...
5
votes
3answers
203 views

How easy is it to carry out de novo sequence assembly?

Today a colleague of mine asked the following question: " Assuming I need to build from 0, a chromosome of a fish, with short reads but no other reference whatsoever [de novo assembly]: ...
2
votes
0answers
72 views

Organisms with the most extreme sensory capabilities? (sight, smell, sound) [closed]

Background It is quite mind boggling to imagine what it would be like to be missing sight, sound, touch, smell, taste etc. Question Which organism holds the record for most extreme sensory ...
4
votes
1answer
178 views

Why isn't Rh disease present in other mammals?

I have read about Rhesus D Hemolytic Disease of the Newborn, sometimes called "Rh disease". It's rare, but it can happen when an Rh+ baby is conceived by an Rh- mother. This raises many questions. I ...
0
votes
2answers
139 views

Chills down the spine with certain music?

I am sure many of us know the feeling of that tingling chill down our spines when listening to certain music. I experienced this most when my younger brother played an emotional piano piece for a ...
4
votes
2answers
278 views

How does the colinearity of the HOX genes determine the body plan of an organism?

I was recently reading about colinearity in the HOX genes that give an organism its high-level body plan (where the order of the HOX genes on the chromosome follow the head-to-tail order of body ...
3
votes
0answers
62 views

Can juice have a higher sugar content after packaging? [closed]

It seems like the orange juice thats been sitting in the fridge for awhile always tastes sweeter than the juice just brought from the grocery store. Can juice ripen in the container ? By that I ...
1
vote
0answers
42 views

RT-qPCR of selected differential expressed genes: which dilutions in calibration curve?

I've seen in MIQE guidelines that calibration curves a needed when performing RT-qPCR. I'll use genomic DNA to perform these calibration curves. My question is that I don't know the range of ...
2
votes
1answer
97 views

How many plants are needed to survive in an airtight chamber?

How large a garden do you need if you are to survive on them producing enough oxygen in a closed chamber? And which are the most effective plants?
1
vote
1answer
58 views

Removing Sugars Bound to a Protein

I recently purchased some Maltose Binding Protein and as the name suggests this protein binds to maltose. The problem I have is the protein arrive with maltose bound. I know this through native mass ...
1
vote
0answers
17 views

Are there any differences between qRT-PCR and GEO (microarray data from NCBI) regarding dealing with internal control genes?

As we know, when we do qRT-PCR, the two most commonly used methods are absolute quantification and relative quantification, both the methods are involved in dealing with normalization of house-keeping ...
15
votes
1answer
167 views

Haidinger's brush: Is this a by-product of the eye's physics, or are there any evolutionary grounds for it?

The human eye is, very subtly, sensitive to the polarization of light. This is an effect known as Haidinger's brush (see Wikipedia article of this name). What, if anything, is known or at least ...
3
votes
1answer
110 views

Why do animals only eat some parts of their food?

For example monkeys/apes only eat part of a fruit and then throw the rest. Cats (big and small species) only eat some parts of their prey and then they abandon it. Humans on the contrary leave as few ...
2
votes
1answer
286 views

Is tongue rolling genetic?

Is the ability to roll your tongue or not truly inherited or genetic? What I have gathered from school has been contradicting with evidence I found elsewhere.
4
votes
2answers
2k views

The number of nipples (breasts) a species has?

Only mammals have mammaries and mammary glands. What evolutionary factors determines the number of mammaries (nipples/teats/breasts) a species has? Is it always an even number?
1
vote
1answer
2k views

Cats, Dogs and Bears - how are they related?

What is the ancestral relationship between cats, dogs and bears? I presume they are more closely related to one another than other paraphyletic clades of mammal. Which came first? What did their ...
4
votes
3answers
3k views

Why do yeast ferment Equal sweetener

I had my students conduct a fermentation experiment manipulating sugar amounts (number of sugar packets in solution) and measuring CO₂ production via capture in a balloon and measuring circumference ...

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