0
votes
1answer
17 views

Can the Staph streak method be used for culturing Neisseria on blood agar?

What I learned in class: Normally chocolate agar is needed to grow Haemophilus and Neisseria. The Staph streak technique can be used for culturing Haemophilus on blood agar by allowing the Staph to ...
6
votes
1answer
42 views

Chromosome picture, how to interpret?

In this guide i was reading for annotations, there is a diagram of chromosomes of D.mel, I am confused as to why the chromosomes are all attached to one another, is this picture taken in a certain ...
1
vote
0answers
15 views

Linkage Disequilibrium in GWAS

I see a lot of studies on GWAS not filter out for linkage disequilibrium or even make the slightest mention of it. Why is this the case? I would imagine that you want to keep SNPs that are only in ...
3
votes
0answers
40 views

Neural coupling between Pinsky-Rinzel (reduced Traub) neuron with a Wang-Buzsaki neuron?

I have read two papers related to modeling neurons. The first one is the paper by Pinsky and Rinzel and the second one by Wang and Buzsaki. The first mentioned neuron model is a excitatory neuron ...
0
votes
1answer
41 views

Can you measure plasma glucose with a regular glucose meter?

I'm wondering if plasma glucose can be measured with a regular glucose meter and strips like this. I know these meters are normally used to measure whole blood glucose, but can they measure plasma ...
0
votes
0answers
28 views

Some kind of better oxygen-transport protein or something… Can you help me find it?

I remember reading about artificial or man-made, oxygen-transport protein that is somehow an improvement on hemoglobin, and that it is possibly immune to sickle-cell anemia, or something... But I ...
6
votes
3answers
57 views

How animals know which is carnivorous and herbivorous?

Deer ran away from tiger or cheetah, but not from giraffe or zebra. where did deer learn this? How animals know which is carnivorous and herbivorous?
1
vote
0answers
47 views

Consuming animals by slaughtering vs injecting barbiturates?

In "Least painful way to die" we get an answer ... Companion animals (e.g., dogs and cats): injected barbiturates are recommended Laboratory animals (e.g., mice and rats): injected ...
4
votes
3answers
166 views

Gametes of two different species

I always wondered why gametes from two different species dont fuse together to form an offspring. eg a donkey (sperm) and a female dog (egg) I know this is not possible but I'm just curious.
5
votes
2answers
101 views

Proteins that give color (without fluorescence)

Is there proteins that have strong color, that could be seen without the need of UV and with naked eyes (with white light) - in mammalian cells? Searching for reporter, something like GFP, but that ...
4
votes
1answer
121 views

How does LCR compare to Assembly PCR

The question pretty much explains itself. How do the two methods compare? I've always used Assembly PCR but the method is prone to mistakes and I'm curious how it compares to Ligase Chain Reaction ...
10
votes
2answers
6k views

Why is PEG important for efficient yeast transformation?

One way to do an yeast transformation is by using lithium acetate, a single-stranded carrier DNA, and PEG (1). I was wondering why is the polyethylene glycol important for the efficient ...
3
votes
0answers
29 views

Is the number of stamens always 9 for geranium?

We are studing in class the reproduction of plants. We start the lesson by observing some components of flowers, it was the Géranium. First of all we start counting the number of sepals , petals and ...
0
votes
0answers
22 views

What is a “NuMA protein”?

I just got out of a lecture on mitosis and this part was incredibly confusing. After searching my textbook it doesn't cover it that well either. The professor mentioned a NUMA protein that is ...
1
vote
1answer
39 views

Limited space for animals - how is that bad?

I am writing an English paper wherein I have to appeal for change in the way humans treat wildlife. I was initially given a situation wherein I took a ferry in a certain area and saw a dead baby ...
1
vote
1answer
25 views

How does inbreeding depression cause infertility?

My textbook states that repetitive self-pollination in the plants cause inbreeding depression which causes infertility thus plants develop techniques called outbreeding devices to encourage ...
1
vote
0answers
35 views

Importance of organic chemistry in biochemistry/molecular biology? [closed]

I'm halfway through my biochemistry and molecular biology degree in Australia and i'm concerned about a lack of organic chemistry. My friends studying biochemistry back home in Canada take units upon ...
0
votes
0answers
25 views

Determining the percentage of the query of an alignment from a BLAST output

Given this BLAST output, how can I determine the percentage of the query sequence in the alignment? I know that it's also referred to as 'query cover' but I can't seem to find anything online that ...
0
votes
0answers
14 views

Over what range do Thyroid Stimulating Hormone (TSH) levels tend to fluctuate over the course of a day?

I understand that the majority of doctors consider the TSH test "the gold standard" for measuring thyroid function (examples stating that literally are here and here). The reference range for what is ...
1
vote
1answer
28 views

How does the partial pressure of oxygen affect mental focus?

On this Wikipedia page it says that lower oxygen levels can cause light-headedness. Is there evidence that higher partial pressure of oxygen can improve mental focus?
8
votes
4answers
2k views

What is the difference between a circular and a cat's-eye pupil?

I've been to local zoo the other day and one lizard caught my attention: its pupils are circular, which, I thought, is not usual for reptiles. Turns out it is, but now I can't find any explanation on ...
4
votes
1answer
47 views

Multistability in the lactose ultization network

Reading the paper here, I'm confused about the production of figure 4d. The method of production is detailed in the supplementary information under the heading "Theoretical phase diagram". ...
0
votes
1answer
22 views

Do restriction enzymes on read 3' to 5'?

Every chart of palindromic restriction enzymes I've seen lists their restriction sites from 5' to 3', something like this: EcoR1 cuts GAATTC between the G and A: 5' NNNGAATTCNNN 3' --> ...
1
vote
0answers
47 views

Measuring a plant's electric activity any instructions where to place electrodes?

I would like to measure a plant's electric activity / voltage, I've looked online to find out where to place the electrodes and what type of electrodes to use but they seem to very wildly. Any ideas? ...
0
votes
0answers
43 views

Does embryonic development mimic (partly at least) the evolution of organisms on earth?

What do we know about the forces/mechanisms which lead to this seemingly "fast forward" evolution stages of the embryo? What are the theories dealing with this idea?
-1
votes
0answers
37 views

Is there a way to tell what the surface of a planet is like? [migrated]

Kepler-442b I'm doing a project in which I need to find a planet within our galaxy that might be habitable. I found this planet that is within its solar systems habitable range, and due to research I ...
10
votes
4answers
5k views

How does sodium in one's diet affect blood pressure?

Due to high blood pressure, my doctor has recommended I go on a low-sodium diet. So, that got me wondering what it is about sodium that drives this recommendation? What does sodium do to a body ...
13
votes
1answer
77 views

Why does mint oil feel cold on the skin?

When putting (japanese) mintoil on the skin it produces a cool feeling. You can experience this, when adding it to your bath or using a spray with mint oil on your skin. The cool feeling occures ...
6
votes
0answers
39 views

Basic Modelling in Quantitative Genetics

I am pretty bad in thinking quantitative genetics models. I am trying to get some basic understanding of modelling the evolution of a quantitative trait. I am therefore asking for help to analyze a ...
3
votes
1answer
48 views

Myopia as a microscopic superpower?

A few years back my Physics professor made a joke that his Myopia/Nearsightedness gave him a "superpower" that allowed him to see close objects much more clearly than someone with typical eyesight. ...
4
votes
2answers
49 views

A doctor might give bicarbonate (HCO₃¯) to a patient who is breathing very rapidly. What is the doctor assuming about the patient’s blood chemistry?

The answer is: The doctor is assuming that the rapid breathing is the body’s response to low blood pH. (Source: Campbell Biology) But this answer doesn't make sense. Why would the doctor give the ...
11
votes
2answers
324 views

What is the explanation for the smaller number of tRNA than codons?

Translation, or decoding, of the four-nucleotide language of DNA and mRNA into the 20–amino acid language of proteins requires tRNAs and enzymes called aminoacyl-tRNA synthetases. To ...
-1
votes
0answers
20 views

Regarding benzoic acid and its effects

One of the users on the chemistry s.e. mentioned that when benzoic acid forms in the body in response to other chemicals it might have a mutating effect on one's DNA. Is this true?
6
votes
2answers
661 views

Why is a slow worm not considered a snake?

Slow worms are considered lizards as opposed to snakes, both are reptiles. Now I get that there are traits that distinguish them (eye lids, ears ...). But snake species themselves vary already quite a ...
1
vote
1answer
20 views

Human population growth - where can I find the data?

Out of curiosity, I'd like play around with data of human global demography. Where can I find data that describe the "per region (per continent for example) population size" versus time since the ...
1
vote
1answer
19 views

What causes muscle spasms?

What causes muscle spasms with muscles that are not in the heart ? Could it be some sort of stimulus overload that causes a massive contraction?
-1
votes
1answer
30 views

What does a read simulator do?

There are various software for simulating reads for Next Generation Sequencing. Can anyone tell what exactly is done by a read simulator software
3
votes
0answers
24 views

Multiplex PCR, shorter amplicon inhibiting longer amplicon?

I want to run multiplex PCRs for my genotyping, with a primer pair targeting my construct and a primer pair targeting some housekeeping gene (sort of a built-in control). I designed the control ...
4
votes
0answers
22 views

What are those visual and auditory reflex controlled by the midbrain?

The midbrain is a centre for certain visual and auditory reflexes. But what are those reflexes exactly? My study book says that these reflexes are, e.g., responsible for moving the eyes to view ...
7
votes
2answers
487 views

Why does sexual selection evolve beautiful features?

First question here. I have a very raw understanding of sexual selection: Say a group of females of a certain species "likes" some feature of a certain groups of males; by "like" I mean some ...
0
votes
1answer
29 views

How does cancer of the larynx (laryngeal cancer) affect the respiratory system?

The larynx is part of the respiratory system and is responsible for producing sound (our voices). My question is how cancer in the larynx (voice box) affect the respiratory system overall? I ...
2
votes
2answers
43 views

What is the difference between meristem and bud?

Keep reading both terms quite frequently while studying plant physiology. I did some research trying to establish their differences and I learnt that meristems are undifferentiated cells that can ...
4
votes
1answer
35 views

Evolution of dominance of alleles

Can someone tell me where can I find detailed text about mechanisms of evolution of dominance? Or, if it is possible, I would be grateful if someone will tell me about them here.
4
votes
1answer
55 views

Are there any online resources one can use to access raw clinical trial data without having to contact those involved in the study?

I want to do some statistical analysis and I have a preference for real data so I was wondering if there's somewhere I can get such data for free without a heap of bother in phoning other those ...
2
votes
1answer
33 views

Why doesn't mitochondrial DNA accumulate damage over successive generations?

From what I recall, mitochondrial DNA is very susceptible to damage from oxidative stress because it is a site where free radicals are generated and their DNA isn't packed into chromatin like nucleic ...
1
vote
2answers
72 views

What is the importance of urea in mass spectrometry?

What is the importance of urea in mass spectrometry? We use 8M urea to FASP our proteins prior to mass spectrometry. What is the significance of using 8M urea? and how does it affect the proteins?
1
vote
1answer
37 views

Feeling of spicy

I have done a survey on my friend When everytime they eat something spicy, They will eat ice or drink icy water. First, Mostly they feel nothing but a cool sensation. However when they finished, they ...
0
votes
1answer
16 views

Using Jpred to predict secondary structure

I'm trying to use Jpred to predict secondary structure for a protein sequence. When I run J-pred, I get a bunch of hits from PDB. I've also noticed these 'hits' are the same name as the templates i ...
-1
votes
1answer
30 views

Why Insect bites are itchy rather than pain? [closed]

i don't understand if some thing bites or hurt we feel pain, but its differ for insect bites, why so?
4
votes
1answer
3k views

Applying saliva to mosquito bites

Is it true that; when you apply your own saliva to a mosquito bite it would stop itching ?

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