3
votes
1answer
17 views

What class of histone deacetylase (HDAC) inhibitor is sodium valproate (VPA)?

VPA is a known HDAC inhibitor. But I cannot find what class it is. What class is it? And is there any method of finding an answer better than floundering with Google?
1
vote
1answer
23 views

Why some muscles have more tendons than others?

Very interesting examples to me are Trapezius or Latissimus - they both have places with more tendons than muscles. Taking into account that now they contract weaker and slower with all these tendons, ...
3
votes
1answer
31 views

Do human neurons in a petri dish do different things from chimpanzee neurons

I want to know if qualitative experiments have been done growing chimpanzee neurons and human neurons in vitro and have any differences emerged, such as the amount of connections per neuron or ...
1
vote
1answer
29 views

Gastro-intestinal physiology reference

I am a physicist but I have always wanted to understand how my digestion takes place in as much detail as possible. I have no idea about books or reference on the subject of Gastro-intestinal and ...
2
votes
1answer
41 views

What are the minimal chemical requirements for a food which we all can eat? [closed]

I've been puzzled by the following though experiment for the past few days: I want to make my own food from scratch, but I do not know where to start from. I want to be 100% sure that what I eat will ...
1
vote
1answer
50 views

What is the functional significance of the difference in cardiolipin/cholesterol ratio in different membranes?

I have read somewhere that the plasma membrane has little cardiolipin but excess cholesterol whereas the inner mitochondrial membrane is rich in cardiolipin and has little cholesterol.I just wanted to ...
2
votes
1answer
46 views

Pectinase Enzyme Assay

I am working on pectinase enzyme assay. I incubated 900 ul of substrate for 10 minutes in the water bath, followed by adding 2ml of DNSA reagent, then 100ul of enzyme extract added finally i read the ...
2
votes
1answer
34 views

Is this a plant, mushroom-fungi?

It was soft and covered in flies. My guess is fungi.
3
votes
0answers
32 views

Do I need to use the same WT C57BL individual for back-crossing or can I use a new one for each generation?

I've just received heterozygote C57BL mice from COMP and I need to start back-crossing them. I've read many colony management protocols, but couldn't understand if I need to use the same WT mouse for ...
3
votes
2answers
37 views

EM Brainwaves VS Brain Wave (EEG) [closed]

The brain purportedly produces very weak EM waves. EEG is a method of measuring electrical brain activity, it has classifications for the types of brain wave it can detect: Theta, Alpha, Beta, Gamma ...
8
votes
1answer
185 views

Can anyone identify this bird?

Can anyone identify this bird: it looks like a zebra finch but they are not native to UK are they? Photo taken from my garden in Shoreham, West Sussex on 16/8/2014.
5
votes
4answers
104 views

Why do fat people tire quickly?

Fat people have a large amount of calories (energy) stored, but I have noticed all time when they do physical activities they get tired fast in comparison to fit people - why does this happen?
4
votes
2answers
36 views

Compatibility drugs info

Let's suppose that I take a DrugA for ProblemA and then I got this ProblemB and started to take DrugB. Are there general rules I can look up to figure out whether I can take DrugA & DrugB ...
6
votes
2answers
87 views

Why does replication require primers while transcription does not?

In transcription, there is no need for any primer. I guess the basic mechanism of DNA polymerase & RNA polymerase is the same. So why does replication have the need for a primer?
1
vote
1answer
43 views

What are the dimensions in angstrom of bacteria? [closed]

I'm going to take a picture of a bacteria but I am unsure how large it is. What are the dimensions in angstrom of bacteria?
12
votes
3answers
2k views

Why is high fructose corn syrup unhealthy?

I understand that high fructose corn syrup was found to have detrimental effects on peoples' health. Why is this so?
6
votes
1answer
52 views

Why ml scale blood retrieval is required to run a blood test?

Substances found in blood are present at microscopic scale and tend to be invisible to the unaided eye. Why is a whole vial of blood (at ml scale) is required to assess the presence and concentration ...
3
votes
2answers
56 views

positive and negative feedback

I want to know more about positive feedback in gene regulation and what the different between positive and negative feedback is and the similarity.
4
votes
1answer
37 views

Can the negative afterimage appear only if there is light or is it possible in darkness?

Reading the following paragraph: After staring at the red and blue shamrock, you saw a green and yellow afterimage. Opponent-process theory proposes that as you stared at the red and blue ...
3
votes
1answer
31 views

What is a good identification key for European mushrooms?

I live in the Netherlands, and I am looking for an identification key for mushrooms. Are there any keys you could share?
4
votes
0answers
27 views

Why are recombination rates increasing in mammals?

I have recently become fascinated with an awesome topic in biology and evolution that I feel is rarely covered in biology courses. That is, rates of meiotic recombination, or the the amount that an ...
3
votes
0answers
19 views

Is there a more updated version of the book “Genome?”

I read the book Genome by Matt Ridley for my AP biology course. I found it fascinating, although it seems another book must have been written on the topic since 1999. Anything you can recommend?
2
votes
1answer
29 views

Percentage of mutations caused by radiation?

Consider a gamete in a typical human being. In the interest of being specific, let us say that we're talking about a typical ovum in a typical middle class woman living in a developed nation. What ...
2
votes
1answer
70 views

How much time does it take a human body to replace all of its atoms?

Mikel Vsauce (Vsauce youtube channel) said in his video that it takes about 5 years for the body replace all of its atoms, while in asapscience youtube channel they are claiming that it takes 10 ...
1
vote
0answers
27 views

How do you derive the differential equation for a protein in a cellular model? [closed]

For a cellular model once can use ordinary differential equations to show the change in time of the protein inside a cell. How do you derive such a differential equation for a given protein?
1
vote
1answer
47 views

Do human anal glands have any function?

Anal glands in all kinds of animals play a range of diverse functions - providing fat for preening feathers or waterproofing fur, generating distinct scent, even repelling predators. None of the ...
1
vote
0answers
18 views

Is there a classification of species based on number of different cell types?

The human body has around 200 different types of cells, according to my brief internet research. How does that compare to other species? Is there a classification of species based on that, i.e. number ...
2
votes
1answer
66 views

Mitochondria - are they really separate organisms that once merged into eukaryotic cells?

Theoretically, mitochondria are said to be a separate organism that is concerned with its own life and its own processes. In fact, it even duplicates individually. I know a similar question is here ...
12
votes
1answer
620 views

Is there any relationship between heartbeat rate and life span of an animal?

Is there any relationship between heartbeat rate and life span of an animal? Do they belong to a cause-and-effect relationship or are they both caused by some phenomenons or a common cause?
15
votes
2answers
4k views

Why isn't vomit corrosive?

Vomit comes from gastric acid, right? And in gastric acid there is HCl and HCl is corrosive (strong), how come when I vomit, it doesn't destroy things that it (as the vomit) hits (such as floor, ...
4
votes
1answer
588 views

Help me Identify this Spider

This red spider has set up a web in my yard, in South Eastern, Texas, United States: The spider itself is about an inch long (2.5 cm), and is predominantly red to brown in color, with red legs, and ...
1
vote
0answers
36 views

Human body control? [closed]

What can we consciously control in our bodies besides our muscles and brain (thought, memory, etc.)? Is the notion Bio Feedback related to this matter? EDIT: I mean I can move my muscles at will but ...
1
vote
1answer
42 views

How did the Human Genome Project Sequence DNA [closed]

There are quite a few methods of sequencing DNA. What method was used (or used most often) to sequence the human genome in the Human Genome Project?
2
votes
1answer
55 views

Using RNA-seq to compare gene expression across patients instead of between Control and Experimental conditions

I am working with RNA-seq data from the Cancer Genome Atlas TCGA and I have been reading about how people have compared gene expression levels measured by RNA-seq. Many of the papers I have read talk ...
5
votes
1answer
76 views

Where can I find the pMON7124 plasmid sequence?

I need the map of the pMON7124 plasmid. As this is not easy to find, I welcome any hints.
6
votes
1answer
96 views

DNA extraction from agarose gel

Because DNA is soluble in water, is it possible to extract PCR product by dissolving excised gel containing the DNA band of desired length in water, mashing the gel piece with a pestle, centrifuging ...
0
votes
0answers
27 views

Do women produce a molecule at six weeks of pregnancy? [duplicate]

Is it true that women produce a molecule at six weeks of pregnancy? It's rumored as a special molecule that has a lot of power for the baby. If I'm wrong about this, please prove me. And if I'm ...
5
votes
3answers
105 views

What is the point of having evolved two nostrils?

How would having two nostrils be advantageous to your sense of smell or your ability to breath? I already hypothesized that either one of the nostrils could act as a back up for when another gets ...
3
votes
2answers
49 views

In practice, do fishes die from old age?

I was watching sea birds eating fishes and wondered if fishes actually died from old age, or if they are all eaten before this can happen? I reckon some big predator fishes must be able to live long ...
2
votes
2answers
44 views

What does this Barbary Macaque facial expression mean?

A girl pretended having a piece of food in her hand and pointed it to a Barbary Macaque in Gibraltar. As a response he made this facial expression to her. What does this mean?
3
votes
1answer
33 views

Can a plate with incompletely filled LB agar be used?

I am falling short of LB agar plates and I have a plate with less LB agar poured. I meant, the plate is not fully filled with the agar (it was the last plate I poured the medium into). Some part of ...
8
votes
1answer
211 views

Can a bacteriophage be used to treat bacterial diseases?

Some bacteriophages reproduce using the lytic cycle which ends with the destruction of the host bacterial cell. I was wondering if theoretically this could be used theraputically to treat bacterial ...
2
votes
0answers
19 views

Assembly reconciliation

We have some bacterial genomes that were assembled using Spades, they were sequenced with and IonTorrent PGM. There are many assemblers and they give different results. I was interested in a tool ...
3
votes
0answers
24 views

A Genetic linkage problem [closed]

I have recently switched from electronics to computational biology. So having some hard time with my homeworks. Can someone guide me on this problem? Consider 6 genes A, B, C, D, E, F, G. Some ...
2
votes
1answer
32 views

What is the biding site code recognized by the parts of the spliceosome

Another question about another Youtube video. At 0:50, the splicing process begins to remove the non-coding section of the DNA (intron), so the different parts of the spliceosome attach to the borders ...
1
vote
2answers
49 views

Periodic Muscular Growth in Humans

If a healthy human is at a certain muscle state and then experiences muscular atrophy solely due to disuse/lack of exercise, is it easier to gain that muscle back than if the human had never reached ...
6
votes
1answer
37 views

What regulates the timing of the motion of molecular machines during DNA Replication?

This question is about this video I found on Youtube. I just want to know what is the mechanism which regulates the timing of motion of the parts of these molecular machines. I know that those big ...
4
votes
1answer
56 views

DpnI over-digestion

We have a long protocol that we are optimizing that includes DpnI digestion of a PCR product (to remove any of the template DNA if it's methylated, and while we're not certain in the blind tests, ...
4
votes
3answers
69 views

How does strength of a pulse related to EKG(ECG)?

There are variabilities in the heart rate as well as strength of heartbeats. I want to know if one can predict which heartbeat will be strong or weak based on the corresponding EKG/ECG signal. I am ...
1
vote
0answers
16 views

What are the benefits of statins in terms of prolonging life?

Recently the UK government suggested that all adults over the age of 50, without exception, would benefit from taking statins. I have an elderly female relative who may, or may not have had a minor ...

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