12
votes
2answers
290 views

In a tumor, why hypoxic regions have access to glucose?

The Warburg effect is ubiquitous in cancer. It consists of the upregulation of glucose uptake, glycolysis, and subsequent lactate secretion, sometimes by over 200 times, in cancer cells as compared to ...
1
vote
1answer
67 views

Short dated spontaneous ringing in ear [closed]

What causes very high pitched sound in one's ear?
-1
votes
0answers
23 views

what is the Ground substance of plant organs made up of? [closed]

there's this MCQ question in my course that asks about the origin of ground substance in plants it says: ground substance of plant organs is made up of a) Sclerenchyma b) Collenchyma c) paranchyma ...
1
vote
1answer
19 views

What would be “Sternum-Intermediate” distance?

I've asked this question on the English Language & Usage board, not being entirely sure whether this question is strictly medical, or just English knowledge suffices to answer. Do note I am no ...
0
votes
0answers
16 views

All about Sansevieria [closed]

1.Does Sansevieria plant gives out O2 at both day and night ? 2.Is it possible to grow Sansevieria plant with out sunlight ? (If not) 3.How many hours of sunlight is needed per day and what is the ...
0
votes
1answer
34 views

Can heritability be deduced from a correlation coefficient?

I am trying to understand the concept of heritability and from what I can gather, the heritability of a factor (say birth weight) must be closely related to the correlation coefficient of that factor ...
0
votes
0answers
25 views

Connecting nanotubes to wires! [closed]

So these nanotubes have a great deal of conductance, so can a assay of nanotubes be connected to a normal jumper wire (I conducted an experiment and it proved to be somewhat successful). Can a bunch ...
0
votes
0answers
23 views

Does human body have a centre of mass? [migrated]

According to this site, The center of mass of the human body depends on the gender and the position of the limbs. In a standing posture, it is typically about 10 cm lower than the navel, near the ...
0
votes
0answers
22 views

Quantum Brain Dynamics [closed]

To begin with am totally new to biology. I have no basic knowledge also But I have been studying about neurons recently and this thought struck me suddenly. I saw that neuron works based on electro ...
1
vote
2answers
29 views

Growth factors vs. mitogens

According to Campbell Biology, A growth factor is a protein released by certain cells that stimulates other cells to divide. and according to Wikipedia, A mitogen is a chemical substance ...
1
vote
1answer
19 views

Advantage of GCPRs over RTKs or other receptor protein kinases

My book lists two important differences between GCPRs and receptor protein kinases: GCPRs do not directly activate a signal transduction pathway. It only does so indirectly, via a G protein. On the ...
4
votes
1answer
31 views

What does “~mitochondrial DNA ~bp linear DNA” means?

I'm surfing NCBI website -Nucleotide- to find some examples of real DNA sequences to use in my small homework project. My question is related to the title of a DNA sequence below: Sus scrofa ...
-1
votes
0answers
90 views

Can you get pregnant from having sex in a hot tub after sitting in it for a while? [closed]

I'd call the question "How does staying in hot water affect men's chances to impregnate a woman" but you get the idea already. At school we are taught that sperm die at 92 °F (~33.3333 °C) and below ...
3
votes
1answer
17 views

Do fish increase or decrease pH of aquarium water?

If I understand it correctly, aquarium fish produce NH3 as their waste product and CO2 due to respiration. Producing NH3 increases water pH due to its equilibrium with NH4+. Producing CO2 decreases pH ...
1
vote
2answers
21 views

How is e-value calculated in BLAST 2 sequences (BLAST+)?

In the BLAST+ packages, you can align two sequences instead of searching a database: tblastn -query seq1.fa -subject seq1.fa The web BLAST documentation states ...
1
vote
0answers
15 views

Can one eye affect the other eye's low-light adaption?

This previous question addresses how long eyes need to adapt to darkness and reach full contrast. My question is how does one eye affect the "transition" and/or efficacy of this "night vision" of the ...
1
vote
0answers
34 views

Incomplete dominance with gain-of-function allele

Can somebody site an example of incomplete dominance with gain-of-function mutation?
0
votes
0answers
12 views

Hematopoietic System Kinetics [closed]

I am looking for some help finding reference(s) showing cell turnover rates in the hematopoietic system. Including how long a given cell type like granulocytes would be expected to exist in peripheral ...
0
votes
0answers
16 views

NMDS analysis - weird plots

I ran a NMDS analysis on 16S tag sequencing data on three different 16S regions, and would like to establish the regression coefficients (R, p) from this. All the data is stored within a combination ...
1
vote
1answer
28 views

How are vaccines and inoculations different? [closed]

If so are vaccinations more safe? If so how? And how is the vaccine a magical invention?
2
votes
1answer
68 views

Synaptic pruning and selective elimination during adolescence

How does Synaptic pruning occur during pre-adolescence, adolescence and post-adolescence, after there is blooming overproduction of synaptic connections until the years of late childhood, and how does ...
1
vote
0answers
11 views

Can we take advantage of nanopore sequencing systematic errors to predict secondary structure motifs?

One of the methods of single-molecule sequencing, Nanopore sequencing, is based on traversal of DNA strand through a nanopore. Nucleotide is determined by measurement of ion current (when nucleotide ...
0
votes
0answers
6 views

using bioreactors for bacteria and yeasts

I have some questions about the OD to inoculate in a bioreactor and the OD for the induction using bacteria and yeasts (Pichia pastoris) to produce recombinant proteins. Which is the OD for the ...
4
votes
3answers
78 views

Why do bacteria die in a high sugar content environment?

I was reading some questions in the test bank. Then in Chapter 27, I wonder why the answer is A. (undergo death by plasmolysis). Is the high concentration of sugar that kills them or the effects of ...
3
votes
1answer
28 views

Is there any websites that provide the DNA sequences of food samples?

We can get many DNA sequences at NCBI websites for free. Is there any websites that provide the DNA sequences of food especially meat, for free? When I read papers regarding food authentication, ...
1
vote
1answer
39 views

Whales and cancer [duplicate]

Do whales get less cancer than they should considering they have a lot more cells and tissue? If a lot of cancer formation is random because of mutations then shouldn't whales receive a lot of ...
2
votes
0answers
25 views

The evolution of sleep [duplicate]

Are there evolutionary theories as to why we (and most animals) sleep? Some claimed functions of sleep include: restoration, waste clearance, memory processing, etc. But unless we understand why ...
4
votes
1answer
44 views

Question about SAM CIGAR string

My question is about the CIGAR specification. The documentation states: M 0 alignment match (can be a sequence match or mismatch) ...
1
vote
0answers
15 views

Convert flux value in nmol/min/mg protein to nmol/min/cell?

This is a question about unit conversion. I found an experimental measurement of the saturation uptake of glucose in yeast: $$V_\textrm{max} \approx 650 \textrm{nmol}/\textrm{min}/\textrm{mg ...
1
vote
0answers
19 views

What does glucose change into? [closed]

What are the names of the substances that glucose can be changed into that a plant needs for different functions or structures?
0
votes
1answer
21 views

Genetic coding question, amino acid to base relationship

I'm studying for a test and I am confused by these problems/statements. How many amino acids will 18 bases code for? Answer: 6. I got this right. If a certain complete protein has 33 amino acids ...
0
votes
0answers
19 views

Readers in biological nomenclature

I know that a binomial name may be followed by the name of the reader who has been the first to identify the species and to give it that binomial name. It is not completely clear to me what the same ...
1
vote
1answer
22 views

Does vitamin C decrease after reacting with oxygen free radicals?

From the research that I have done, I know that antioxidants such as vitamin c donate electrons to oxygen free radicals and effectively neutralize them. They themselves do not become free radicals as ...
5
votes
1answer
24 views

Why does influenza sometimes cause GI symptoms?

I'm speaking strictly of influenza, not gastroenteritis which is sometimes mistakenly called "stomach flu." I just read this article on the mechanism through which rotavirus causes diarrhea and ...
4
votes
0answers
32 views

How do disulphide bonds in hair cause curling?

I understand that the asymmetrical distribution of disulphide bonds in hair cause curling, but do not completely understand why this causes an inherent curl on the macroscopic level, for several ...
4
votes
1answer
70 views

All-or-nothing-law: law or general principle?

The all-or-nothing principle indicates that a nerve cell fires at maximum potential or not at all, based on a threshold on the stimulus. Is this a statement which is always true, or only ...
0
votes
0answers
26 views

How are instincts inherited and decoded? [closed]

I've studied that instincts are specific behavior ( migration of salmon) , which are inherited from parents to offspring. Since, our genome is passed only to our offsprings. Where are these instincts ...
0
votes
1answer
34 views

What is the best way to block cigarette smoke from the body? [closed]

Would it be better to hold your breath after smelling the presence of it or quickly inhale and exhale to get rid of it in your system(body)? EDIT: Changed from carbon monoxide to cigarette smoke.
14
votes
3answers
7k views

Can the dead be brought back to life by viruses?

Zombies have been a part of popular culture for decades. The living dead rising up to take over the world is a terrifying concept, worthy of Hollywood blockbusters and television hits. Some of those ...
3
votes
0answers
38 views

Why doesn't lard taste good? [closed]

I mean looking from evolutionary perspective sugar tastes sweet and individuals that had this perception ate more sugar and survived and those that didn't perceive sugar as sweet didn't eat it and ...
1
vote
1answer
19 views

How does Organ Transplant work well despite having Foreign DNA

My question is little bit related to this one Why does organ transplant work although it seems organ's motor neuron isn't connected to recipient's CNS but only little bit. Problem ...
0
votes
2answers
34 views

Difference between DNA and Genome

Can we safely use the terms DNA and Genome interchangeably or is there any (even slight) difference between the two?
-1
votes
0answers
22 views

Is ginger a vegetable?

Not sure if I should ask this here or Cooking. Is ginger a vegetable? I realise that it is a root and considered a spice. But what makes it different from other root vegetables, for example carrots?
1
vote
1answer
10 views

Difference between LH and ICSH

Are Luteinizing hormone and Interstitial Cell Stimulating Hormone(ICSH) the same?
3
votes
0answers
38 views

How hard would it be to synthesize a virus in 1960? [closed]

Assuming 1960 technology, how hard would it be to synthesize a virus? Im curious as to how developed technology was back then and the amount of cost and effort it would take given the fairly basic ...
1
vote
0answers
26 views

Is urine sterile? A reference request for evidence supporting sterility

There is a seemingly unfounded mantra that a person's urine is sterile who is not suffering from a UTI. So far I have found convincing evidence to the contrary; urine is not sterile. This poster ...
4
votes
0answers
39 views

Aquarium snail identification

Many of these little snails suddenly appeared in our aquarium from nowhere. I suspect that some snail eggs hitched a ride with some recently purchased plants. Can anyone identify the species? I am ...
0
votes
0answers
15 views

Why does human waste still contain nutrients for plants?

The question is motivated by the Martian movie, in which the main character (Mark Watney) uses human waste to fertilize Martian soil and grow potatoes. Following the idea that energy can only ...
1
vote
0answers
20 views

Vitamin E Production and Sun Light [closed]

Do animals with fur need sunlight to produce vitamin E? It it necessary to have sunlight in humans to make it?
1
vote
1answer
21 views

Difference between negative allosteric regulation and non-competitive inhibition

Both connect to some site other than the active site which controls the shape of the active site and causes the enzyme to be less active. So what is the difference?

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