0
votes
1answer
122 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 ...
0
votes
1answer
61 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 ...
3
votes
0answers
35 views

What happens to the brain during sleep versus unconsciousness?

How does being unconsciousness differ from being asleep and whether it causes breaks in consciousness?
2
votes
1answer
45 views

What is it that specifically kills ALS patients?

ALS is a fatal motor neuron disease, and even though there are many different articles out there on the topic "How does ALS actually kill you?", none of them really delve deep enough into biology to ...
1
vote
0answers
34 views

What is the most stable globular protein?

What is the most thermodynamically stable globular protein? I am looking for a small (ideally less than 50kDa) soluble globular protein motif which folds easily/reliably and is known to be extremely ...
1
vote
1answer
1k views

Does mitosis include cytokinesis?

I found that some books include cytokinesis within mitosis, but some other books I have referred to include only the dividing of the nucleus as mitosis and do not include cytokinesis. Can anyone help ...
0
votes
0answers
15 views

What information do bipolar cells encode?

Short version: I don't see what information on-centre bipolar cells are actually capturing. Longer: Actually, the question could be extended to on-centre retinal cells as well, but I'll focus on ...
-1
votes
0answers
11 views

Alkali Biuret Test [closed]

In a Biuret test, the reagent is Copper (II) Sulfate in Sodium Hydroxide Solution as the Alkali. What is the purpose of the Alkali?
3
votes
1answer
90 views

How two genomes adopt when cell goes to recipient's body from donor's body?

We often give blood to another following the blood giving compatibility chart. Heart transplant and similar transplants also brings one's cell to another's body. My curiosity is, when a cell goes to ...
-2
votes
0answers
15 views

Why do calluses appear most frequent on ring finger? [closed]

I'd like to make the question a little more specific and ask why do calluses appear largest/most frequently on the ring finger, or rather the palm where the ring finger is. I regularly go to the gym ...
4
votes
2answers
79 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 ...
1
vote
1answer
16 views

Voltage sensitive dyes technique: What is the underlying measure?

I just discovered voltage sensitive dyes technique: first of all what imaging techniques do we use? And I have seen that figures are labeled with ΔF/F0, what does it stands for?
8
votes
1answer
593 views

How does the brain avoid feedback loops?

The article Ants Swarm Like Brains Think really helped me to understand the way that neurons which are pretty dumb on their own (like ants) can work together to create a pretty genius system (a brain ...
0
votes
1answer
21 views

Link between NaCl and sulfide reducing bacteria

Could there be any link between the consumption of NaCl and sulfide-reducing bacteria? In my study on mice, I can see, by adding more NaCl to mice diet, less (or to be more accurate, zero) ...
1
vote
1answer
29 views

Deducing amino acid sequence from a DNA sequence

The suggested answer to the question is the following: "M L S C D K S D Stop". I do not understand how they get that result. The question is as follows: An RNA polymerase transcribes the following ...
0
votes
1answer
22 views

Why have multiple alleles for beta chains evolved in certain parts of the world? [closed]

I believe that this could be because individuals may have had interactions with a parasite, for example Malaria, that caused changes resulting in different beta chains. Can anyone explain this more ...
-1
votes
0answers
10 views

How to increase the shelf life of yogurt..?

I wonder though bacteria is still present in it and continue to convert lactose into lactic acid then why does not packed yogurt becomes sour? How these companies increase the shelf life of yogurt..?
-1
votes
1answer
37 views

Which of these versions of allopatric speciation is correct? [closed]

I'm confused with the illustrations of allopatric speciation. Here are two diagrams- Which one of them is correct and why? According to wikipedia the second figure is correct but I'd like to know ...
-1
votes
1answer
14 views

Cellulose Branching [closed]

I understand that humans cannot digest cellulose because there are no branches to break down the polysaccharide chain. But why can cellulose not form branches?
0
votes
0answers
13 views

How is the mitotic rate controlled? [closed]

I think by regulating the temperature and pH but im not sure exactly therefore please can anyone give me a detailed structured answer.
3
votes
0answers
2k views

Experiment to show that carbon dioxide is needed for photosynthesis

In my school test, the question is as follows: Will the experiment work satisfactorily? What alterations can you make to obtain expected result? What I wrote: Yes, it will work satisfactorily. ...
-1
votes
0answers
13 views

Peak flow meters record peak expiratory flow rate (PEFR), [closed]

Peak flow meters record peak expiratory flow rate (PEFR), the fastest rate at which air can move through the airways during a forced expiration starting with fully inflated lungs. What Factors ...
3
votes
1answer
131 views

What is A in IgA? [duplicate]

What is the significance of letter A in immunoglobulinA? What are the significance of other letters D, M , G, E in diffeternt types of antibodies?
-1
votes
0answers
14 views

Has S.aureus ever been used against cancer?

Treating inoperable tumors with bacteria appears to be very effective, albeit being toxic to the patient as well. Has (live attenuated) Staphylococcus aureus ever been used against cancer? If the ...
0
votes
0answers
18 views

Synthetic biology: examples of cell orientation driven by genes or genetic modification

First of all, forgive for the naive question. I know that genes can drive the shape of cells, as the sickle-shaped red blood cells. On the spirit of synthetic biology or tissue engineering, does ...
0
votes
0answers
36 views

Is human regeneration possible? [closed]

A lizard has the ability to regenerate its tail. Is it possible by genetics to use this property on a human who is handicapped to regenerate their hand? Has this ever been tried in the past? Will the ...
14
votes
2answers
6k views

How does a plant grow before photosynthesis is possible?

During photosynthesis, a plant translates CO2, water and light into O2. I assume the carbon C is further used for the growing process. I wonder how the plant grows before the time where photosynthesis ...
8
votes
2answers
198 views

Is this a plant or a fungus?

It was soft and covered in flies. My guess is fungi. Location: South Florida.
0
votes
0answers
14 views

Is it possible and how could it possible for plant to survive in naked space

I heard that there are fungi could survive on space station in the naked space. I want to know if any plant could be able to do the same How many limitation of plant differ from fungi And could it ...
1
vote
1answer
44 views

Cell biology books

I'd like to know, what is the best list of books for non-biologist to understand, how signalling between organels is organized inside of eukaryotic cells. I really want to get how cell as separate ...
-3
votes
0answers
38 views

Is there a separation between hard- and software in the brain? [closed]

In a computer, you have (very simplified) the software, imprinted on hardware. Comparable to the cylinder in a music box that encodes the music. But when I sing a song I can´t imagine that software ...
-1
votes
0answers
12 views

What will happen if the plants starts photosynthesis at noon? [closed]

Suppose, if sunlight is only available to the trees only at noon (the hottest hours) will they be able to continue photosynthesis somehow to keep themselves alive? What kind of change they will bring ...
-1
votes
0answers
32 views

How to grow taller at 20? [closed]

I'm a 20 years old male, 5.5 Feet tall. My father is 5.6 feet tall, my mother is 5.2 feet. I'm suffering and I'm very much unsatisfied with my height. I'd give anything to accomplish my goal which ...
-2
votes
0answers
26 views

Hypothetical - living as a disembodied head [closed]

I'm writing a sci-fi story where a head and part of the neck is somehow surviving perfectly normally on its own (breathing, thinking, talking etc - that's the hypothetical part) but I want to include ...
-1
votes
0answers
12 views

Growing a carnivorous plant [closed]

My friend just got me Dionaea Muscipula today and I was wondering how big could it really grow if I feed it steroids or beef or something, would it grow big enough as to eat a small bird or a kitten? ...
0
votes
0answers
5 views

If I think of a checkerboard, is there a similar structure to see in my visual cortex? [migrated]

When I´m imagining a checkerboard in my mind, can one find, with all kinds of fancy equipment, a corresponding figure in the area of my visual cortex? For example, the neurons firing in such a way as ...
0
votes
0answers
34 views

How can I get my DNA tested without the results being kept by third-party? [migrated]

Mainly I'm interested in getting to know my ancestry, but I don't mind doing a lot of research on my own to classify it if I get raw results. The thing that I do not want is my DNA being stored ...
13
votes
0answers
223 views

What is the percentage of people living in England in 1500 AD whose lineage is still alive?

This sounds a bit random but it stems from a lecture in statistical genetics which I attended a while ago. We were shown a population lineage graph from which it was clear that most lineages go ...
6
votes
1answer
3k views

Why don't we have hair on palms?

We have hair all over the body except palms. What is the biological reason behind this? Thanks
-1
votes
0answers
24 views

cre recombinase works in two copies of a gene [closed]

Each gene has 2 copies.so when we are inserting lox p in a chromosome how it will be? how many lox p sites will be there for a specific chromosome and how to analyse the band size if it is ...
-3
votes
0answers
18 views

breeding of mice with cre/lox system [closed]

we are crossing foxp3 mutant/mutant female mice with notch1 lox/lox male mice.please tell me the possibility of getting litters when this cross has done? please specify each litter with what type it ...
0
votes
1answer
137 views

Does the use of RNA as a primer affect the accuracy of DNA replication in E.coli?

DNA polymerases have proof-reading ability, but RNA polymerase does not. Does the use of RNA as a primer affect the accuracy of DNA replication in E.coli? Explain
3
votes
1answer
50 views

Can Bacteria Repair Dephosphorylated Plasmids?

I have been trying to insert a short sequence of DNA into a plasmid. I wanted to make two different versions, with the insert at different locations. I chose HinDIII and SalI sites approximately ...
0
votes
2answers
42 views

Is there a formal definition of `nature` in Biology?

I've been discussing with a friend about Earth Day and at a certain point came out the question What do you call "nature"? He said that he considers "nature" basically all matter, including ...
1
vote
2answers
111 views

Does evolution head to some optimum? [closed]

Currently we have many species which are "good enough" for current environment, some species emerge, another die. So let's say that they could be close to some local optima. Does the evolution head to ...
4
votes
1answer
44 views

Do all prokaryotes have ATP synthases and an electron transport chain?

I was looking this up and I'm wondering if so far I'm correct about the following: For the most part eukaryotes do aerobic respiration, which involves glycolysis, the Krebs cycle and oxidative ...
0
votes
1answer
10 views

Role of Intermediate Filaments in cell - cell signalling

A passage in my textbook mentions briefly that the role of intermediate filaments in the cytoskeleton is to enable cell to cell signalling by extending between special junctions and alowing cells to ...
3
votes
0answers
22 views

Breeding Southern Right Whales Genetics

I don't know much about biology. I just like watching David Attenborough videos and this made me curious. I just watched this video about breeding Southern Right Whales, and these two quotes puzzled ...
-1
votes
0answers
94 views

Animals that live in polar environments spend much of their time with their lower limbs buried in snow. [closed]

Animals that live in polar environments spend much of their time with their lower limbs buried in snow. What differences in lipid composition might you expect to see if you compared cell membranes of ...
5
votes
1answer
105 views

How genetically similar are worker ants from the same colony?

I've been reading https://en.wikipedia.org/wiki/Ant and it says If the egg is fertilised, the progeny will be female diploid; if not, it will be male haploid. Since the males have only one set ...

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