0
votes
0answers
4 views

Basic Gene/Chromosome/Genome/Protein question.. which comes first?

How are they ordered? Genes make up Chromosome, and Chromosomes make up a Genome... So, where does Protein come into play? What do you call Genes that are spliced together to form something new? ...
0
votes
0answers
4 views

What is the field of view for the human eyes?

I'd like to know how much a person can see regarding the angles. If it is a rectangle, I'd like to know it's height and width. But if is another shape, I'd like to know which kind of shape and the ...
3
votes
1answer
8 views

What Websites Have Image Libraries for Bacteria and other Microorganisms

What Websites Have Image Libraries for Bacteria and other Microorganisms? With age of cell phone microscopes and hand held spectrometers it would be interesting and valuable to be able to compare ...
0
votes
0answers
4 views

Is recombination suppressed in the males of all Drosophila species? Any other species?

Following up from this question, I am wondering if the phenomenon of genome-wide suppressed male recombination is limited to Drosophila melanogaster or is common to all Drosophila? The answer to the ...
3
votes
1answer
9 views

positive epitope fragment

What is a positive epitope fragment? I found this term in this paper: COBEpro: a novel system for predicting continuous B-cell epitopes by Michael J. Sweredoski and Pierre Baldi
1
vote
1answer
24 views

why male penis not considered as cartilage? [on hold]

Penis don't have bone like ears & nose, then why why male penis not considered as cartilage? en.wikipedia.org/wiki/Cartilage
0
votes
0answers
7 views

Is it correct to compute pairwise and multivariate correlations between gene expression values on log2 and heavily normalized data? [on hold]

Is it correct to compute pairwise correlations between microarray expression values on log2 and heavily normalized data? In other words: should I normalize and standardize microarray data for ...
2
votes
0answers
39 views

How is atrial muscle stimulated, when the Atrioventricular (AV) Node is heart main pacemaker? [closed]

When the sinoatrial (SA) node is blocked, the atrioventricular (AV) node is heart pacemaker and controls ventricular contraction. The heart then beats 40-60 times per minute. What happens to atrial ...
-1
votes
0answers
7 views

What software/approach to use to build a graph based on microarray gene expression correlation?

What software to use to build a graph based on microarray gene expression mutual correlation? I have tried Cytoscape`s Reactome FI and a recipe from R bioinformatics cookbook, however, need a more ...
3
votes
1answer
38 views

How does menstruation proceed during one period?

I'm simplifying things here: A. Does a woman bleed constantly, like a drop every 10 minutes? Two hours without pad or tampon and your underwear is dirty? or B. Does a woman bleed suddenly a ...
2
votes
0answers
11 views

Controlling reflexes

If the reflex arc carries signals from receptor neurons in my fingertips and relays that information to an effector, how can this be overridden when picking up hot things like food which would ...
2
votes
1answer
40 views

Are boat-tailed grackles efficient flyers?

The boat-tailed grackle's deep-V tail would seem to cause a great deal of drag or even downward deflection (like an airplane's elevators). How much does this actually affect the bird's flight?
1
vote
1answer
31 views

How was the origin of CTVT parasitic cancer determined?

The wikipedia article on CTVT says that the tumor cell has 57-64 chromosome while a normal dog has 78 chromosomes. Similarly while all chromosomes in dogs except the X and Y chromosomes are ...
1
vote
0answers
24 views

Length of sleep time

Why do we wake up after 6-8 hours of sleep ? Why don't we sleep for lets say 20-30 hours ? What mechanism is it that controls when to wake us up and how does it determine the moment that we should ...
1
vote
1answer
18 views

Crossing white eyed Drosophila with sepia eye

So, I'm doing some drosophila experiments with my high schoolers and I had really poor production of wild type individuals for doing the experiment resulting in not enough to cross with everyone... I ...
4
votes
2answers
52 views

What does units/mg mean for Streptavidin

I got streptavidin for surface reaction. The label says "biotin binding: 16 units/mg". What does units/mg mean? Does it mean "1 mg biotin can bind to 16 units ...
4
votes
1answer
47 views

What kinds of cells does human saliva contain?

I have heard that our saliva contains cells. What cell types can be found in human saliva?
5
votes
0answers
27 views

How much total RNA can be extracted from Drosophila brain

I am wondering how much total RNA could be extracted from a single D. melanogaster brain. I could not find this information from the literature. The closest hit was this paper: ...
2
votes
1answer
23 views

How to retrieve full gene names list and Entrez gene IDs and other annotation information from HUGO gene name list (in R or any)?

How to retrieve full gene names and Entrez gene IDs and other annotation information from HUGO gene name list (in R or any other software or language)? Is it possible ice versa: having full gene ...
1
vote
0answers
6 views

Gene expression for mouse feeder cells (inactivated MEFs)

I'm looking for a paper with gene expression data for mouse feeder cells, inactivated by gamma radiation or mitomycin C. Ideally I'd like RNA-seq data but I'll use microarray data if that's all there ...
2
votes
0answers
26 views

Is there tea allergy? [on hold]

In every day when I drink more tea than other drink I have to go to water closet more often than other days. Does it cause any allergy or any other reason behind it?
0
votes
0answers
21 views

Are there any conventional standarts to microarray experiments data representation to biomedical journals? [on hold]

Are there any conventional standards to microarray experiments data representation to biomedical journals and thesis committee? Should I save raw data or send them log and prenormalized data sets? Is ...
0
votes
0answers
12 views

What is the adequate rational approach and software to visualizing VCF genome comparison files? [on hold]

What is the adequate rational approach and software to visualizing VCF genome comparison files? Have >100 VCFs with errors from tuberculosis whole genome comparative research, need to filter files and ...
9
votes
2answers
8k views

Blood Pressure: Significance of difference between systolic and diastolic

I wanted to understand what is the difference between systolic and diastolic readings of blood pressure. I understand 120-80 to about 100-60 is considered normal but does the difference in the two ...
1
vote
1answer
36 views

How does Haloxyfop control young grassy weeds in fields of broadleaved crops?

Haloxyfop (haloxyfop-P-methyl) is a selective herbicide used to control grassy weeds in young stages. The mode of action (iirc) is basically inhibition of acetyl CoA carboxylase (ACCase). Why does ...
2
votes
1answer
40 views

Speed of effective lymphatic drainage?

Lymphatic drainage occurs from many portions of the body: To venous angle: head axillary lymph nodes hands abdomen legs (I think legs' drainage goes through abdomen) The speed of the lymph ...
3
votes
1answer
28 views

Are codons that map to the same amino acids interchangeable?

(disclaimer - I'm just getting interested in genetics so sorry if this is an obvious/silly question.) I see from http://en.wikipedia.org/wiki/Genetic_code in the section on the RNA codon table a ...
0
votes
0answers
9 views

Swellings with Variegated consistency

I am interested in knowing the names of all swellings with variegated consistency. I have come across the following: Malignant swelling with partial necrosis Caseated tuberculous lymph nodes ...
6
votes
1answer
59 views

How does MSMA kill crabgrass with only minimal damage to lawn grasses?

I use MSMA (Monosodium methyl arsenate) to kill crabgrass in lawns. I am not certain of the mode of action. How does this chemical work? How does it target the annual grassy weeds, without ...
6
votes
0answers
54 views
+50

How does Halosulfuron-methyl kill nutsedge, while leaving lawn grass and most weeds undamaged?

I use Halosulfuron-methyl to control yellow and purple nutsedge in lawns. This chemical acts by interfering with the acetolactate synthase enzyme, which quickly slows cell division, and growth at all ...
4
votes
0answers
32 views
+50

Why doesn't Fenoxaprop-P-ethyl damage cool season lawns?

For controlling bermudagrass, Cynodon dactylon, a serious perennial grassy lawn weed in my area, I use the herbicide Fenoxaprop-P-ethyl. It kills the bermudagrass rather well, without damaging the ...
4
votes
1answer
53 views

How can a plant resist glyphosate (Roundup) herbicide?

In my area, the most common weeds that strongly resists (N-(phosphonomethyl)glycine) (glyphosate) are the horseweed, or mare's tail, Conyza canadensis, and Canada thistle, Cirsium arvense There are ...
1
vote
1answer
176 views

Why doesn't the herbicide 2,4-D damage lawn grass?

I sometimes use 2,4-Dichlorophenoxyacetic acid to control broadleaved weeds in lawns. It is selective, and quickly kills the dicot weeds, while other plants are unharmed. 2,4-D is a synthetic ...
0
votes
2answers
28 views

mRNA Transcription from Nuclear DNA

How does a cell "know" the coding strand vs. the non-coding strand of DNA during transcription of mRNA?
-4
votes
1answer
43 views

Can genetic engineering be performed without a laboratory setting? [on hold]

I'm becoming more interested in genetic engineering as I learn more about it, and it's becoming more and more apparent that there's very few resources on genetic engineering at home. A similar ...
1
vote
2answers
37 views

What are the differences between a benign tumor and swelling?

What are the differences between a benign tumor and an injury related swelling? And can swellings due to injury turn into a benign tumor?
2
votes
0answers
16 views

What is the most complex biological organism (or precursors) that we have been able to synthesize from raw materials?

In the Miller–Urey experiment they produced several amino acids. I'm not sure if there were other similar experiments that got further. ...
1
vote
1answer
21 views

Dehydration from caffeine, alcohol and other

Tea, Coffee, Beer, Coke etc… I wonder if the benefit from amount of fluid we get from them is bigger or smaller then the handicap of dehydration. In other words it is worth to drink them if we want ...
2
votes
1answer
36 views

Dehydration by a tea, coffee, beer etc

For the long time I am trying to find out if the following is truth: They say that some beverages dehydrates. I heard that about tea (sometimes green, sometimes black, sometimes both), coffee, beer ...
6
votes
0answers
39 views
+50

Why doesn't Clopyralid damage cool season lawn grasses?

I use Clopyralid (3,6-dichloro-2-pyridinecarboxilic acid) to kill broad leaved weeds in lawns. From my understanding, it works by mimicking an auxin which affects plant growth. Naturally this pulls ...
6
votes
5answers
447 views

Relationship Between Evolution and the Increase of Entropy of Earth

I was confronted by this question: Biological evolution of life on Earth, from simple prokaryote-like cells to large, multicellar eukaryotic organisms, A) has occurred in accordance with the laws ...
0
votes
0answers
16 views

Transfect Mammalian Cells with Single Stranded DNA?

Agrobacteria can deliver parts of their DNA to plant cells as T-DNA, transfer DNA. This DNA is delivered as a single strand and can be integrated into the plant genome or can be converted to a double ...
-1
votes
0answers
30 views

Genetic Code Question [on hold]

The following template strand contains codons encoding the beginning part of a polypeptide. Which of the following amino acids is the fourth amino acid found encoded from the beginning/start of the ...
-1
votes
0answers
16 views

A lifeform similar to known lifeforms, with one difference [on hold]

What would the feasibility be of a lifeform where sucrose serves the purpose of glucose, and what other differences might be necessary? Perhaps some way to get around spontaneous glycation issues?
4
votes
1answer
45 views

After how many generations descendant is not more related to ancestor, than to a random individual in an ancestral population?

Descendant of n generation has on average 1/2n DNA of ancestor. (For example children have 1/2 DNA of parents and 1/4 DNA of Grandparents, After 10 Generation 1/1024 DNA and after 100 Generations ...
2
votes
1answer
218 views

What are hot spots on human body?

Recently I have just discovered that a certain amount of the mobile phone frequency can be absorbed by human tissues. For example, this is the SAR info of iPhone 4s: Head: 1.180 W/kg 1 g Body: ...
3
votes
1answer
58 views

How long does it take to form a peptide bond?

What is the time taken to form a peptide bond in vivo or in vitro? It isn't mentioned in my course on protein structures. I was just curious to find out if any time scale is known? Given that ...
0
votes
0answers
30 views

Phenotype choice for one of a MZ twin pair in a genetic association study

I was having a discussion with a colleague and this question came up... It is commonplace in molecular genetics studies to only genotype one of a pair of monozygotic twins (and then implicitly impute ...
5
votes
1answer
67 views

How can we calculate the minimum sustainable number of the panda population?

I have a degree in Biology so I'm a little embarrassed that I never learned this, but... How do we know 1600 Pandas isn't enough? I know that we have historical numbers (although I couldn't find ...
2
votes
1answer
43 views

How do C. elegans manage nutrition?

If there is ample amount of food, do C. elegans worms know when to stop eating or do they store extra energy? Could they put this extra energy to use by moving faster or putting more eggs?

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