Dna Definition and 374 Threads

I was wondering how instinct or other forms of 'memory' are encoded in DNA. It seems there is a reservoir of knowledge that is stored in some way. Is this currently explained in genetics?

It seems that dna is constantly taking on damage - entropy. Why doesn't this damage accumulate over time? It appears that the amount of genetic damage that should accumulate would significantly outweigh the amount of ordering produced from the basic mechanisms of evolution. How is DNA ordering...

Before I ask my question, I would like to state that I am not a Biology student. I am actually a Chemistry student who has a small section on Biochemistry in his syllabus. Now, my problem lies with part (ii). Mechloroethamine obviously hold the DNA strands together and prevents the DNA...

Hello! If I run an agarose gel of undigested DNA of an organism with more than one chromosome, and obtain one band (slightly smeared), what does this mean? The chromosomes aren't all the same length (some might be approximately half the size of others). Is it because they all become...

I started reading 'Genome' by Matt Ridley thinking it would answer my questions of what genes, DNA, etc are, but I found myself frustrated with its approach. He only gives a short outline of where chromosomes and genes reside (in nuclei of cells) in the preface but there's no clear explanation...

If there is some identical bacteria in petri dish and you insert plasmids containing different DNA fragemnts. When bacteria that takes it up grows, do they grow in separate colonies. I mean does all bacteria that took plasmid A grow into one colony, and all bacteria that got plasmid B into one...

1. Ok in the plasmid we used the ECOR1 to create sticky ends. Now my question is when we add DNA ligase, why don't these ends stick back again. How are we able to add new DNA piece in between. Basically what I'm saying is when ECOR 1 creates sticky ends in plamids, why do they separate the...

Does mtDNA recombine? I've tried doing my own research but I'm getting very mixed responses, from the evidence being strongly against it, right up to it being a well-known phenomenon in yeast. any insight please?

Does the immune system system or do host cells have any way of sabotaging the DNA of viruses during the lytic cycle, so that even if they do replicate, they are not as effective in replicating as the initial virus? Is there any other way, if apoptosis has been inhibited, for the host cell to...

http://gizmodo.com/5704158/nasa-finds-new-life This might EASILY be the most amazing discovery in several decades, if not a century. Seriously, could anyone's theory have anticipated this discovery? EDIT: Okay it might not be independently evolved from other lifeforms (gizmodo article was too...

Hi, I'm more conversant with Physics than Biology, and I think this question may actually apply more to the computer sciences so pls bear with me - DNA is represented as a 'strand', and is analogous with a 'line' of code. Turing envisioned the computing process as two 'infinite' strings...

hi, DNA and RNA seem to be very peculiar molecular structures that are able to replicate themselves, and they are unique regarding this point, right?. But which chemical "magical" phenomena is responsible for this ability to reproduce?

i have to fill in the blanks for the following questions using the following choices (some will be used once, others more than once, and others not at all) : z-dna, cruciform structure, mirror repeat, hairpin structure, g-tetraplex, triplex dna, hoogsteen pairs, a-dna, duplex dna, inverted...

Hi, I am a student of Biomedical Engineering and am new to Biology and ofcourse, to Human Anatomy. I have been studying Human Skull for the last two weeks now and a question kept ticking me throughout. What really is the main difference between a Male Skull and a Female Skull ? ! I...

Hi, I'm trying to figure out if it is possible to induce (hydrogen) bond breakage between DNA base pairs by resonance. Does anyone know if this is possible or even aware of bond breakage in other molecules by similar methods? Thanks!

I was wondering if topology has ever been utilized on the structure of DNA and how that applies to its functions? I am assuming that it has as this is one of the most obsessed over molecules in the 21st century. I am interested in this area of topology if it exists. Also I have no previous...

Can a DNA test differentiate between a females maternal grandfather and maternal grand uncle, the grandfathers brother. And also can a DNA test differentiate between this same females paternal grandfather and paternal grand uncle. In otherwords can this females paternal and maternal...

I was wondering what are some good institutions in the USA (preferably in Connecticut) that give reliable genealogical DNA tests. I am interested in seeing what my heritage is composed of. I'd also like to see if I have Ashkenazic heritage.

Familial DNA leads to "Grim Sleeper" arrest Peace for the families of the victims; uneasiness for the ACLU. Some interesting food for thought in this article: http://www.nytimes.com/2010/07/09/us/09sleeper.html?pagewanted=1&_r=1

Homework Statement A DNA strand with the sequence 3' GTGAACTGC 5' is complementary to the sequence Choose one answer. a. 5' GTGAACTGC 3' b. 3' GACGTTACA 5' c. 3' GCAGTTCAC 5' d. 5' GCACTTCAC 3' . Homework Equations 3' GTGAACTGC 5' 5' CACTTGACG 3' The...

Homework Statement If a double-stranded segment of DNA has been found to have 23 purines and 15 thymines, how many guanines are there? Homework Equations purines are adenine and guanine...adenine and thymine should be equal amounts. So, there are 15 adenines. Out of the 23 purines...

Homework Statement A portion of DNA has the sequence 3' TTGACGC 5'. The sequence of RNA that is transcribed from this sequence is Choose one answer. a. 3' UUCAGCG 5' b. 5' AACUGCG 3' c. 5' AACTGCG 3' d. 5' GCGUCAA 3' Homework Equations 3' TTGACGC 5' 5'...

UC Berkeley students asked to submit DNA samples. Read more in the NewScientist article: http://www.newscientist.com/blogs/shortsharpscience/2010/05/berkeley-student-dna-test.html George Annas at Boston University told the Times: Isn't it a bit creepy? 21st century Big Brother?

What makes it suitable for the technology? Why don't we use eukaryotic DNA instead? Is it because of the gene for antibiotic resistance that's characteristic of most types of bacterial plasmids?

Hi I'm a little bit confused in terms of the DNA being carried by each chromosome. When the cell is described as 4n in Interphase; with 4 copies of each DNA molecule, does this mean that each chromatid has 1 molecule of DNA? Hence, allowing 2molecules of DNA per chromosome? Also can...

Homework Statement It has recently become possible to "weigh" DNA molecules by measuring the influence of their mass on a nano-oscillator. Figure shows a thin rectangular cantilever etched out of silicon (density 2300 {\rm kg/m^3}) with a small gold dot at the end. If pulled down and...

Ok this seems like a simple question but when I checked I get so confused. Please use these terms to answer my question. 1 DNA molecule- This means a double helix (2 strands) 1 DNA strand- This means when you break the double helix and one separate strand I thought one chromatid contain 1 DNA...

How do operons interfere with DNA replication, if at all? I know, for example, that repressors can stop RNA polymerase, keeping a segment from being transcribed, but it's still replicated. How is this? My guesses are: A. The enzymes involved in DNA replication can run right over them. or...

It is proven, populations evolve when they enter a different environment. When you as a half-fish half-amphibia want to explore land you need lungs not gills, your heart and your whole body must evolve to survive in the new environment, No dehydration in the water but pure dehydration in...

Is it within the realm of possibility for one organism to copy, store, and translate the genetic code of another organism thereby producing a replica or imitation of the organism the genetic code represents and if so would it also be within the realm of possibility for this same organism to...

Dear participants and visitors of a forum! Whether it is possible - to create the quantum computer on the basis of DNA?: http://www.sciencedaily.com/releases/2007/03/070321093451.htm http://divinecosmos.com/index.php?option=com_content&task=view&id=365&Itemid=70...

Hello everyone, Quick questions. What do they mean by different polarities in anti parallel DNA strands. Are they referring to some chemical polarity or simply the fact they run in opposite directions. I'm confused with DNA replication. DNA polymerase can only synthesize DNA in 5' to 3'...

I've got a bit of a painful question. I'm looking at several different articles that mention radiation damage to DNA quantitatively, but they use vastly different ways of representing this damage. So my question is, is it possible, first of all, to convert between umol/J (micromoles per...

Dear all, I'm studying DNA-Protein relationships for a computer simulation I have to make about it and I'm finding it difficult to understand how the RNA polymerase knows where to start and stop transcription on a strand of DNA. Could someone explain this for me? Let's assume that '['...

DNA getting smaller everytime it replicates?? Today in biology class, my teacher said that DNA gets smaller everytime it replicates. He also said that this is the main cause of aging (he said that the "shortening" of DNA ending up chopping off important genes later in life, which led to an...

Homework Statement Which of the following are true statements ? a) DNA is composed of a series of necleotides, each of which is made up of a phosphoric acid unit, a sugar unit and a cyclic nitrogen base. b) In DNA the base must be either alanine, threonine, glutamine, or cysteine...

1. I read that each gene has a 50% chance to be transferred to a single gamete. Does the distance between two genes on the same chromosome influence the conditional probability for the second gene to be transferred to the same gamete as the first one? 2. Can the process of reproduction...

DNA Found to Have "Impossible" Telepathic Properties... You knew I was going to say this. Anyways, very interesting, what do you make of it? Source: Dailygalaxy.com

Is there any SCIENTIFIC evidence of the effect of ultrasound on chemical repair of DNA? As in, is there peer-reviewed research in this? Thanks.

Are people more closely related to dogs or to cats? Based on behavior I would guess dogs, but what does the DNA say? What about the fossil record? Anybody know?

Guys I need major help with this assignment to be written in C code. I'm a beginner at this, so please explain what I should do in detail. Thanks! Caveat The solution to this assignment should be a C program necessarily structured as a main function. The problem Suppose a DNA strand...

This is not a theory, but would like to see if anyone has been working on a model for this kind of thing. Existing Theories on this subject. I was wondering if DNA is a normal part of the time line of matter in our universe. In other words is DNA based life a part of the life cycle of matter...

What are the ways used for proces DNA Is it a biological way or there are new ways of proces it on the [SIZE="3"]molecular level (physical and chemical) and for the manufacture or injection of DNA within the cell (without the use of viruses or any old ways) ?

Dose our DNA contain all the old information of the species that our species came from? For example, do we still contain the old DNA of the first mammals, or the reptiles that evolved into the first mammals?

A u g c g a a u g

Hello, how unique is DNA? What i mean is can there exist or ever exist two people with the same DNA? let's imagine there are "only" 100 trillion codes, after this number they will start repeating. Is this correct? Also, i was wondering if the DNA collected from a person at 5yrs and 90years of...

Homework Statement Name five similarities between DNA and Protein (college biology class) Homework Equations N/A The Attempt at a Solution I know one similarity is that both are made up of smaller molecules to form chains. (Polypetide chains are formed from amino acids linked...

I have a problem with DNA computation that is currently being researched. Currently all the research is being done because cells are so parallel but how is that even useful. I keep thinking if you have this so called cell computer calculate every possible addition problem possible for a 32 bit...

this is similar to how a computer processor can access any part of memory at any time. I was just wondering if things in cells can access any gene at any time sort of like, ok we need this protein let's jump to this gene and begin reading it off or is it all sequentially all the time.

How many total hydrogen bonds would exist between the following strands of DNA and their complementary strands? 1. GCATGC 2. TATGGC