Search found 17 matches

by canan5000
Mon Jan 05, 2009 2:42 am
Forum: General Discussion
Topic: Why the name
Replies: 1
Views: 2875

Why the name

I am curious and have done my fair share of digging but for the life of me cannot find an answer to why they call the unchecked proliferation of cells cancer. Most medical diseases are named for the discover, an acronym, or some latin derivation that gives a description of the condition. Why the nam...
by canan5000
Sat Jan 03, 2009 9:59 pm
Forum: Molecular Biology
Topic: a question
Replies: 3
Views: 2231

Re: a question

Please clarify what you mean by binding site. Guanine does have two sites that it can bind (hydrogen bonds) to cytosine with when it is in DNA. Hope this is the binding you were looking for.
by canan5000
Sat Jan 03, 2009 9:51 pm
Forum: Cell Biology
Topic: Glucose equilibrium within a cell
Replies: 4
Views: 6264

Re: Glucose equilibrium within a cell

You never want a isotonic equilibrium of glucose in the body because in all reality extracellular glucose is a poison an the quicker the body can produce insulin to stimulate GLUTs to uptake glucose the better. You say a poison, yes, the majority of bacteria do not possess the enzymes to digest g-6-...
by canan5000
Wed Sep 03, 2008 7:06 am
Forum: Microbiology
Topic: How are bacteria hypertrophic?
Replies: 1
Views: 2962

Hypertrophy usually refers to an enlargement of an organ or tissue that in non tumor related and does not consist of an increase in cell number either. So for a bacteria to become hypertrophic I can think of an a couple of scenarios 1. An increase in intercellular water concentration (hypotonic). 2....
by canan5000
Mon Feb 25, 2008 11:38 pm
Forum: Molecular Biology
Topic: DNA Mismatch repair
Replies: 1
Views: 1624

DNA Mismatch repair

During DNA mismatch repair when the exonuclease makes an insicion and begins repair on the daughter strand HOW does it know when to stop excising nucleotides after it excises the mismatch.
by canan5000
Thu Dec 13, 2007 8:22 pm
Forum: Cell Biology
Topic: No vaccine for HIV after 25 years ?
Replies: 17
Views: 11322

As was stated before its the viruses ability to quickly mutate and adapted to environmental antagonist, but its the viruses stealth that contiually evades the immune system. The viruses stealth is partially due to the carbohydrate coating that it has on its surface it fools the immune system into th...
by canan5000
Thu Dec 06, 2007 6:55 pm
Forum: General Discussion
Topic: Making a 100mM solution...
Replies: 6
Views: 21557

If you need to make a solution with the concentration of 100mM you need the molecular weight of 79g/mol of substance and dilute to a liter you need 7.9grams of substance mixed with 1L of water to make a 100mM solution or as your collegue said 4grams in a 50ml of water will work as well
by canan5000
Thu Dec 06, 2007 6:16 pm
Forum: Molecular Biology
Topic: enzymes in cold temperature
Replies: 8
Views: 42823

exactly the cold effects the reaction rate by slowing down diffusion of substrate. the question was "why don't enzymes work properly in cold??" This is why enzymatic activity is decreased which is analogous to enzymes not working properly in cold. Its not that they don't work properly but ...
by canan5000
Thu Dec 06, 2007 5:13 pm
Forum: Molecular Biology
Topic: enzymes in cold temperature
Replies: 8
Views: 42823

it plays a major for example the perfect enzyme carbonic anhydrase (converts water and carbon dioxide to carbonic acid) the only thing that slows this enzyme down is the rate of diffusion, its turnover number (Kcat) is about 600,000 molecules of product per second. The other perfect enzyme Triose Ph...
by canan5000
Thu Dec 06, 2007 12:54 am
Forum: Physiology
Topic: HELP wtih ATP!!!!
Replies: 3
Views: 5136

The diffusion of small molecules across phospholipid bilayers is possible because CO2 is a small non-polar molecule, and does not need to coupled with any kind of transport protein to leave the cell it can do it on its own accord. This is the mechanism that is used by respiring tissues such as contr...
by canan5000
Thu Dec 06, 2007 12:21 am
Forum: General Discussion
Topic: Can any of you tell me what this person is saying?
Replies: 9
Views: 5408

the only part of the argument that discredits this feeble attempt is when the statement of: Certain proteins help code for mRNA which in turn codes for DNA thru tRNA. As was said in a previous statement anyone with a little education can wade through this. One proteins don't code for mRNA its the ot...
by canan5000
Wed Dec 05, 2007 7:39 pm
Forum: Molecular Biology
Topic: enzymes in cold temperature
Replies: 8
Views: 42823

the cold is not as intuitive as heat. Heat is the abundance in a system and cold is the absence of energy in a system. Hence a thermometer is the an instrument that measures the average kinetic energy of its surroundings. Why do enzymes not work as well in the cold it is because the energy of the sy...