Search found 80 matches

by claudepa
Sat Mar 31, 2018 2:35 pm
Forum: Molecular Biology
Topic: DNA code
Replies: 1
Views: 1638

Re: DNA code

For the two strands of DNA I use the designation Watson strand and Crick strand. Watson strand has the same sequence than mRNA (sense strand). Therefore mRNA is synthetized in the cell by adding bases complementary to the Crick strand (antisense strand). So the strand which is operational (I mean us...
by claudepa
Sun Mar 04, 2018 9:21 pm
Forum: Genetics
Topic: Miosis stages
Replies: 1
Views: 1503

Re: Miosis stages

It is easier for B which is a metaphase. A is more difficult. I should say may be prophase because it seems there is a begining of DNA condensation which happens at the begining of mitosis. However I have no certainty because the nucleus seems splitted in two parts.
by claudepa
Fri Mar 02, 2018 6:48 pm
Forum: Cell Biology
Topic: If there is a greater amount of activated T lymphocytes, doe
Replies: 2
Views: 2168

Re: If there is a greater amount of activated T lymphocytes, doe

I am afraid it is not so simple. In cancer immunotherapy there the good lymphocytes, cytotoxic T lymphocytes but there are also the bad ones, the regulatory T lymphocytes (TREGS) which prevent the action of T lymphocytes. So in cancer immunotherapy the therapy consists in having more cytotxic T lymp...
by claudepa
Tue Feb 13, 2018 8:09 pm
Forum: Cell Biology
Topic: when does osmosis stop
Replies: 6
Views: 2805

Re: when does osmosis stop

it seems that the Princeton file also describes equal concentrations Inside and outside
by claudepa
Mon Feb 12, 2018 9:55 am
Forum: Cell Biology
Topic: when does osmosis stop
Replies: 6
Views: 2805

Re: when does osmosis stop

Obviously you already know more on osmosis than me. In my mind osmosis stops when concentrations are similar Inside and outside the cell. If this wrong I am ready to change my view of osmosis.
by claudepa
Sat Oct 14, 2017 7:41 pm
Forum: Genetics
Topic: Dominant phenotype(Easy question but it is important for me)
Replies: 3
Views: 1899

Re: Dominant phenotype(Easy question but it is important for

There are no easy questions. I believe that there is an association between the two proteins synthetized by both alleles. In the association the dominant protein inhibits the function of the recessive protein.
by claudepa
Wed Oct 04, 2017 10:52 am
Forum: Molecular Biology
Topic: Alternative splicing
Replies: 2
Views: 2508

Re: Alternative splicing

May be I am wrong but I believed that alternative splicing is the same thing that splicing. Only in alternative splicing, splicing is different in various types of cells. So the protein corresponding to the same gene will be different in lung and liver for instance.
by claudepa
Sun Oct 01, 2017 1:58 pm
Forum: Cell Biology
Topic: Membrane Potential
Replies: 1
Views: 1855

Re: Membrane Potential

It is true that the membrane potential is between the external part of the membrane (outside the cell) and the internal part of the membrane (Inside the cell). So if both electrodes are Inside the cell there no potential. The membrane potential comes from the fact that Na+, K+, CL- concentrations ar...
by claudepa
Tue Sep 26, 2017 1:55 pm
Forum: Physiology
Topic: “Fathers” and “Sons” of theories in cell physiology
Replies: 1
Views: 1842

Re: “Fathers” and “Sons” of theories in cell physiology

I agree that many of my students had difficulties writing an article. But this was already before the SMS time. My feeling was that the best students do not go into science because it is not enough rewarding. A lot of work for low salaries. And also when you are in a non English speaking country it ...
by claudepa
Sun Sep 24, 2017 10:19 am
Forum: Physiology
Topic: “Fathers” and “Sons” of theories in cell physiology
Replies: 1
Views: 1842

Re: “Fathers” and “Sons” of theories in cell physiology

I am a retired biology researcher and I believe that the most important is in the experiment itself. Then theory is useful to interpret the results of the experiment. When I began research one of my bosses believed that the only interesting experiments were first designed in the brain of the researc...
by claudepa
Fri Sep 22, 2017 3:25 pm
Forum: Cell Biology
Topic: Mutations P53
Replies: 1
Views: 1858

Do you mean why is there a high rate of genome mutations when P53 is itself mutated ?