Search found 42 matches

by mamoru
Wed Mar 17, 2010 2:46 pm
Forum: General Discussion
Topic: I want know how many Chromosome in Sphenisciformes
Replies: 3
Views: 1128

Heh. I was about to be snarky, but decided to look for myself. This information does not seem to be the easiest to come by. A few searches on Google Scholar got me this, but since I don't have institutional access, I can't read the full paper to know if it would help you, but it looks promising. If ...
by mamoru
Wed Mar 17, 2010 11:31 am
Forum: Cell Biology
Topic: protoplasm
Replies: 9
Views: 13023

Re:

But you (and your analogy) does not account for things in plasma membrane. There are plenty enzymes, it's not just a "school wall" Well, I don't know about your schools, but mine have pipes, wires, insulation, etc. within external walls, as well as external pipes and drainage gutters, ant...
by mamoru
Wed Mar 17, 2010 10:46 am
Forum: Cell Biology
Topic: protoplasm
Replies: 9
Views: 13023

Re:

OK, I don't blame you But the cell is composed of many components too, so won't we use the term cell? The nucleus is composed from many things, so will we not use the term nucleus? Well, sure. But, it seems to me, that there is no sense stripping away only the cell membrane and calling the rest &qu...
by mamoru
Wed Mar 17, 2010 8:00 am
Forum: Cell Biology
Topic: protoplasm
Replies: 9
Views: 13023

Re: Re:

It might be worth noting that "protoplasm" is an outdated term not really used in modern cell biology anymore. The reason is because it isn't actually homogenous (as first thought when first viewed under light microscopes), but full of "stuff" (organelles, endomembranes, etc .in...
by mamoru
Wed Mar 17, 2010 12:39 am
Forum: Evolution
Topic: Common Ancestry - The Selfish Gene
Replies: 4
Views: 3566

Re: Common Ancestry - The Selfish Gene

If you apply the example of calculating relatedness that he uses in the last paragraph to the uncle nephew example, then you should get 2 * (1/2)^3 = 1/4, so an uncle and a nephew have a relatedness value of 1/4. Well he says "It is usually the case that the generation distance is the same for...
by mamoru
Tue Mar 16, 2010 1:25 pm
Forum: Cell Biology
Topic: protoplasm
Replies: 9
Views: 13023

Traditionally, though, the protoplasm meant everything inside the cell membrane. The two parts were the cytoplasm and the nucleoplasm. You can probably guess what those mean. It might be worth noting that "protoplasm" is an outdated term not really used in modern cell biology anymore. The ...
by mamoru
Tue Mar 16, 2010 9:32 am
Forum: Genetics
Topic: Can someone explain this to me???
Replies: 5
Views: 23426

Re: Can someone explain this to me???

For number two. I don't get how it's 190. Should it not be 250??? How do you figure? Red and Axial are both dominant traits, and all members of the F1 generation are heterozygous. If you to a diyhybrid cross of heterozygous genotypes, you end up with a 9:3:3:1 ratio of the for possible phenotypes. ...
by mamoru
Tue Mar 16, 2010 8:18 am
Forum: Genetics
Topic: Can someone explain this to me???
Replies: 5
Views: 23426

Do you know how to do a Punnett Square to calculate the expected ratios of a genetic cross? Because, if you do that for each example, you will get your answers. Do a dihybrid cross for numbers 1 and 2. Number 3 is probably answered in your textbook under the bloodtypes example of multiple alleles. I...
by mamoru
Tue Mar 16, 2010 8:02 am
Forum: Evolution
Topic: Common Ancestry - The Selfish Gene
Replies: 4
Views: 3566

Re: Common Ancestry - The Selfish Gene

In the quote below, he says that first cousins share 2 common ancestors - a grandmother and a grandfather. Makes sense so far, but he later says that an uncle and his nephew share only 1 common ancestor - the father of the uncle (or the grandfather of the nephew). Don't they also share the mother o...
by mamoru
Mon Mar 15, 2010 12:47 pm
Forum: Molecular Biology
Topic: Electron Transport Chain
Replies: 3
Views: 7281

Could it be the net 4 H2O that are used in 2x Kreb's Cycle per glucose? Remember, for each loop of the Kreb's Cycle, [EDIT -- inserted this] you use 1 H2O (-1) to combine acetyl-CoA and Oxaloacetate to make Citrate and HSCoA. Then you produce 1 H2O (+1) going from Citrate to cis-Aconitate, and then ...
by mamoru
Thu Mar 11, 2010 4:16 pm
Forum: Genetics
Topic: DNA coding strand
Replies: 2
Views: 4908

Re: DNA coding strand

What happens? When the mutation of this gene is expressed, is causes the bearer to open his biology text book to the page with the genetic code table and do his own homework, or at least attempt to and post the results and ask specific questions about the parts he doesn't understand. It's a pretty ...
by mamoru
Thu Mar 11, 2010 4:04 pm
Forum: Molecular Biology
Topic: Can AUC be a start coden in eukaryotic cell?
Replies: 4
Views: 1753

Actually, it appears that it can, but mainly* in the mitochondria of some Eukaryotes (for example in vertebrates). Take a look through this, as it lists the standard genetic code and then many, if not all, alternative genetic codes and where they are found. Any codon with an "i" next to it...