Search found 2072 matches

by victor
Fri Jan 25, 2008 5:03 am
Forum: Molecular Biology
Topic: Y does H2O2 oxidize lipids much more strongly than proteins?
Replies: 1
Views: 2572

I think that the answers is written thare. It's all because protein has a amide group and amino acid has a carboxyl roup. Both of these groups contain carbonyl arrangements which is said to be stable to oxidation stress. Meanwhile, lipids (e.g. fatty acids) are less stable to oxidation stress becaus...
by victor
Fri Jan 25, 2008 4:47 am
Forum: Human Biology
Topic: CANCER
Replies: 4
Views: 2767

hahahaha....chicken gain :lol:
hey, by the way, talking about chicken, I think Indonesian are a really great people. Just imagine, some of the chicken butcher sells formalined chickens to be consumed and some of them do buy and eat it :lol:
by victor
Fri Jan 25, 2008 4:42 am
Forum: Human Biology
Topic: antibody
Replies: 12
Views: 8305

yup, I think that Jenniferboateng06 refers to those isotypes. Hmm....I can say yes (even though the chance is so little and won't last long), because fetus only have one type of antibody which is IgG. And as far (or near) as I know that IgG is the most 'sensitive' antibody which really plays a role ...
by victor
Fri Jan 25, 2008 4:36 am
Forum: Human Biology
Topic: Metabolization of fat
Replies: 13
Views: 10399

actually, triglycerides can be turned into glucose in human through beta-oxidation and gluconeogenesis pathway (logically). But unfortunately, degradation of fat into acetyl-CoA through beta-oxidation occurs when the level of acetyl-CoA is low, meanwhile gluconeogenesis will be turned on when the ac...
by victor
Fri Jan 25, 2008 4:18 am
Forum: Human Biology
Topic: how does food change into atp?
Replies: 9
Views: 6239

and it sure has a really long explanation to be written on the paper if it's get in into your exam :lol:
by victor
Thu Jan 24, 2008 3:33 am
Forum: Microbiology
Topic: starch positive pseudo?
Replies: 2
Views: 2287

have you get a comparison tests between P. putida and your strain? have you make sure that it's belong to Pseudomonas genus?
by victor
Thu Jan 24, 2008 3:29 am
Forum: Microbiology
Topic: Question about actinomyces
Replies: 7
Views: 6032

antibiotic produced by actinobacteria is a secondary metabolites produced in the stationery phase. In other words, when you do a batch culture on this bacteria, it would produce antibiotics when the carbon source is already limited. So, I can say yes, actinobacteria can degrade this antibiotics to o...
by victor
Thu Jan 24, 2008 3:17 am
Forum: Molecular Biology
Topic: Polar or non-polar: Conflicting answers
Replies: 7
Views: 36683

I can say that tyrosine is a polar amino acid. Even it has a phenolic side-ring, it doesn't affect the solubility of this amino acid in polar solvent (ex: water). It's all because of the strong charge of the hydroxyl group in the aromatic ring. Phenol resembles the side chain of tyrosine and thus it...
by victor
Thu Dec 27, 2007 9:56 am
Forum: Human Biology
Topic: viruses
Replies: 8
Views: 3624

Re: viruses

yup, majorly they infect CD4 T-cells which I consider as 'the root' of the immune system...
by victor
Thu Dec 27, 2007 9:51 am
Forum: Cell Biology
Topic: similarities in respiration and photosynthesis
Replies: 7
Views: 35387

Re:

MrMistery wrote:I avoid using the term reaction for metabolic processes as they sometimes confuse students, making them believe a single chemical reaction takes place. I usually use "overall reaction"


I prefer to use the term "net reaction" for that :mrgreen:
by victor
Thu Nov 22, 2007 12:18 pm
Forum: Cell Biology
Topic: Which is the correct option
Replies: 8
Views: 4823

Another example that I could think of is a PTS (phosphotransferase system) which is also utilized mainly in Gram+ bacteria. In this system, it uses phosphoenolpyruvate (PEP) instead of ATP to phosphorylate glucose and get the glucose in through the specific transmembrane gate protein. But it's known...
by victor
Thu Nov 22, 2007 10:32 am
Forum: Cell Biology
Topic: Which is the correct option
Replies: 8
Views: 4823

hmm...about the utilization of ATP to move substrates along the conc gradient, I think it's because some substrates must be activated in order to go forward the membrane gate protein. And one of the activation process is phosphorylation of the substrates/protein. I think that the example is the malt...