Search found 13 matches

by sham
Tue Mar 21, 2006 12:29 am
Forum: Zoology Discussion
Topic: How to sample earthworm
Replies: 9
Views: 6614

Thanks everyone for the suggestion. Will try it out. BTW I am from Malaysia, a hot and humid country but with lots of ex-mining pools good for fishing.
Sham
by sham
Mon Mar 20, 2006 1:40 am
Forum: Cell Biology
Topic: Number of water molecules produced by cellular respiration
Replies: 9
Views: 39304

Kreb cycle uses 3 molecules of H2O for every pyruvate that enters it.
Equation : C3H4O3 + 3H2O = 3CO2 + 10 H (for ETS). Yes, 1 molecule of H2O will be releases when fumarate turn to malate. The other 2 H2O, I am not sure.
Sham
by sham
Mon Mar 20, 2006 1:20 am
Forum: Zoology Discussion
Topic: How to sample earthworm
Replies: 9
Views: 6614

Sorry, I did not make myself clear. I wanted to do research on population of earthworm in relation to soil fertility. I heard about using mustard or KMnO4 and pouring it onto the soil so that the earthworm rise to the surface and therefore easy to count. I have tried mustard but it doesnt work (mayb...
by sham
Sat Mar 18, 2006 6:19 am
Forum: Zoology Discussion
Topic: How to sample earthworm
Replies: 9
Views: 6614

How to sample earthworm

What is the best way/chemical that can be used so that earthworm can rise to the surface for easy sampling? Please help.
Sham
by sham
Thu Mar 16, 2006 2:40 am
Forum: Genetics
Topic: MOSAIC!!
Replies: 6
Views: 3283

Female has two X chromosomes. But one X chromosome was inactivated during embryonic development. Which X chromosome inactivated is random in each cell of a female. Therefore each female is a mosaic of genetically different tissue patches (depends on which X is inactivated). For example, female hater...
by sham
Wed Mar 15, 2006 4:43 am
Forum: Genetics
Topic: Problem.....Help!
Replies: 7
Views: 7393

One possible solution (since both genes are sexlinked to the X chromosome and recessive). R- dominant allele for normal vision B - dominant allel for normal hair Man (rB/Y) married woman (Rb/rB) Gametes from man (rB and Y). Gametes from woman (Rb and rB). Children genotypes will be female (Rb/rB and...
by sham
Wed Mar 15, 2006 3:24 am
Forum: Genetics
Topic: Help with a Genetics Problem
Replies: 2
Views: 2824

genetic problem

Possible scenario. Plant X (n=5) cross Plant Y (n=7). You get hybrid 2n=12 (from 5+7). This hybrid produced 2n gamete (paternal side = pollen grain) due to non-disjunction (n=12). Cross with ovules from Plant Y (n=7), and you get F1 (3n=19). To get F2 plant with 24 gametes, F1 plant must produce gam...
by sham
Mon Mar 13, 2006 2:51 am
Forum: Molecular Biology
Topic: Endergonic reaction
Replies: 3
Views: 7708

endergonic reaction

endergonic reaction is a reaction that requires energy. That energy is obtained by the hydrolysis of ATP to produce ADP + Pi with the release of about 31 KJ of energy that is needed for that endergonic reaction to occur.
by sham
Mon Mar 13, 2006 2:36 am
Forum: Human Biology
Topic: hormones in digestion
Replies: 6
Views: 5921

The presence of chyme (in acidic condition because of the presence of HCl) in the stomach stimulate the release of secretin, gastrin and cck that control digestive secretion. Liver does produce bile which is the byproduct of hemoglobin breakdown that occur in it. It also produces blood protein and l...
by sham
Mon Mar 13, 2006 2:22 am
Forum: Human Biology
Topic: Past, present and future
Replies: 9
Views: 5912

Animals can remember and learn from past experiences. 1) by habituation - remembering past experience by repeated action. 2) imprinting - remembering the first object it sees as its mother/ protector and learn from it. 3) conditioning - experiment by Russian physiologist Pavlov on a dog (refer to bo...
by sham
Mon Mar 13, 2006 2:04 am
Forum: Human Biology
Topic: HELP!!Need examples of neg & pos feedback on homeostasis
Replies: 13
Views: 39151

-ve feedback

No, they are not the same. The first statement says that -ve feedback takes place before normal condition is achieved (ie the process to achieve the normal condition) The second statement says that -ve feedback takes place after the normal condition is achieved (ie the process that maintain the cond...
by sham
Fri Mar 10, 2006 4:02 am
Forum: Molecular Biology
Topic: competitive and non-competitive inhibition of enzymes
Replies: 3
Views: 11499

competitive and non-competitive inhibitor

There are generally 2 types of inhibitors; reversible and non-reversible inhibitors. Competitive and non-conpetitve inhibitors are generally grouped under reversible inhibitors. Meaning, once the inhibitors left the enzymes, the enzymes can function again. Non-reversible inhibitors are usually heavy...