Search found 61 matches

by cool A-level student
Tue Dec 06, 2005 12:39 pm
Forum: Cell Biology
Topic: How many chromosome in a cell?
Replies: 4
Views: 2839

human cells have 23 pairs of chromosones and so 46 in total
by cool A-level student
Tue Dec 06, 2005 12:37 pm
Forum: General Discussion
Topic: understanding saturated lipids and unsaturated lipids
Replies: 1
Views: 2888

also the fatty acids on lipids can be either bent or straight, the straight ones are saturated and the bent or curved ones are unsaturated.
this is due to a different place of the hydrogen bon, rather than a 1,4 bond its a 1,6 bond which causes it to curve.
by cool A-level student
Mon Dec 05, 2005 10:53 am
Forum: Cell Biology
Topic: Cell membrane and cell wall
Replies: 10
Views: 6855

the cell wall has pores and is generally more permeable as u guys have said
in teh membrane you get different kinds of proteins like carrier proteins or channel proteins ect...
it all adds up to be more permeable
by cool A-level student
Fri Dec 02, 2005 2:07 pm
Forum: Cell Biology
Topic: PLANT AND ANIMAL CELLS
Replies: 19
Views: 19663

animal cells can have vacuoles for storage but generally not and the 1's that do are small
by cool A-level student
Fri Dec 02, 2005 2:04 pm
Forum: Molecular Biology
Topic: Which came first the DNA, RNA or protein
Replies: 64
Views: 74593

well 1st off the molecules and elements which make it up would build up i guess. and then form molecules, the smaller stuff at first like amino acids and RNA ect... and would later develop into more complex molecules like DNA and proteins, i would GUESS that DNA came 1st as its the instructions to b...
by cool A-level student
Thu Dec 01, 2005 1:49 pm
Forum: Cell Biology
Topic: need info on pus cells-fredrick chamberlain
Replies: 2
Views: 2608

id help but ive only heard of the guy, i know nothing about him
by cool A-level student
Thu Dec 01, 2005 1:49 pm
Forum: Cell Biology
Topic: PLANT AND ANIMAL CELLS
Replies: 19
Views: 19663

plant cells are also more structured than animal cells, they form a certain hard shape (which holds the plant up i guess) whilst animal cells sort of form a blob, something to do with the cell wall as that increases the outermost structure of the cell. there are added organnelles like the vauole (st...
by cool A-level student
Thu Dec 01, 2005 1:45 pm
Forum: Cell Biology
Topic: mucor on bread???
Replies: 1
Views: 2017

yeast is a life form that feeds on things like sugar and respires and so produces the gas carbondioxide which makes bread and cakes ect... rise
which is also why you don't have to worry about eating the yeast as when it gets too hot they die.
by cool A-level student
Thu Dec 01, 2005 1:42 pm
Forum: Cell Biology
Topic: help me-some descriptions
Replies: 4
Views: 2782

simple google searches or browsin on ere shud give u all da answer u need
by cool A-level student
Wed Nov 30, 2005 2:15 pm
Forum: Molecular Biology
Topic: mRNA
Replies: 6
Views: 3898

mRNA or messenger RNA is a single strand of copied DNA which ends up at the ribosomes where it is changed into amino acids and thus proteins using the instructions from the mRNA. mRNA is made so that its not all "messy" in the cell with all the DNA going everywhere, so mRNA is copied to give a small...
by cool A-level student
Wed Nov 30, 2005 2:09 pm
Forum: General Discussion
Topic: Definition of life in general biology books
Replies: 6
Views: 3855

the meaning of life is to live. or as my bio teacher said to reproduce and continue to pass on our genetic code to the next generation. the meaning of life is more or less an opinion, none of us will know until "god" if there is such a thing tells us, until then our opinions guide us in the meaning ...
by cool A-level student
Tue Nov 29, 2005 2:01 pm
Forum: Cell Biology
Topic: plasma membrane function
Replies: 6
Views: 8250

<slaps head>
stupid me, ur right