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Author Topic: BIOLOGY AS LEVEL---doubts  (Read 2443 times)

Offline 247sports

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BIOLOGY AS LEVEL---doubts
« on: May 22, 2010, 10:44:03 am »
wt the organells which we can view from an electron microscope n the organells that we cant ???

this is imp thnk you to any one who replies n answers my question
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Offline [Spy]

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Re: BIOLOGY AS LEVEL---doubts
« Reply #1 on: May 22, 2010, 10:53:29 am »
You Can View Anything With An Electron Microscope. You Mean What Can't Be Viewed Except With An Electron Microscope Right?
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Offline abuyusef

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Re: BIOLOGY AS LEVEL---doubts
« Reply #2 on: May 22, 2010, 11:30:49 am »
everything can be seen using an electron microscope ... while light microscope can view nucleus +cytoplasm +cell wall+cell membrane+chloroplast +starch
Plant cell under light microscope  
Animal cell
while under electron microscope
Animal cell
Plant cell

Remember my friend .... Google is your friend!
« Last Edit: May 22, 2010, 11:36:04 am by abuyusef »
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Re: BIOLOGY AS LEVEL---doubts
« Reply #3 on: May 22, 2010, 11:35:56 am »
im sorry but this is wrong, You cant view a cell membrane by electron microscope
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Offline abuyusef

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Re: BIOLOGY AS LEVEL---doubts
« Reply #4 on: May 22, 2010, 11:38:22 am »
IT can't be seen it's electron microscope!!!!!!!!  ??? ... it's plasma membrane right
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Offline abuyusef

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Re: BIOLOGY AS LEVEL---doubts
« Reply #5 on: May 22, 2010, 11:39:32 am »
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Offline AS-Girl

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Re: BIOLOGY AS LEVEL---doubts
« Reply #6 on: May 22, 2010, 12:05:07 pm »
Quote from: Spy on May 22, 2010, 11:35:56 am
im sorry but this is wrong, You cant view a cell membrane by electron microscope

yes u can!! cell membrane is 7nm and the electron microscope can view anything which is 0.5nm and above!!
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Re: BIOLOGY AS LEVEL---doubts
« Reply #7 on: May 22, 2010, 12:42:54 pm »
im sorry i meant you cant see it with a light microscope because he said you can view cell membranes with light microscope, false:)
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Offline unknown 101

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Re: BIOLOGY AS LEVEL---doubts
« Reply #8 on: May 22, 2010, 01:01:21 pm »
Quote from: Spy on May 22, 2010, 12:42:54 pm
im sorry i meant you cant see it with a light microscope because he said you can view cell membranes with light microscope, false:)

you can, but only the outlines, but u cant see what its made off with a light microscope!
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Re: BIOLOGY AS LEVEL---doubts
« Reply #9 on: May 22, 2010, 01:06:03 pm »
exactly, alah 3alek ya nash ;)
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Offline unknown 101

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Re: BIOLOGY AS LEVEL---doubts
« Reply #10 on: May 22, 2010, 01:08:55 pm »
Quote from: Spy on May 22, 2010, 01:06:03 pm
exactly, alah 3alek ya nash ;)

hahaha ;)
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Offline abuyusef

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Re: BIOLOGY AS LEVEL---doubts
« Reply #11 on: May 22, 2010, 01:41:38 pm »
wein wallah spy! .... keef 7alak ... hada inta 3arbi!
 
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Re: BIOLOGY AS LEVEL---doubts
« Reply #12 on: May 22, 2010, 02:17:12 pm »
ah*
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Re: BIOLOGY AS LEVEL---doubts
« Reply #13 on: May 22, 2010, 03:03:53 pm »
since nobody is answering it on student doubts::

Q 21, jun 07

why is it 20 ??? ??? ???   
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Re: BIOLOGY AS LEVEL---doubts
« Reply #14 on: May 22, 2010, 04:44:03 pm »
Nashhhh
it told you its double strand with 120 nucleotides ya3ni 60 in each. and mRNA is copied of one only. which means itself kaman its 60.

and when tRNA comes, its uses each three for one amino acid ya3ni total 60/3=20 amino acids in one polypeptide

;)
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