TSR Biology Society
Biology discussion, revision, exam and homework help.
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Re: TSR Biology SocietyHi guys, I'm at uni, first year Biomed. Can someone please help me with this stuff on spores in bacteria? I'd really appreciate it.
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Re: TSR Biology SocietyPioneer plants change some of the abiotic factors, eg, how rich the soil is (nutrients)(Original post by VetWannabeee)
hi guys - doing some revision and I don't trust this website im using. Is it true that pioneer plants don't change the environment / facilitate??
And yes, they do facilitate. I wouldn't trust the website youre using if I were you. -
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Re: TSR Biology SocietyBut I don't think they change the immdediate enviroment so I mean like bushes providing habitats and food chains ect .. it changes it to start the process of succession(Original post by MyselfEtAl)
Pioneer plants change some of the abiotic factors, eg, how rich the soil is (nutrients)
And yes, they do facilitate. I wouldn't trust the website youre using if I were you. -
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Re: TSR Biology SocietyThe target tissue is the group of cells that a compound, e.g. a hormone is supposed to work at. For example, the target tissue for adrenaline is a heart tissue.(Original post by volvicstar)
could someone please define the terms for me;
target tissue
respiratory substrate
thanks
A respiratory substrate is a compound that will bind to an enzyme, in order to facilitate respiration (aerobic or anaerobic), such as glucose. -
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Re: TSR Biology Societythanks(Original post by thegodofgod)
The target tissue is the group of cells that a compound, e.g. a hormone is supposed to work at. For example, the target tissue for adrenaline is a heart tissue.
A respiratory substrate is a compound that will bind to an enzyme, in order to facilitate respiration (aerobic or anaerobic), such as glucose.
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Re: TSR Biology SocietyIs this book recommended for A Level Biology?
http://www.amazon.co.uk/gp/product/0...A3KK0S74UJZEWZ -
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Re: TSR Biology SocietyNo, it depends on the school and exam board(Original post by Id and Ego seek)
Is this book recommended for A Level Biology?
http://www.amazon.co.uk/gp/product/0...A3KK0S74UJZEWZ
a good one for OCR is OCR biology heinmann
or advanced biology micheal kent for all exam boards AS and A2 -
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Re: TSR Biology SocietyAdvanced Biology by Jones and Jones is excellent!(Original post by Id and Ego seek)
Is this book recommended for A Level Biology?
http://www.amazon.co.uk/gp/product/0...A3KK0S74UJZEWZ
Didn't realise it was that expensive though!
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Re: TSR Biology SocietyCheers mate!(Original post by thegodofgod)
Advanced Biology by Jones and Jones is excellent!
Didn't realise it was that expensive though!
Haha, the price is fine. It'll be worth it at the end
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Re: TSR Biology SocietyWhich thread?(Original post by aceySnicks_x)
can someone help me with my thread, so far i have 149 views but no reply ):
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Re: TSR Biology SocietyHello!
I would love to join our society. I'm interesting and fascinating about biology and other natural sciences! So Introduce myself!
Name: Gregorius alias Kallisto
Hobbies: reading, art, martial art, sport (mainly martial art ), natural science (physics, biology and chemistry of course)
Where you live: Anywhere in Germany
Current Studying level: Studying for my life and an A-level at the moment!
What you are studying: natural sciences (physics, biology and chemistry), languages (German, English and Latin) and social sciences (history and politic/economy) - these are my subjects.
Hero(s): Gregor Mendel is one of my hero in biology: he has discovered the mendelian inheritance which were an important step in genetics in my opinion!Last edited by Kallisto; 26-02-2012 at 16:03. -
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Re: TSR Biology SocietyI'm wonder why there is no a member who is writing in this topic. Okay, it's my turn again!
I'm reading doctrines about molecular genetics. I want to know what happen by a glycosidic bond. Why is it so important for DNA? Please answer in a short comment, if it's possible.Last edited by Kallisto; 24-03-2012 at 13:31. -
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Re: TSR Biology SocietyHi, a glycosidic bond is formed by a condensation reaction (one water molecule is lost), just like when two glucose molecules condense to form one molecule of maltose.(Original post by Kallisto)
I'm wonder why there is no a member who is writing in this topic. Okay, it's my turn again!
I'm reading doctrines about molecular genetics. I want to know what happen by a glycosidic bond. Why is it so important for DNA? Please answer in a short comment, if it's possible.
The opposite of a condensation reaction is a hydrolysis reaction, which is where one molecule of water is added to a compound, which splits it into two, e.g. maltose + water --> 2 glucose.
One nucleotide (the repeating unit of any nucleic acid, e.g. DNA, RNA) is joined up to another via a glycosidic bond. Also, each part of a nucleotide (the pentose sugar, the organic base, and the phosphate group) is linked by a glycosidic bond. -
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Re: TSR Biology SocietyHmmm... that sounds after an esterification as in a reaction between deoxyribose and phosphoric acid in this case. One water molecule is lost as well by this reacton. That's why I think a glycosic bond is also an esterification. That makes sense, because a condensation reaction IS an one. Am I right?(Original post by thegodofgod)
Hi, a glycosidic bond is formed by a condensation reaction (one water molecule is lost), just like when two glucose molecules condense to form one molecule of maltose. (...) -
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Re: TSR Biology SocietyEsterification is different as it has the following group:(Original post by Kallisto)
Hmmm... that sounds after an esterification as in a reaction between deoxyribose and phosphoric acid in this case. One water molecule is lost as well by this reacton. That's why I think a glycosic bond is also an esterification. That makes sense, because a condensation reaction IS an one. Am I right?
O
||
C-O-R
|
R
, whereas a glycosidic bond has the following group:
....R.....R
....|......|
R-C-O-C-R
....|......|
....R.....RLast edited by thegodofgod; 26-03-2012 at 19:08.
