* Biology Higher level 2011 * (one thread please)

crayon1

A vector is a carrier of a virus!

For the dicot stem you could just use celery and the result is that you can see the different tissues i.e. vascular, dermal and ground!

What is an energized electron?
Ammmm is it that it has high energy? Like the ones used to convert ADP + P to ATP

NotExactly

Cydoniac wrote: »

1. Do we have to know what they are? Thought you just referred to them when talking about genetic engineering

It's a question some where anyway. The last month i've done every question possible.

Cydoniac wrote: »

6. If you use the potassium iodide method, it should go a yellow-green I think.

Can somebody confirm this? sorry.

Cydoniac wrote: »

Sorry if these aren't accurate. You've kind of scared me because I didn't really know all of these myself when I should

Thanks a million, sorry for scaring ya

brownlad

Gavarn wrote: »

So I was studying Human reproduction for tomorrow when I came across this:

"During the period of pregnancy testosterone causes the development of primary male sex characteristics. These include the development of the penis and the other male reproductive parts." - http://leavingbio.net/HUMAN%20REPRODUCTION-WEB.htm

:eek:

I'm never going to get a woman pregnant!

that does not make sense bro

xaoifsx

for the last one i have brown to yellow
in another book its red to yellow

red and brown are round about the same colour

crayon1

Test for alcohol using potassium iodide and sodium hypo-chloride goes from Brown-orange to pale yellow crystals!

Potassium dichromate + sulphuric acid goes from orange to green!

Gavarn

NotExactly wrote: »

Can somebody confirm this? sorry.

"To Test For Alcohol
-1. Filter the yeast solution from the conical flask
-2. Add 3 drops of the solution to 3 drops of potassium iodide and 3 drops of sodium hypochloride solution, warm gently (note it is brown in colour).

Result: The presence of pale yellow crystals shows that alcohol has been produced."

In my revision book.

xaoifsx

if i do not do well in this exam..i am going to cry!!

xaoifsx

i hope this comes up now because we would all know it so well

Gavarn

brownlad wrote: »

that does not make sense bro

Yeah I know it's just what they wrote on that study page.

I thought it was funny

GoldRush4821

The important thing about the potassium iodide and sodium hypoclorite is that it contains pale yellow crystals... It may go brown orange first of all but when put in a hot water bath, pale yellow crystals appear

Energised electrons are like what are found in the chlorophyll molecule when light is passed through the pigments... The light energises existing electrons and they go around 1 of 2 pathways, losing energy as they go around... They return as low energy electrons or in non cyclic they combine with NADP+ to form NADP-, then H+ combines with that to form NADPH etc...

brownlad

NotExactly wrote: »

I posted this in the Biology thread and I got no answer
But anyway.. I have a few questions

Ecology
I was missing for parts of Ecology. I studied grassland though, can somebody please give me a list of the flora and fauna and anything else on the Biology course that isn't in the book. Thanks. Oh and is it just for ecology that we study different things?

Genetic engineering
What are vectors?
the plasmid carrying the target gene

What is an anticodon?
an mrna has a codon(three bases E.G A,T,G ) trna has anticodon ( T,A,C)

What is the name of the plant(herbaceous stem) in the experiment to examine a transverse section of a dicot stem & what is the result?

What is a polar nuclei? (marking scheme says in embryo sack?)
2polar nuclei that join with male gamete to form triploid endosperm
What is an energized electron?
electron that has been given light energy
Where would you be expected to find an active site?
on an enzyme
What colour does alchohol go? Does this sound right. Adding potassium iodide and sodium hypochloride goes from pale red to pale yellow?
orange to green
EDIT: I just found a Biology to do list in my room and found more questions sorry,

What is a plant tissue? ground, vascular, dermal, meristematic
What is a triplet?three bases
It's role and an example? already given

I'm sorry if these are in the book I can't seem to find them.

:pac:

r0cks0l1dd

What do you need to know. I have an old book so it gives WAY too much information on it.

Also, I wouldn't do too much on Protein Synthesis. It came up last year so the chances are slim.

randylonghorn

Gavarn wrote: »

I'm never going to get a woman pregnant!

I assure you that you'll find it much tougher to get a man pregnant!

Gavarn

randylonghorn wrote: »

I assure you that you'll find it much tougher to get a man pregnant!

I don't plan on trying!

Platinum2010

so its actually potassium iodide , thats not a spelling mistake?

J_E

Platinum2010 wrote: »

so its actually potassium iodide , thats not a spelling mistake?

That's the one, yeah.

Platinum2010

Is everyone else ok for the long questions , cus im done for with um
may just ask for the pass paper

GregoryNimmo

I am actually to tired to study this. I know bits and bobs and have never failed a test... But seriously want to do well, but just ...too...tired and don't know whether to sleep cause you know when you wake up and all you wanna do is go back to sleep haha

J_E

Platinum2010 wrote: »

Is everyone else ok for the long questions , cus im done for with um
may just ask for the pass paper

Don't give up unless you're failing the Higher Level already.

Platinum2010

Barely Passed the pre paper ....

emma123abc

Platinum2010 wrote: »

Barely Passed the pre paper ....

There's not much difference between the honours and ordinary level paper... just a tiny bit more detail in honours and one of the experimemts isnt on the ordinary level paper...

So you're better off sticking with honours because a C3 is the same as an A in honours, but it'd be harder to get the passA than the honoursC

BrendaN_f

Platinum2010 wrote: »

Barely Passed the pre paper ....

if you really think there's a good chance you'll fail, take the ordinary

if not, go for higher brah

flyaway.

I have just decided to take the OL paper... there is a huge chance I will fail the HL paper and I'd rather just take whatever points I can get in OL than end up getting no points.

Platinum2010

BrendaN_f wrote: »

if you really think there's a good chance you'll fail, take the ordinary

if not, go for higher brah

see im not sure cos going into my pree i didnt know sweet f all experiments and basically got no points for section B

QueenOfLeon

r0cks0l1dd wrote: »

What do you need to know. I have an old book so it gives WAY too much information on it.

Also, I wouldn't do too much on Protein Synthesis. It came up last year so the chances are slim.

The dark stage is the light INdependent stage, not dependent stage. It can function with light but it is not necessary.

What you need to know is what it uses - the products of the light dependent stage, which are ATP and NADPH. ATP breaks down to ADP + P to provide the energy for the reaction, and NADPH breaks down to electrons, protons and NADP.

The electrons, protons, and CO2 (from respiration or from the atmosphere) join to form glucose. Final products of the dark stage are glucose (used in respiration) and NADP and ADP+P (both return to be used in the light stage).

galwayman17..

G.J. wrote: »

Damn, I was always taught that it was a pH of 6-7 for humans and around 8-9 for plants. Sorry about that! >.<

you are forgiven!;)

galwayman17..

xaoifsx wrote: »

if i do not do well in this exam..i am going to cry!!

if what i have studied on this course does not come up tomorrow i will too cry! :(

galwayman17..

GregoryNimmo wrote: »

I am actually to tired to study this. I know bits and bobs and have never failed a test... But seriously want to do well, but just ...too...tired and don't know whether to sleep cause you know when you wake up and all you wanna do is go back to sleep haha

2 spoons a coffee.... 1 sugar.... milk ..... buzzin! time to study!!

nanor92

I presume most people are asleep.. but does anyone have all the biology definitions typed up? want to have quick read over them before I go in tomorrow, in the hope I remember some of them.:o

QueenOfLeon

nanor92 wrote: »

I presume most people are asleep.. but does anyone have all the biology definitions typed up? want to have quick read over them before I go in tomorrow, in the hope I remember some of them.:o

Check the backs of your biology book or revision book. Theres usually a list of definitions. Good luck tomorrow!