AQA BIOL2 Biology Unit 2 Exam - 26th May 2011

Hows everyone feeling? Whats the average mark you've had on past papers?
In a way i actually prefer unit 2 biol to unit 1.

yeah same lol

im not allowed to tell u lot wat will be in the exam today but anyways gd luck guys!

Reply 1121

Limitless

Original post by kingsmod1

yeah same lol

im not allowed to tell u lot wat will be in the exam today but anyways gd luck guys!

You haven't done the exam.

The only reason you said this is that you want people to ask you and beg you what is on it. :rolleyes:

Reply 1122

SoftMusk

10

If only my college did human bio, ugh i hate all this plant bullsht and stuff

Reply 1123

CityTrader

12

Original post by kingsmod1

yeah same lol

im not allowed to tell u lot wat will be in the exam today but anyways gd luck guys!

You know what is going to be in the exam?

Reply 1124

edrianne17

Goodluck Everyone :smile:

Reply 1125

kingsmod1

Original post by Limitless

You haven't done the exam.

The only reason you said this is that you want people to ask you and beg you what is on it. :rolleyes:

yh i havent done it, i know it

LOL JK

Reply 1126

Limitless

Original post by CityTrader

You know what is going to be in the exam?

No nobody has done the exam yet.

Reply 1127

Nuss

12

Need help with mitosis

could someone explain why the answer is BCDEA

and this question 5, i have no answers, but it makes no sense

Reply 1128

SmithytheDrummer

6

Oh god. Imagine if the six marker is to do with the plant classification bit :|

Reply 1129

heavencanwait_

Original post by SmithytheDrummer

Oh god. Imagine if the six marker is to do with the plant classification bit :|

What plant classification bit...? :s-smilie:

Reply 1130

Mina!SS

What on earth is plant classification?
What ways are used to determine evolutionary history between 2 organisms?
what are the features of cellulose, starch and glycogen? I know cellulose is made of beta-glucose, present in plant cell walls, provides turgidity and strength. But whats the role of hydrogen bonds and microfibrills?

Reply 1131

Limitless

Original post by Nuss

Need help with mitosis

could someone explain why the answer is BCDEA

and this question 5, i have no answers, but it makes no sense

In B the DNA has unravelled and replicated.
In C it has condensed to doubled armed chromosomes from 2 sister chromatids attached y the centromere.
In D the nuclear envelope has been broken down so the chromosomes are free in the cytoplasm.
In E the centromere has replicated and the spindle fibres are contracting and pulling the chromatids to opposite ends of the cell.
In A the chromatids are now called chromosomes again.

In Q5 the pictures are terrible, I can't make it out.

Reply 1132

Some random guy

13

Is crossing over a rare process? Q5c June 2010.

Reply 1133

Limitless

Original post by Mina!SS

What on earth is plant classification?
What ways are used to determine evolutionary history between 2 organisms?
what are the features of cellulose, starch and glycogen? I know cellulose is made of beta-glucose, present in plant cell walls, provides turgidity and strength. But whats the role of hydrogen bonds and microfibrills?

First one I have no idea.

Second question DNA hybridisation. Protein immunology and comparing amino acid sequences. You could also do it by looking for similar and different characterisitics but this method was used when DNA hybridisation and protein immunology was not invented.

Long straight chains with glycosidic bonds are formed between beta glucose molecules. There are rows of these long straight chains.
The long straight chains are attached by hydrogen bonds. To form microfibrils. Many hydrogen bonds give the structure strength and rigidity.

Reply 1134

Limitless

Original post by Some random guy

Is crossing over a rare process? Q5c June 2010.

Yes.

Reply 1135

Some random guy

13

Original post by Mina!SS

What on earth is plant classification?
What ways are used to determine evolutionary history between 2 organisms?
what are the features of cellulose, starch and glycogen? I know cellulose is made of beta-glucose, present in plant cell walls, provides turgidity and strength. But whats the role of hydrogen bonds and microfibrills?