Year 12s: what will be the first way you research your future options? >>

Gcse aqa biology unit 2 higher

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Reply 40

FaisalNaeem03

Decent paper yaa know.

Reply 41

chocochip_

Original post by Anygy

I got so confused over the plantains questions, probably from all the math yesterday :colondollar:

Did anyone get a disadvantage for the catalase one? I wrote that the enzyme could be expensive to produce :s-smilie:

yeeeah I wrote that!!

Reply 42

username2283975

Original post by Adamtoo

For the 4 marker about how the heart rate or something like that helps the athlete during the run, I talked about how more blood is able to reach the muscles, more oxygen is able to reach along with glucose which will give energy to them. Also lactic acid being removed so the muscles can contract? Idk

yeah i also spoke about respiration

Reply 43

EmmaC_

Original post by Blahblahblah7

It said hydrogen peroxide doesn't kill every bacteria

I put enzymes can denature.. Would that be alright?

Reply 44

JoshuaE

Original post by Adamtoo

I said something along the lines of: red blood cells carry oxygen to the muscles which help it aerobically respirate... energy produced blah blah

Reply 45

Adamtoo

Original post by JoshuaE

I said something along the lines of: red blood cells carry oxygen to the muscles which help it aerobically respirate... energy produced blah blah

Ah okay, didn't mention the blood cells but looks like I didn't go off track because I thought I was just mentioning random stuff.

Reply 46

TrumpIsFancy

Original post by EmmaC_

I put enzymes can denature.. Would that be alright?

You might've needed to mention that it denatures at a high temperature. But I think you'll get the mark

Reply 47

Brewah

(5 marks) Speciation question

-Foxes are seperated and become isolated
-Mutations occur in isolated groups
-isolated groups are exposed to different conditions
-Natural selection occurs in each group
-eventually groups can not interbreed

Would i get 5 marks for mentioning all 5 of these points?

Reply 48

jackbell

Original post by Anygy

Is this the catalyst question or plantains? :s-smilie:

Sorry yes, it was the catalase one, getting a bit mixed up here. For the disadvantage i said it wasn't as fast as the large heating machine process

Reply 49

Brewah

For the advantages of the enzymes i put:

Advantage:
The enzymes work best at low tempteratures, saving money and energy.

Disadvantage:
Enzymes are expensive

What do you guys think? Full marks for that?

Reply 50

Brewah

What is an enzyme?

I put:

Enzymes are biological catalyst which attach to substrate molecules and break them down to make reactions go faster.

Reply 51

username2283975

i put
an enzyme is a biological catalyst that is made up of amino acids and proteins. it speeds up reactions

Reply 52

CopyThat

Original post by Naco88

They are talking about a different question. Where the cells were produced was the testes. How they were produced was meiosis.

http://www.thestudentroom.co.uk/showthread.php?t=4155717

It was asking how the embryo was produces from a fertilised egg cell.. This egg cell has the chromosomes from both the mother and father therefore the embryo must have 46 chromosomes therefore it's mitosis as its the production of a body cell (46)

Reply 53

username2283975

in 2014 and 2015 on foundation they gave what is a enzyme question. it was catalyst (multiple choice circle) the common answer so as long as you mentioned that you should be fine

Reply 54

Elizabesu

Original post by Anygy

Maybe I read the question wrong... if it asked how the embryo divides, it's defo mitosis. If it was meiosis, each new cell would have 23 chromosomes which would make like ..... a sperm baby... or something O.O''''''

lol same i regretted that so hard i read it wrong too

Reply 55

username2628955

Original post by jackbell

Sorry yes, it was the catalase one, getting a bit mixed up here. For the disadvantage i said it wasn't as fast as the large heating machine process

honestly, I have no clue :s-smilie:

I would've thought not, because one of the functions of the catalyst is to make the reaction faster... you might get it tho o.O

Reply 56

AK45HSR

Original post by Anygy

I was gonna write allergy one but then I thought that the catalase would've removed it anyways, so I was a bit hesitant to write it :angry:

It did say that hydrogen peroxide doesn't kill all bacterial

(edited 7 years ago)

Reply 57

CopyThat

Original post by Pro4TLZZ

i put
an enzyme is a biological catalyst that is made up of amino acids and proteins. it speeds up reactions

Oh **** **** **** ****..... I put an enzyme is a protein molecule that acts as a biological DETERGENT?!?! what the **** was i thinking :frown:

and then put that it speeds up chemical reactions.... how many ,marks would i get?

Reply 58

username2283975

Original post by CopyThat

Oh **** **** **** ****..... I put an enzyme is a protein molecule that acts as a biological DETERGENT?!?! what the **** was i thinking :frown:

and then put that it speeds up chemical reactions.... how many ,marks would i get?

i dont think any. it 2015 and 2015 foundation paper they asked what was an enzyme. they gave options and catalyst was the correct one.ill check the spec