Igcse edexcel 11th june 2018 biology 2b: Watch

yoongles
Badges: 12
Rep:
?
#41
Report 9 months ago
#41
(Original post by mrbubbles123)
It was runners, because thats what strawberries use for asexual reproduction. Maybe you weren't taught that

Anyone else think that the first paper was actually much harder?
i think the paper 1 was harder lol. i hope paper 2 will pull up my mark since i really want to do bio for a level. i put tubers in asexual reproduction in potatoes for that question lol
0
reply
leloswany
Badges: 12
Rep:
?
#42
Report Thread starter 9 months ago
#42
(Original post by cr_13)
Was it restriction and ligase enzymes for putting the plant pesticide in the yeast cell? And how the hell does one grow yeast cells in a fermenter (to do with spores I presume?)?
yeah the enzymes are right
Posted on the TSR App. Download from Apple or Google Play
0
reply
young_shotter
Badges: 7
Rep:
?
#43
Report 9 months ago
#43
(Original post by leloswany)
yeah the enzymes are right
would i get any marks for saying use a restriction enzyme to cut the dna and ligase to join dna together, i didnt read the question properly.
0
reply
Luka8
Badges: 1
Rep:
?
#44
Report 9 months ago
#44
Yaah 2 marks I think
0
reply
marika_mce
Badges: 7
Rep:
?
#45
Report 9 months ago
#45
In regards to the question for the importance of light in photosynthesis, i think it was possible to take it in a few ways:

I wrote the fact that you could alter the distance of the lamp, from the elodea plant, with the same light intensity; in order to see the effect on photosynthesis. The production of oxygen would decrease as the distance of the lamp from the plant decreases. (it is further away from the elodea plant which is photosynthesising underwater, hence you can see less oxygen bubbles being produced.)

Alternatively, i think you could put the plant in a dark cupboard, and take a leaf, and test it for starch using iodine solution (which would show a brown/yellow colour, as no starch is present, as it cannot photosynthesise.)
0
reply
yoongles
Badges: 12
Rep:
?
#46
Report 9 months ago
#46
(Original post by young_shotter)
would i get any marks for saying use a restriction enzyme to cut the dna and ligase to join dna together, i didnt read the question properly.
that should be 2 out of 3 marks
0
reply
young_shotter
Badges: 7
Rep:
?
#47
Report 9 months ago
#47
(Original post by yoongles)
that should be 2 out of 3 marks
thanks for letting me know!
0
reply
cr_13
Badges: 7
Rep:
?
#48
Report 9 months ago
#48
I said move the lamp at different distances to the plant, then after a certain amount of time, having destarched the plant before, one should measure the energy content of the plant in joules (given by one of the previous questions) - greater energy content implies more photosynthesis.
1
reply
DanCantDraw
Badges: 3
Rep:
?
#49
Report 9 months ago
#49
(Original post by cieloceleste)
i wrote about keeping the plant in a dark cupboard and later testing it for starch
yes same omg i'm so relieved
0
reply
DanCantDraw
Badges: 3
Rep:
?
#50
Report 9 months ago
#50
(Original post by mrbubbles123)
It was runners, because thats what strawberries use for asexual reproduction. Maybe you weren't taught that

Anyone else think that the first paper was actually much harder?
Couldn't stems also be considered because of cuttings?
0
reply
DanCantDraw
Badges: 3
Rep:
?
#51
Report 9 months ago
#51
I don't think so, since yeast are single celled and spores is related to mycelium, which is another fungi structure. Honestly I just put the conditions of the ferment and putting a nutrient medium :'D
(Original post by cr_13)
Was it restriction and ligase enzymes for putting the plant pesticide in the yeast cell? And how the hell does one grow yeast cells in a fermenter (to do with spores I presume?)?
0
reply
Luka8
Badges: 1
Rep:
?
#52
Report 9 months ago
#52
Guys plz anyone if you can mention all skin questions ?
0
reply
LisaR2016
Badges: 7
Rep:
?
#53
Report 9 months ago
#53
I thought the exam was so bad and not enough of the specification covered. I focused on everything but plants 😩 I’m so gutted.
1
reply
ahlblbbb
Badges: 1
Rep:
?
#54
Report 9 months ago
#54
(Original post by LisaR2016)
I thought the exam was so bad and not enough of the specification covered. I focused on everything but plants 😩 I’m so gutted.
Same... I'm so dead inside now. I saw ppl saying how good it was and immediately i know how badly im screwed...
0
reply
LisaR2016
Badges: 7
Rep:
?
#55
Report 9 months ago
#55
(Original post by ahlblbbb)
Same... I'm so dead inside now. I saw ppl saying how good it was and immediately i know how badly im screwed...
Same!! Plants I didn’t really bother to revise and as I’m a mature student I did it all myself with science with hazel so I messed up on all the experiment questions!
The only question I know I did ok with was the eutrophication and that was only a 3 marker!
I think at most I got about 12 marks 😥😥😥
0
reply
amazingfcb
Badges: 11
Rep:
?
#56
Report 9 months ago
#56
(Original post by LisaR2016)
Same!! Plants I didn’t really bother to revise and as I’m a mature student I did it all myself with science with hazel so I messed up on all the experiment questions!
The only question I know I did ok with was the eutrophication and that was only a 3 marker!
I think at most I got about 12 marks 😥😥😥
Don’t worry
Grade boundaries are going to be like 115 for an A* as my biology teachers said that it was a weird pair of papers
1
reply
LisaR2016
Badges: 7
Rep:
?
#57
Report 9 months ago
#57
(Original post by amazingfcb)
Don’t worry
Grade boundaries are going to be like 115 for an A* as my biology teachers said that it was a weird pair of papers
I’m worried I’d even get a C, I honestly messed up that paper so bad!
Paper 1 I think I did ok, maybe 50 percent... 😩
0
reply
ahlblbbb
Badges: 1
Rep:
?
#58
Report 9 months ago
#58
(Original post by LisaR2016)
Same!! Plants I didn’t really bother to revise and as I’m a mature student I did it all myself with science with hazel so I messed up on all the experiment questions!
The only question I know I did ok with was the eutrophication and that was only a 3 marker!
I think at most I got about 12 marks 😥😥😥
Yes!!! I didn't think of those plants at all. That energy experiment I got completely messed up! I just hope I can get a B, that's all I wish.
0
reply
Jadelrx
Badges: 9
Rep:
?
#59
Report 9 months ago
#59
What did everyone put for the colour change in the tubes for orange to red? And the independent variable?
0
reply
mundosinfin
Badges: 17
Rep:
?
#60
Report 9 months ago
#60
(Original post by cieloceleste)
starch and sucrose
what did u write?
I put the same
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

University open days

  • Solent University
    Postgraduate and Professional Open Evenings Postgraduate
    Mon, 25 Mar '19
  • Cardiff University
    Undergraduate Open Day Undergraduate
    Wed, 27 Mar '19
  • University of Portsmouth
    Postgraduate and Part-Time Open Evenings Postgraduate
    Wed, 27 Mar '19

Where do you need more help?

Which Uni should I go to? (134)
18.23%
How successful will I become if I take my planned subjects? (73)
9.93%
How happy will I be if I take this career? (127)
17.28%
How do I achieve my dream Uni placement? (105)
14.29%
What should I study to achieve my dream career? (72)
9.8%
How can I be the best version of myself? (224)
30.48%

Watched Threads

View All