*Biology Paper 5 tips*

[Alice123]

what are the advantages of immobilised algae???

 

[Ahmad Zaeem]

what are the advantages of immobilised algae???

Immobilised Algae ??? ...never heard that before ......is there any qs in Past paper regarding it .....i guess it could be used for metal extraction .not sure though ....can you give any reference?..

 

[Jinkglex]

Only thing i can think of is you can relate it to immobilized enzymes, and the benefits of those are more resistance to pH and temperature changes, and no contamination.

what are the advantages of immobilised algae???

 

[Alice123]

Immobilised Algae ??? ...never heard that before ......is there any qs in Past paper regarding it .....i guess it could be used for metal extraction .not sure though ....can you give any reference?..

http://papers.xtremepapers.com/CIE/...nd AS Level/Biology (9700)/9700_nos_ps_13.pdf
page22

 

[Alice123]

Only thing i can think of is you can relate it to immobilized enzymes, and the benefits of those are more resistance to pH and temperature changes, and no contamination.

those are for immobilised enzymes
i got others for immobilized algae

• high biomass loading capacity
• high transparency
• absence of toxicity to the algal balls
• suitable for simple immobilization procedures
• optimum diffusion of nutrients and products
• resistance to abrasion
• maximum surface-to-area volume
• mechanical stability
• sterilizable

i guess these are enough

 

[Ahmad Zaeem]

those are for immobilised enzymes
i got others for immobilized algae

• high biomass loading capacity
• high transparency
• absence of toxicity to the algal balls
• suitable for simple immobilization procedures
• optimum diffusion of nutrients and products
• resistance to abrasion
• maximum surface-to-area volume
• mechanical stability
• sterilizable

i guess these are enough

did you googled it or you just figured it out ???

 

[Ahmad Zaeem]

Immobilised algae also help to

• standardise the amount of photosnthetic tissue in any investigation
• and its easy to keep alive for several weeks for future exps

 

[biba]

knowitall10 JAZAKALLAH!
may ALLAH bless u!!!!
and u always make me lyk u even more
y dont u take physix (^__^)

 

[knowitall10]

knowitall10 JAZAKALLAH!
may ALLAH bless u!!!!
and u always make me lyk u even more
y dont u take physix (^__^)

Thank you! Wa iyyaki
and I'm pleased to be liked by you....it makes me like you as well
Oh, Physics is one thing that gave me brain strokes in IGCSE so i was happy to drop the pathetic subject

 

[xhizors]

Biology Students:
Soldier313 xhizors dornam PhyZac gary221 sumaiyarox:) Irfan1995 MaxStudentALevel cyclone94 Emma13 Ariel Robert
geek101 xtremeforums dragoninja98 Zari @everyone taking biology

no i dont take bio lol

 

[knowitall10]

no i dont take bio lol

Oh ok

 

[Alice123]

did you googled it or you just figured it out ???

googled it

 

[Ahmad Zaeem]

googled it

Well this is what i found from course book ....
Immobilised algae also help to

• standardise the amount of photosnthetic tissue in any investigation
• and its easy to keep alive for several weeks for future exps

 

[knowitall10]

Well this is what i found from course book ....
Immobilised algae also help to

• standardise the amount of photosnthetic tissue in any investigation
• and its easy to keep alive for several weeks for future exps

 

[Alice123]

There isnt anything about the reflexes section(from the syllabus) in my book.... Can anyone give a link to the coursebook??... its not available in our country

 

[knowitall10]

There isnt anything about the reflexes section(from the syllabus) in my book.... Can anyone give a link to the coursebook??... its not available in our country

Which is the reflexes section?

 

[Alice123]

Practical 14 - Reflexes
(e), (f), (g) • Identify the independent
and dependent
variables
• Formulate a hypothesis
and express this in
words and graphically
• Experience relevant
methods, analysis,
conclusions and
evaluation
• Describe and explain
the reflex arc that
occurs during a kneejerk
reflex, swallowing
reflex, iris reflex and
blinking reflex
• Evaluate the
procedure, discussing
why it is difficult to
quantify this
investigation
Using a tendon hammer
and working in pairs,
students should test each
others knee-jerk reflexes
by tapping the joints just
below the knee, and then
the ankle. Students should
compare the intensity of
the reactions from the knee
and ankle.
Students can also observe
that it is virtually impossible
to swallow twice in rapid
succession unless liquid is
present in the mouth.
Students should try to
explain the reflex which the
liquid induces.
Students can observe one
another’s eyes to note the
change in the iris when
their partner looks toward a
light then try to explain the
reflex arc that occurs.
Students should try and
explain the reflex arc that
occurs when a person
claps their hands in front of
another’s face, causing
them to blink.

 

[Ahmad Zaeem]

Which is the reflexes section?

she means to say experiments regarding cranial reflexes, pupil reflexes , knee jerk , reflex arc etc ..!!!....i wonder if they ever came in Cambridge exams ...

 

[knowitall10]

she means to say experiments regarding cranial reflexes, pupil reflexes , knee jerk , reflex arc etc ..!!!....i wonder if they ever came in Cambridge exams ...

yeah... Alice123 this never came up in p5's...

 

[Ahmad Zaeem]

There isnt anything about the reflexes section(from the syllabus) in my book.... Can anyone give a link to the coursebook??... its not available in our country

try consulting Olevel's biology (fedral)...