A level Biology: Post your doubts here!

[Kanekii]

what did to guys write about the respiratory system

Trachea- C shaped windpipe with cartillage
Bronchus-Structures with smooth muscles and some cartillage
Bronchiole-Does not contain cartillage and smooth muscle
Alveoli- Greater surface area for gaseous exchange, contains elastic fibres and collagen. Elastic fibres stretch to allow greater diffusion of gases

 

[Sammy1234]

For the question about Nicotine and when a person stops smoking what are the effects on the CV system - is decrease in Heart rate and decrease in blood pressure right?

 

[Sammy1234]

I also put decreases the risk of Thrombosis.

 

[M.@(-)M@D $0(-)@!L]

RER and Golgi Apparatus?

I wrote nuclear envelope and Golgi body? Is it correct??

 

[Sammy1234]

I wrote nuclear envelope and Golgi body? Is it correct??

that's right

 

[M.@(-)M@D $0(-)@!L]

I also put decreases the risk of Thrombosis.

yep all 3 are correct.

 

[Sammy1234]

What did u guys put for the properties of H2O that allow for apoplastic movement?

 

[Kanekii]

Also higher breathing rate and greater partial pressure of oxygen required for the same percentage haemoglobin saturation of the person who smoked joints.

 

[Kanekii]

What did u guys put for the properties of H2O that allow for apoplastic movement?

Water molecules attraced to each other
-cohestion between water molecules
-Adhesion to the cellulose cell wall
-For intercellular air spaces high latent heat of vapourisation

 

[Kanekii]

What were the advantages/use of monoclonal antibodies?

 

[{#}324354]

What did you write for that Mico mRNA thing?? They mentioned start codon as well within the question.

 

[Sammy1234]

Water molecules attraced to each other
-cohestion between water molecules
-Adhesion to the cellulose cell wall
-For intercellular air spaces high latent heat of vapourisation

Nice, that's what I put.

 

[angryrider_56]

i

For question 1 what 2 additional structures did u guys put?

wrote RER and Ribosomes but one of my friends said that i had to write 80S ribosomes because prokaryotes also have ribosomes so am not sure about that.....and btw plant cells have golgi apparatus?

 

[Sammy1234]

What did you write for that Mico mRNA thing?? They mentioned start codon as well within the question.

Translation does not occur as START codon is not initiated.
Proteins are not made .

But i'm not sure

 

[Kanekii]

What did you write for that Mico mRNA thing?? They mentioned start codon as well within the question.

Sadly that question of mine got left out didnt have time to complete it

 

[angryrider_56]

and guys....out of stress i missed up between adhesion and cohesion like i explained cohesion as if it was adhesion and explained adhesion as if it was cohesion.....how many marks will i lose :'(

 

[Sammy1234]

i

wrote RER and Ribosomes but one of my friends said that i had to write 80S ribosomes because prokaryotes also have ribosomes so am not sure about that.....and btw plant cells have golgi apparatus?

yes plants cells have golgi

 

[Sammy1234]

and guys....out of stress i missed up between adhesion and cohesion like i explained cohesion as if it was adhesion and explained adhesion as if it was cohesion.....how many marks will i lose :'(

It was 3 marks right?
Probably 1 mark, as long as you mentioned water has a high latent heat of vaporisation and another property.

 

[{#}324354]

Translation does not occur as START codon is not initiated.
Proteins are not made .

But i'm not sure

Isn't it that protein is made but the protein produced is different from the one that carries normal activity hence mechanism initiated. But I'm not quite sure of my answer either.

 

[Sammy1234]

What were the advantages/use of monoclonal antibodies?

I'm not sure, I just put produce a large quantity of antibodies that are specific to an antigen.