ALL CIE BIOLOGY DOUBTS HERE !!!

[HUSH1994]

MJ 2008 P1 Q21 & Q24,can anyone help me in this type of question,ive perfected everything else other than this pain,and is glycogen a poymer of alpha glucose or what?

Thanks

[Amelia]

Guys, someone make my day and reply with a 'no' to this question, do we need to know the structure of the trachea, cartilage and smooth muscle with all those amazing terms 'mucosa', 'chondrocytes', 'lacuna', 'cell nest', 'squamous pnemocyte type (1)' and 'secretory pnemocyte type (2)'?

No, you don't have to.

Did I make your day? 

[Amelia]

MJ 2008 P1 Q21 & Q24,can anyone help me in this type of question,ive perfected everything else other than this pain,and is glycogen a poymer of alpha glucose or what?

Thanks

Glycogen is a monomer of alpha glucose, yes.

You know about the complementary bases of DNA, right? Adenine binds with Thymine and Cytosine binds with Guanine. (This is for DNA.) The complementary base for Adenine in RNA is Uracil. So accordingly;

Q 21 - B. If you introduce a thymine molecule in the position 'B' the triplet in DNA will be ATC. The complimentary codon of ATC in RNA will be UAG (the stop codon).

Q 22 - D. The mRNA codons for the sickle cell heamoglobin has been listed. Now, you have to find the complementary codon of the tRNA that doesnot help in the making of sickle cell. The codon for tRNA D will be ACG - this is not listed as one of the anti-codons which forms sickle cell heamoglobin.

I hope you get it. 
 

[**RoRo**]

No, you don't have to.

Did I make your day? 

YOU DIIIIIIIIIIIIIIIIIIIID!! BIG TIME!!

So, in the chapter gas exchange, we're supposed to know:
-the adaptations of the alveoli as gaseous exchange surface
-inhalation and exhalation [what happens during them]
-definitions like tidal volume, residual volume, vital capacity, etc.
-tobacco smoke and COPD and the effect of nicotine, CO, etc.

that's it?

& what about 'epidemiological evidence' whether in this chapter or in the cardiovascular diseases, do we need to know that as well, as in would we be asked to provide such evidence?

[Amelia]

YOU DIIIIIIIIIIIIIIIIIIIID!! BIG TIME!!

So, in the chapter gas exchange, we're supposed to know:
-the adaptations of the alveoli as gaseous exchange surface
-inhalation and exhalation [what happens during them]
-definitions like tidal volume, residual volume, vital capacity, etc.
-tobacco smoke and COPD and the effect of nicotine, CO, etc.

that's it?

Yup, that's pretty much it.  

& what about 'epidemiological evidence' whether in this chapter or in the cardiovascular diseases, do we need to know that as well, as in would we be asked to provide such evidence?

Yes, you do need to know about that. You wont be asked to provide evidence but I think, the questions will as such the evidences will be provided and questions will be asked based on them. Get my point?

[**RoRo**]

Yup, that's pretty much it. 


& what about 'epidemiological evidence' whether in this chapter or in the cardiovascular diseases, do we need to know that as well, as in would we be asked to provide such evidence?


Yes, you do need to know about that. You wont be asked to provide evidence but I think, the questions will as such the evidences will be provided and questions will be asked based on them. Get my point?

So we basically just go through them to have an idea and in the exam it's all about applying your concepts according to the situation presented, right?

[Amelia]

So we basically just go through them to have an idea and in the exam it's all about applying your concepts according to the situation presented, right?

Right. (Y)

And don't worry. Tbh, Biology theory papers are easy enough. 

[HUSH1994]

MJ 2008 P1 Q21 & Q24,can anyone help me in this type of question,ive perfected everything else other than this pain,and is glycogen a poymer of alpha glucose or what?

Thanks

MJ 2008 P1 Q21 & Q24 please,and thanks for the ans Amelia

[Amelia]

MJ 2008 P1 Q21 & Q24 please,and thanks for the ans Amelia

I edited my above post, Hush. Check it out, I've answered. 

[**RoRo**]

Right. (Y)

And don't worry. Tbh, Biology theory papers are easy enough. 

Really? I hope to 'feel' that soon, I'm currently studying the entire syllabus throughly first and then I'll move on to past papers!

Thank you very much!

[HUSH1994]

Thanks alot Amelia +rep ,sorry for the trouble but can you explain the second question again ;(

[HUSH1994]

Anyone can help with the diagram in MJ 2005 Q4. part c please?

[Most UniQue™]

Anyone can help with the diagram in MJ 2005 Q4. part c please?

which paper?

[HUSH1994]

Paper 2

[Most UniQue™]

Paper 2

theres no 4c! maybe u r asking from the a-level pastpaper? Im studying IGCSE