Biology MCQ thread..!!

[hassam]

COME ON OTHERS WHAT THE HELL U WAITNG FOR...ANSER ...THESE are soooo conFUsing !!!

 

[melon159]

do mitochondria and ribosomes contain nucleic acid??

 

[histephenson007]

do mitochondria and ribosomes contain nucleic acid??

yes

 

[Banglarbagh]

guyx......y this fukin thread is made if noone ansers......

chiilll bro tell me wch questons r nt answered..!! i can c mst of em answered.!

 

[hassam]

question on page 5??

 

[hassam]

hey......y dont u ppl anser........

 

[histephenson007]

I tried dude...

 

[Banglarbagh]

for 24. I gss this is the reason wy...

Transpiraton is the loss of wtervapor from plants. mst transpiraton hppns in leaves. a leaf contains many cells in cntct wth air spaces in messophyll layers. liquid water in the cell wall chnges to water vapor wch den diffuses into air spaces. the water vapor den diffuses out of the leaves tru the stomata dwn a water potential gradient..!!!

And other queston are answered hassam pls chek..!!!

 

[Xthegreat]

guyx......y this fukin thread is made if noone ansers......

just quite being mean and shut up.people will try to help if they know the answer.
you CAN'T blame people who view the forum but doesn't know the answer
and you CAN't blame people who know the answer but they don't view the forum.

it's a choice not a must, if people don't answer you, the most you can do is REPOST.

 

[RiseAgainst]

9 Which statement about triglycerides is correct?
A They are made up of three fatty acids combined with glycogen.
B They are more saturated with hydrogen compared with phospholipids.
C They form a bilayer in the membranes of cells.
D They have a lower ratio of oxygen to carbon compared with carbohydrates.
i know the D is anser bt wats wrong with option B

I'm not sure about this, but I think B is wrong because even though phospholipids have less hydrogens than triglycerides, they're still fully saturated!
They contain the greatest amount of hydrogen that they can.
I might be wrong though, I've still to revise this chapter.

 

[Banglarbagh]

 

[Banglarbagh]

 

[RiseAgainst]

Is it B?
I'll explain it if I'm correct.

 

[RiseAgainst]

Actually, I gotta go, so I'll explain it even if I'm wrong.
The way I worked it out is that the initial rate of reaction usually refers to the amount of product formed in the first 30 seconds.
So, in the first 30 seconds 3 cm^3 is formed.
However, the answers have units of s^-1, meaning you have to work out how much is produced per second.
30 seconds = 3cm^3, 1 second = 3/30 = 0.10cm^3

 

[melon159]

whats the ans for q.12?? cant figure out..

 

[workinghard]

i thnk da ans 2 12 is D... cux all da rest of da options r basically wrong... condensation is a anabolic process triglycerides r more energy value... n so on
correct me if i m wrong...!

 

[tasnim007]

9 Which statement about triglycerides is correct?
A They are made up of three fatty acids combined with glycogen.
B They are more saturated with hydrogen compared with phospholipids.
C They form a bilayer in the membranes of cells.
D They have a lower ratio of oxygen to carbon compared with carbohydrates.
i know the D is anser bt wats wrong with option B

Triglyccerides may contain ggreater no NUMBER of hydrogens, but are not necessarily more saturated with hydrogen,as in terms of percentage saturation per hydrocarbon tail. that's what i think.
hy4v.PNG---this one I didn't understand myself.
about Q28 i its probably something like there are four polypeptide chains in haemoglobin having each with one haem group, so when one of the haem groups are used the shape of the ploypeptide changes so as to make it easier for other polypeptides to get there haem groups.

 

[MidoTheHawk]

Can someone help with this one, please? The markscheme says that it is D, but why?! :Search:

It is for Winter/Oct/Nov 2010, 9700/12:

 

[draculavampira]

Is there anyone of you that know how I can find s02 or w02 MS? Thanks

 

[hassam]

see option D its glycerol....and glycerol is not found in amino acids