Biology MCQ thread..!!

[MHHaider707]

Does lysosome contain nucleic acid??

 

[sweetiepie]

yeah only golgi apparatus does not contain nucleic acid...

 

[melon159]

nucleic acids are DNA and RNA????????

 

[sweetiepie]

yeah it is....

 

[Xthegreat]

Hey can anyone please help me in O/N 04 P1 Q.38

Here's the link:

http://www.xtremepapers.me/CIE/Internat ... 4_qp_1.pdf


And in O/N 05 Q.27

http://www.xtremepapers.me/CIE/Internat ... 5_qp_1.pdf

Q38.
the ans is D because plants respire in order for photosynthesis to occur
photosynthesis helps them grow
and and the chemical reactions of photosynthesis are the 'other life processes'

Q27.
ans is D
low atmospheric humidity leads to a great difference in the water potential of plants and atmosphere
low soil water potential, means very little water in the soil
wind speed high creates a low atmospheric humidity ( this one works just like the evaporation of water )

 

[histephenson007]

Need some help..

 

[MHHaider707]

But em confused about that Q.27 of O/N 05 coz in Q it says that 'in which combination of conditions the stomata are most likely to close'
so according to that wind speed should be low and atm. humidity should be high........right???

 

[sweetiepie]

becox of steepnees of concentration gradient ....

 

[MHHaider707]

Need some help..

Is it B???...coz in the presence of non-competitive inhibitor, the rate of reaction levels earlier!!

 

[sweetiepie]

hmm itx B....

 

[histephenson007]

yea, rite!!

 

[MHHaider707]

becox of steepnees of concentration gradient ....

But i din get it!!

 

[histephenson007]

This seems easy, but I still get it wrong everytime!

 

[sweetiepie]

hmm then i cant explain more m sorriee.....

 

[sweetiepie]

B....ANSWER...

 

[histephenson007]

No, the mark scheme says its C...
my answer was D ... - -

 

[sweetiepie]

hmm okay..!!

 

[histephenson007]

becox of steepnees of concentration gradient ....

But i din get it!!

Stomata close when the rate of transpiration is too much. (and the supply of water is low)

you just have to find a set among those which satisfy the requirement

 

[MHHaider707]

Yeah the answer C is rite coz malaria cannot pass directly from mother to child!!!!

B....ANSWER...

It says least likely!!!
HIV is most likely!!

 

[MHHaider707]

becox of steepnees of concentration gradient ....

But i din get it!!

Stomata close when the rate of transpiration is too much. (and the supply of water is low)

you just have to find a set among those which satisfy the requirement

Thanx histephenson007!!!!