Biology MCQ thread..!!

[MidoTheHawk]

Can anyone give me the correct answer with an understandable explanation please?

Winter/Oct/Nov 2008, No. 18

 

[lychee26]

A right ?

 

[histephenson007]

Answer is A.

As the question mentions, substance X replaces telomeres which help DNA replication. So, when substance X is present, the telomeres are continually replaced. So, DNA replication proceeds normally.

But, when Substance X isn't present. Some of the telomeres will be lost each time mitosis occurs. Eventually, there won't be any telomeres. So, DNA replication STOPS!

 

[histephenson007]

I'm gonna sleep now¬
Good luck everyone!!!!
Godspeed
:Bravo: :Bravo: :Bravo:

 

[mrpaudel]

oh right, i didnt read abt the plant cell :$ thnks

hit the thanks button if that helped u!!

 

[Xthegreat]

q18 plz!!!
http://www.xtremepapers.me/CIE/Internat ... _qp_12.pdf

the answer is D.
cause they will always cause a change in the tertiary. quaternary is not necessary present in enzymes, so the ALWAYS is tertiary.

 

[arsimme]

can anybody explain mj 07 question 26 ? plz

 

[mrpaudel]

if soil water will b more negative than xylem..that water doesnot move inside....this is done bcoz of salty water...due to this....option A and B are eliminated..now the water potential cannot b zero in xylem..!! thus anaswer is D

 

[arsimme]

r u nepali ?

 

[mrpaudel]

yeah man!!

 

[zxc1230]

Which statement describes a cell that is capable of reproduction and belonging to a haploid
organism?
A It has chromosomes that contain one polynucleotide chain.
B It is capable of carrying out a reduction division to form gametes.
C It possesses two copies of each gene as a result of fertilisation.
D It will undergo cell division by mitosis during asexual reproduction

 

[arsimme]

yeah man!!

lol m not man...m a girl. i m also frm nepal but currently staying in saudi arab

 

[arsimme]

I need explanation for ON 07 question 1

 

[mrpaudel]

measure the diagram vertically...!! ..!! and write that reading..!! this is what u measured...suppose u got 3cm here..

then, put the scale in the line where it has said scale bar..measure and conclude what is the measured value for length of 2nm....lets say u got that line around 0.5cm..then...0.5cm=2nm so 3cm=12nm..u can get this way!! and sorry gal( for the word man..lol!!)

 

[arsimme]

lol its al right....

 

[arsimme]

Golgi body makes enzymes or rough ER ?

 

[mrpaudel]

 

[mrpaudel]

goldi bodies...as goldi bodies manufactures lysosome..

 

[lychee26]

Which statement describes a cell that is capable of reproduction and belonging to a haploid
organism?
A It has chromosomes that contain one polynucleotide chain.
B It is capable of carrying out a reduction division to form gametes.
C It possesses two copies of each gene as a result of fertilisation.
D It will undergo cell division by mitosis during asexual reproduction

is it D ?

 

[mrpaudel]

Which statement describes a cell that is capable of reproduction and belonging to a haploid
organism?
A It has chromosomes that contain one polynucleotide chain.
B It is capable of carrying out a reduction division to form gametes.
C It possesses two copies of each gene as a result of fertilisation.
D It will undergo cell division by mitosis during asexual reproduction

i think its D