Biology Paper 1

[zainenayab]

Q6 was bacteria, not virus cause of the presence of DNA. I don't think virus not bacteria was given as an option

Viruses do have a DNA so the answer was virus in first column and not bacteria in second column (option D). Since it was clearly stated 'cells' and bacteria are unicellular so it can't be bacteria.

 

[zainenayab]

But why would I take it that way? What was the exact question? The firsts colomb said sectetion...what was written in the 2nd one?

First column said concentration and second one was about secretion and both vary and depend on blood's glucose concentration.

 

[danial 234]

Viruses do have a DNA so the answer was virus in first column and not bacteria in second column (option D). Since it was clearly stated 'cells' and bacteria are unicellular so it can't be bacteria.

u r wrong
ans was it could be bacteria but not virus
the organism was cellular and had dna
bacteria is also cellular and has dna. while viruses are sub cellular. they r not cellular

 

[Snowysangel]

Viruses do have a DNA so the answer was virus in first column and not bacteria in second column (option D). Since it was clearly stated 'cells' and bacteria are unicellular so it can't be bacteria.

What is wrong with you people? Virus DO NOT have a DNA...they just have a nucleic acid, no nucleoloid or nuclear membrane. Bacteria on the other hand have a circular lop of DNA

 

[zainenayab]

u r wrong
ans was it could be bacteria but not virus
the organism was cellular and had dna
bacteria is also cellular and has dna. while viruses are sub cellular. they r not cellular

I don't know about it but as far as i remember the organism had a DNA and virus has that so how can 'not virus' be correct?

 

[danial 234]

It was estrogen. Fsh was the curve which rose at the start of the period, while the uterine lining was still shedding. After the 7th day, estrogen level was supposed to increase but there was no curve depicting such a phenomenon

i think there was a error in hormone ques. if the curve was supposed to be oestrogen then why wont it increased in the last phase. and if it is supposed to be LH then why on earth would it start to rise on 8th or 9th day. the middle curve rose from 8 th or 9th day was at its peak on 15th and then decreased. the ans could be either oestrogen or LH

 

[zainenayab]

What is wrong with you people? Virus DO NOT have a DNA...they just have a nucleic acid, no nucleoloid or nuclear membrane. Bacteria on the other hand have a circular lop of DNA

http://en.wikipedia.org/wiki/Virus
Check out, virus has a DNA.

 

[danial 234]

I don't know about it but as far as i remember the organism had a DNA and virus has that so how can 'not virus' be correct?

but virus isnt made of cells. and if we talk abt dna then it is present in all virus, bacteria, fungi

 

[Snowysangel]

i think there was a error in hormone ques. if the curve was supposed to be oestrogen then why wont it increased in the last phase. and if it is supposed to be LH then why on earth would it start to rise on 8th or 9th day. the middle curve rose from 8 th or 9th day was at its peak on 15th and then decreased. the ans could be either oestrogen or LH

Estrogen builds up the uterine lining, progesterone maintains it. The level of estrogen decreases when the level if progesterone increases(& that always happens in the last phase)

 

[danial 234]

Estrogen builds up the uterine lining, progesterone maintains it. The level of estrogen decreases when the level if progesterone increases(& that always happens in the last phase)

what did u write in the ans

 

[danial 234]

i wrote LH

 

[Snowysangel]

http://en.wikipedia.org/wiki/Virus
Check out, virus has a DNA.

Oh yeah I got confused between nucleus and DNA. But bacterium has a loop of DNA as well...that's how it carries out its life processes. However, viruses aren't proper cells so its more lielt to have been bacteria, not virus

 

[Snowysangel]

what did u write in the ans

Oestrogen. Do you remember the exact question about DNA? :/

 

[danial 234]

the ques was
an organism has been found with a dna . it is made up of cells. which organism class can it belong to and which class it cant belong to

 

[danial 234]

what was the ans to the ques abt where does the placenta allows exchange. and what does ur teacher say abt the hormone ques

 

[Snowysangel]

the ques was
an organism has been found with a dna . it is made up of cells. which organism class can it belong to and which class it cant belong to

What were the other two choices? It's most definitely not virus since it doesn't have a cell mrmbeane and proper nucleus or anything, but do I remember the other possible answers?

 

[Snowysangel]

what was the ans to the ques abt where does the placenta allows exchange. and what does ur teacher say abt the hormone ques

Er schools off and it was umbilical cord

 

[danial 234]

i

Er schools off and it was umbilical cord

it was uterus wall

 

[Snowysangel]

i

it was uterus wall

But exchange of substances takes place in the umbilical arteries/vein

 

[danial 234]

i

But exchange of substances takes place in the umbilical arteries/vein

it only transports materials. it serves as artery , vein. the place is uterus where placenta is attached and exchange occurs ( the capillary area)