A Challenge Question! [May 2004] (1 Viewer)

[Calculon]

Aerobic (which requires oxygen and produces 36 molecules of ATP for every molecule of glucose) and anaerobic respiration(which does not require oxygen and produces 4(or 2, cant remember) molecules of ATP per molecule of glucose and produces lactic acid as a by product)

 

[Survivor39]

Originally posted by Calculon
Aerobic (which requires oxygen and produces 36 molecules of ATP for every molecule of glucose) and anaerobic respiration(which does not require oxygen and produces 4(or 2, cant remember) molecules of ATP per molecule of glucose and produces lactic acid as a by product)

hmmmm......We refer those two as cellular respiration (as you have said for aerobic) and fermentation for anaerobic (You should have learned that in chemistry)

Question:
Which of the following components is present in a prokaryotic cell?
a. Mitochondria
b. Ribosomes
c. Nuclear envelope
d. Cholroplast
e. ER

Which TWO of the following organells is least closely associated with the endomembrane system?
a. Nuclear envelope
b. Cholroplast
c. Golgi body
d. Plasma membrane
e. ER
f. Peroxisome
g. Lysosome

 

[Calculon]

1. b
2. no idea

 

[Survivor39]

Originally posted by Calculon
1. b
2. no idea

Ok, let me teach you something
The endomebrane system are those organelles that are bounded by only ONE membrane. Now you should be able to answer question 2.

Your answer for Q 1 is correct.

 

[xiao1985]

lolz... cal should adjust his uai target... i reckon he's gonna be among the high 99's =p

 

[Calculon]

Originally posted by xiao1985
lolz... cal should adjust his uai target... i reckon he's gonna be among the high 99's =p

I would seriously doubt it. Why are so many people saying that now?

 

[babydoll_]

Why are you aiming lower? If you aim higher you'll have better motivation

 

[Calculon]

Originally posted by babydoll_
Why are you aiming lower? If you aim higher you'll have better motivation

Because lower is where I fall if I'm lucky. And I also don't wanna convince myself that I'm gonna get 99.xx and kill myself when I get 97.

 

[~*HSC 4 life*~]

well this thread just makes me want to cry

 

[Calculon]

Originally posted by ~*HSC 4 life*~
well this thread just makes me want to cry

then dont look at it, it belongs to me and queenie

 

[~*HSC 4 life*~]

Originally posted by Calculon
then dont look at it, it belongs to me and queenie

technically it belongs to the thread starter...but anyway

 

[Collin]

Originally posted by Survivor39
fat is made up of glyerol and three fatty acids, forming a triglyeride, or triacylglyerol.

Not all fat consists of glycerol and three fatty acid components. Only triacylglycerols fits this criteria. Another type of fat, for example phospholipids (which are defined as a complex fat as opposed to simple ones such as triaclyglycerols) contain two fatty acids and a single phosphate group.

 

[TheKing]

hm...... no more new questions?
and i was just getting excited

 

[Survivor39]

Originally posted by TheKing
hm...... no more new questions?
and i was just getting excited

Oops, i didn't know it got moved here.

I think this is an interesting question:

In protandrous hermaphroditism
a. some individuals may change from male to female.
b. individuals fertilise themselves.
c. males rather than females release pheronmones.
d. diploid ova are produced.
e. the adult gonads are undifferentiated.

If you don't know the answer, still take an educated guess.

 

[TheKing]

frogs.....
or maybe seahorses....

 

[malkin86]

I think the answer is A..

 

[Survivor39]

Originally posted by malkin86
I think the answer is A..

well done malkin86

Here's an eeeasy one.
Expression of a cloned eukaryotic gene in a prokaryotic cell involves many difficulties. The use of mRNA and reverse transcriptase is part of a strategy to slove the problem of:

a. Post-transcriptional processing
b. electroporation
c. post-translational processing
d. nucleic acid hybridization
e. restriction fragment ligation

 

[TheKing]

A?
is it because procaryiotes do not have membrane bound organelles etc?

 

[Survivor39]

Originally posted by TheKing
A?
is it because procaryiotes do not have membrane bound organelles etc?

A is correct. But it;s not because prokaryotes do not have nuclear membrane. In a prokaryotical cell, there is no splicing of mRNA. therefore, a human gene,which contains both exons and introns, will not be spliced by the prokaryote. Therefore, introns are translated as well. So the protein made cannot be used.

With reverse transcriptase, we are able to find out the code for the exon of a particular genes. Insert this gene into a prokayote with restriction endonuclease and the bacteria will translate this with no problem.