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70s and 80s are two types of ribosomes, 70s are smaller and are present in bacteria ( i think ) and 80s are larger and present in animals.
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yeah you're right hehe , but what does the S mean 0.o?70s and 80s are two types of ribosomes, 70s are smaller and are present in bacteria ( i think ) and 80s are larger and present in animals.
which year?? :/Can some one please explain question 30 p1 Maj/June variant 2 ?
Oh I forgot that , it's 2012which year?? :/
Oh I forgot that , it's 2012
So the stroke volume is not directly proportional to the ventricular end-diastolic volume , okay I got it , thanks a lot for the helpThe confusion may arise between C and D....
The stroke volume depends on the contraction of the cardiac muscles....
So the muscles cannot exert a infinite amount of pressure....
Cause their strength of contraction is limited by the ATP formed in the muscle tissues....
Therefore the volume pumped out by the muscles of the heart increases initially as ventricular end-diastolic volume increases....
But after reaching a maximum point it, does not increase anymore, as the muscles do not have the strength to pump out more blood out of the ventricles...
therefore, answer is D
well, the key is to figure out that A is an RBC and we know that the lumen of a cappilary very comparable to the diameter of an RBC, therefore the vessel is a cappilary.can someone please explain how the features of this blood vessel make a capillary ?? It's in question paper Maj/June 2012 variant 3 paper 2 question 1
Y
yeah you're right hehe , but what does the S mean 0.o?
If the air inhaled is less than the air exhaled, then you will exhale more than you inhale, so eventually, you should completely run out of air, right?So w
so what you mean is the volume of air exchanged is the also the volume of air inhaled? but how can the air inhaled be equal to the air exhaled shouldn't it be less ? X_X
S is the Svedberg unit. It refers to the rate of sedimentation during centrifugion. In a 70S ribosome, there is a small ribosomal unit (30S) and a large unit (50S). If you add them up, you get 80S. If you take a little bit of physics, you will know that the size is not proportional to the centripetal force, so if you add up all the components, you won't get the total "size".What do they mean when they say 70S for ribosomes? what's the meaning of the "S"?
Introductory notes:describe the processes that affect allele frequencies in populations with reference to the global distribution of malaria and sickle cell anaemia;
Use sickle cell anaemia as an example to illustrate and discuss how one genotype may be fitter than another when a particular environmental factor (infection with Plasmodium) is exerting a strong selection pressure
anyone please? im reposting again
Thanks for the help , I didn't even figure out it's a RBC , I know a rbc is biconcave , but it looks to me like a triangle more than anything XSwell, the key is to figure out that A is an RBC and we know that the lumen of a cappilary very comparable to the diameter of an RBC, therefore the vessel is a cappilary.
Thanks a lot for the info.S is the Svedberg unit. It refers to the rate of sedimentation during centrifugion. In a 70S ribosome, there is a small ribosomal unit (30S) and a large unit (50S). If you add them up, you get 80S. If you take a little bit of physics, you will know that the size is not proportional to the centripetal force, so if you add up all the components, you won't get the total "size".
Oops my bad I meant shouldn't be More , but I think I got it , so the volume remains equal but the composition of air changes right?If the air inhaled is less than the air exhaled, then you will exhale more than you inhale, so eventually, you should completely run out of air, right?
In order to maintain a constant lung volume, the air inhaled must equal the air exhaled.
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