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Search results
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Physics MCQs thread.
- histephenson007
- Post #472
- Forum: A-Levels
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Biology MCQ thread..!!
The question states that after the 4th year, the plants are plowed into the soil. Which means that, all the minerals in the plants are added back into the soil through decomposition. Since it is a leguminous plant, it has rhizobium in its root nodules. So, there must be nitrogen fixation...- histephenson007
- Post #60
- Forum: A-Levels
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Biology MCQ thread..!!
Answer is D. Firstly, options A and B are surely cancelled because primary structure cannot be changed by any external influences like binding of an oxygen molecule. In one haemoglobin molecule, there are 4 polypeptide chains. Each with one haem group which can bind with an oxygen molecule...- histephenson007
- Post #59
- Forum: A-Levels
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Biology MCQ thread..!!
I hate transpiration!! but, I'd go with C- histephenson007
- Post #58
- Forum: A-Levels
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Biology MCQ thread..!!
I think the problem with B is that they haven't mentioned how long the fatty acid chains are. So, if a trigyceride has 3 short fatty acid chains and the phospholipid has 2 very long fatty acid chains, the phospholipid molecule is very capable of having more amount of hydrogen atoms that the...- histephenson007
- Post #56
- Forum: A-Levels
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The Banning Game(ALL please join in)
ibadsiddiqi is banned for posting exactly 333 posts- histephenson007
- Post #2,040
- Forum: Games and Fun Stuff
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Biology MCQ thread..!!
@aquariangurl The statement was : C A change in pH can cause an enzyme to be inactivated. As you yourself have agreed, an extreme change CAN cause an enzyme to be inactivated.- histephenson007
- Post #43
- Forum: A-Levels
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Biology MCQ thread..!!
but the statement doesn't mention that there are a limited number of enzymes. So lets think that there is a constant amount of enzymes. starting from zero substrate concentration, if we increase the substrate concentration, the rate of reaction is going to increase. cuz more substrate molecules...- histephenson007
- Post #38
- Forum: A-Levels
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Biology MCQ thread..!!
why is it true?? An enzyme's activity is supposed to increase when the substrate concentration is increased- histephenson007
- Post #35
- Forum: A-Levels
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chem p12...hmm that was a tough one !!!
Why're u writing that in chemistry thread??- histephenson007
- Post #314
- Forum: A-Levels
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chem p12...hmm that was a tough one !!!
What was the answer for why Aluminium oxide was able to dissolve in NaOH???- histephenson007
- Post #201
- Forum: A-Levels