New answers tagged

1

I think we can look at it like this Your noncyclic pathway liberates 4H+ from two water molecules. We're doing that because to get one O2, you've got to split 2H2O. This happens in photosystem II. So in the next step (you know, really broadly) the electrons are passed to cytochrome b6-f complex, where each electron allows it to pump 2H+ into the thylakoid ...


2

Sorry for the poor quality of the image, but its just as a reference for my answer. You have made the question too complex. From the figure, we find that 1 H2O gives 2 H+ and 2 e-. 2 e-, through quinone cycle, provide 4 H+ i.e. total 6 H+ which form 6/3 = 2 ATP i.e. 1 H2O => 6 H+ => 2 ATP Multiply this equation by 8 and you get: 8 H2O => 48 H+ => 16 ...


2

There are species where cells and even whole organisms can go into a state called cryptobiosis where their metabolism is suspended but can be revived later. This usually happens when the conditions become too bad for survival (dry/cold etc.) and is reversed once the conditions improve again (rehydration warming up). One prominent and fascinating example are ...


3

From what I can tell, you are not including the probability of the grandfather being a carrier (it could be the grandmother who is the carrier). Calculation should go like: P(Child is born with disorder) = P(II-2 is carrier) * P(I-2 is carrier) * P(II-3 is carrier) * P(III-2 is carrier) * P(Child is homozygous recessive) P(Child is born with disorder) = ...


0

I'll try to dissect your teachers answer for you: 1/12*60=5 liter blood no explanation required here 0.55*5=2.75 liter plasma of blood. only the plasma is filtered in the kidney (the 45% cell content remains in the blood stream), so out of the 5 l blood, only 2.75 l need to be filtered. The plasma is filtered 60 times is 24 hours. (how did ...


2

The answer is #5, Leaflets folding after losing turgor pressure. This refers to a phenomenon called plasmolysis. 1 - positive phototropism, incorrect 2 - negative phototropism, incorrect 3 - gravitropism, incorrect 4 - thigmotropism, incorrect


3

Both genes and alleles are sequences of DNA. A gene will code for a trait, say hair colour, while an allele will be the variants of that gene (say the alleles coding for blonde, brown, black, and red hair). It's almost like cookbooks: two cookbooks (the DNA) might have a recipe (gene) for bread but they use slightly different instructions (alleles) ...


5

Alleles are basically subtypes of a gene. At the time of Mendel, the molecular nature of inheritance was not known so the original definition of gene refers to "some" inheritable molecular entity inside the organism that is responsible for a trait. Alleles are different "flavours" of a given gene. For example there is a gene for flower colour, there can be ...


5

The answer is incomplete dominance. It can't be codominance, because codiminance involves both phenotypes being expressed in different parts of the organism: you would end up with red and yellow spotted flowers. It obviously isn't complete dominance, because the red x yellow cross produces orange flowers. Knowing that it has to be incomplete dominance or ...



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