06/24/19

Is there an enzyme for the transformation of the hydroxyl group?
I would like to know, is there any enzyme which does the transformation of hydroxyl group to any other functional group using the enzyme. The substrate is aromatic hydroxyl group. Product should... more
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06/24/19

In biosynthesis of cysteine and methionine, where does the sulfur come from?
Methionine and Cysteine are the two amino acids containing sulfur. [According to wikipedia, cysteine](https://en.wikipedia.org/wiki/Cysteine) is built from methionine. However, the wikipedia also... more
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06/23/19

Why arent mosquitoes found near neem trees?
I read an article yesterday that wherever neem trees or spices are cultivated mosquitoes are not seen there. So why arent mosquitoes seen near these places (neem trees , spices, etc).What is it... more
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06/23/19

In Glycolysis, where is Magnesium used as a cofactor? Why is it used?

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06/22/19

How can someone share 50% of their DNA with their parents yet all humans share 99.9%?
I have heard that humans share 99.9% of their DNA with other humans. I have also heard that a child shares 50% of their DNA with their parents. How do I resolve this apparent contradiction? It has... more
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06/22/19

algebra question

Which equation represents a line that passes through (5, 1) and has a slope of ?y – 5 = (x –1)y –  = 5(x –1)y – 1 = (x –5)y – 1 = 5
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06/21/19

Is there a reliable estimate of the number of cells on Earth?
A quick Google search didn't turn up any reliable sources. An awkward Cosmoquest thread (https://forum.cosmoquest.org/showthread.php?141294-How-many-living-cells-are-there-on-Earth) gives a rough... more
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06/21/19

What do sphingolipids do in humans?
I want to know the significance of sphingolipids in human. I have learnt that sphingomyelin is the most significant type of sphingolipid in human. Also that the sphingomyelin serves as a structural... more
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06/21/19

Multiplying on the TEAS test
What is the product of 0.7 and 0.6?A.) 4.2B.) 0.42C.) 0.042D.) 0.0042
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06/21/19

Fractions on the TEAS
Choose which answer correctly expresses 3/8 as a fraction.A.) 0.875B.) 0.657C.) 0.375D.) 0.300
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06/21/19

How to visualize the ECM?
Specifically, I'd like to look at changes in HA (hyaluronic acid) production. Most often you only see people staining the cell surface or removing cells from culture for fixation and then imaging.... more
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06/21/19

Using ion-exchange chromatography to purify DNA from a cell extract - Is DNA more negatively charged then RNA?
When applying this method we have a glass or plastic column of resin which is positively charged. Then we pour cell extract into the column in order to capture the negatively charged particles... more
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06/21/19

Is there a biological term for an activity period that is determined by temparature?
In general we refer to the activity period of organisms in terms of the period of the day that they are active. Diurnal, crepuscular, nocturnal, matutinal, and vespertine, for example. There are... more
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06/20/19

Why the term fifty-four forty was related to American expansion in the west?
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06/20/19

How are the physiological properties of mitochondria measured?
This is my first question on BiologySE. I am a Physics and Mathematics student currently doing a project on cell growth simulation. I am doing literature survey and I have a question about cellular... more
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06/20/19

Superhuman eyesight?
My ten year old son was reading car number plates that were too fast, too far away and at the wrong angle for any of us to read or even believe that it was possible for him to read. We thought he... more
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06/20/19

The elastic potential energy
A spring with 450 J of EPE has a spring constant of 100 N/m. How far must the spring be stretched?
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06/20/19

What is 12x²+20x-16

I it plz I'm in school rn to my assignment
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06/20/19

What kinds of cells does human saliva contain?
I have heard that our saliva contains cells. What cell types can be found in human saliva?
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06/20/19

What is meant by external fertilization?
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06/19/19

Louis bought 10 yd of material. He used 3 7/8 to make a jacket. How much fabric is still left?
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06/19/19

Creating a cell, not from another cell. Will it be possible?
If some time in the future, we can know exactly what a cell (for example simple prokaryote bacteria) contains, (I mean, exactly which molecules, the shape of them, the density of each, everything),... more
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06/19/19

Are there differing organelle to cytoplasm ratio in animal cells?
Could anyone provide me with examples of cells with high organelle to cytoplasm ratios (heavily packed), and examples of cells with low organelle to cytoplasm ratios (sparsely packed)?
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06/18/19

Difference between genetic engineering and synthetic biology?
I've recently seen the term *synthetic biology* being used to describe research involving genetic modification of organisms. What is the difference between *synthetic biology* and *genetic... more
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06/18/19

Can general soap kill bacteria?
I have read that general soap can kill bacteria by opening holes in the bacterial membrane.http://questions.sci-toys.com/node/90However, I found some articles as well saying that it... more
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