07/12/19

Can the RNA in the HIV virus make viral enzymes without entering the nucleus?
If the provirus was not formed yet, can the virus make viral enzymes? (I know that it already has some, but supposing it doesn't)
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07/12/19

Can living cells be imaged with electron microscopy?
According to this article from October 2009, http://news.mit.edu/2009/electron-microscope > "Electron microscopes are the most powerful type of microscope, > capable of distinguishing even... more
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07/12/19

biology true or false answers only

Codominance occurs when, essentially, there is no recessive allele.
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07/11/19

Eye drops came to mouth through eyes?
I was using eye drops for allergy, after some time felt bitter taste in my mouth. I unknowingly consumed a little of it. So generally is it OK to consume nasal, eye, ear drops that come in mouth... more
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07/11/19

How do drug companies know how to produce a generic drug?
Do the original companies have to reveal their manufacturing process to the public before they sell the drugs and the other companies can copy from them after their patent is expired?
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07/11/19

Do kids need vitamins?
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07/11/19

Effects of taking 1800mg of ibuprofen at once?
I took one and I waited about 15 to 30 min and then I took two more. Each pill is 600mg. Altogether it is 1800mg in 30 minutes time. Could something happen? If not, could something happen if I... more
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07/11/19

How can I make sure my UV-purificator kills bacteria?
I'm going to show a UV-purificator for water on science fair. How can I easily check if purificator kills most of the bacteria? I need a quick and possibly easy method.
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07/11/19

Horizontal Gene Transfer?
I understand the different ways bacteria can undergo horizontal gene transfer (transformation, transduction (phages), conjugation (plasmids)). Is there an experimental method to tell how a... more
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07/11/19

What is the IUPAC nomenclature of alkane with large numbers of C atoms (more than 200)?
What is the IUPAC nomenclature for alkanes with large numbers of $\\ce{C}$ atoms (more than 200)? For example, what is the IUPAC accepted name for $\\ce{C_{205}H_{412}}$?
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07/11/19

Chem 111 heLP !
Methane gas is compressed from 20L to 2.5L at a constant temperature. The final pressure is 12.2atm. What was the original pressure?
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07/09/19

Atomic structure
The circumference of second orbit of h atom ,if wavelength of electron is5×10`9
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07/09/19

True or False: Human beings, as we know them today, developed from earlier species of animals.
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07/08/19

The early stages of cleavage are characterized by what?
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07/08/19

What are the changes that occur during the metaphase of mitosis?
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07/08/19

A solution of 120 mL of 0.200 M KOH is mixed with a solution of 280 mL of 0.250 M NiSO4 Write the balanced chemical equation for the reaction that occurs. Answer as a balanced chemical equation.

A solution of 120 mL of 0.200 M KOH is mixed with a solution of 280 mL of 0.250 M NiSO4 Write the balanced chemical equation for the reaction that occurs. Answer as a balanced chemical equation.... more
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07/08/19

How do communities relate to food webs?
I am a biology student who has just completed drawing a food web for class. As I was making it, I learned that a food web is the sum of all feeding interactions. My teacher associated food webs... more
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07/07/19

How many human cells are there in our body, on average?
How many human cells are there in our body, on average? Wikipedia (http://en.wikipedia.org/wiki/Human_microbiome) says 10<sup>13</sup>:> Bacterial cells are much smaller than human... more
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07/07/19

A hypothetical nerve damage question?
If a 100 pound bucket is dropped on someone's hand, what will this do to the nerves, will they get crushed, will they die? And how will this affect that person's ability to feel or move their hand?
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07/07/19

DNA is charged negative. Where is all the positive charge in my body?
DNA is charged negative because of its phosphate backbone. Since charges need to be balanced (so that there are no charges building up somewhere), what is the positive charge which neutralizes this... more
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07/06/19

What is the purpose of ethanol in a DNA extraction experiment?
We were doing a lab experiment in biology class in which we extracted DNA from a banana-detergent solution mixture.(The detergent solution was made of 100ml of detergent, 90ml of water, and 5g of... more
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07/06/19

What is the purpose of ethanol in a DNA extraction experiment?
We were doing a lab experiment in biology class in which we extracted DNA from a banana-detergent solution mixture.(The detergent solution was made of 100ml of detergent, 90ml of water, and 5g of... more
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07/05/19

What is the most primitive animal?
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07/05/19

Why do branched chain compounds have lower boiling points than the corresponding straight chain isomers?
> The branched chain compounds have lower boiling points than the corresponding straight chain isomers. For example, > >- $\\ce{CH_3CH_2CH_2CH_2CH_3}$ - No branching-Pentane (n-pentane)... more
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07/04/19

Calculate the number of carbon atoms in 2*10^-4 moles of C6H6
Chemistry Ncert chapter 1 Some basic concept of chemistry
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