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Biology
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How does the Meselson and Stahl Experiment provide evidence for the semi conservative theory of DNA replication?

Before we start on the specifics of the experiment itself we need to understand how DNA replication occurs on a molecular level. DNA is made up of four different bases; A, C, G and T....

JD
Answered by Julia D. Biology tutor
25158 Views

One form of muscle disease is caused by a mutant myosin allele. It prevents myosin from binding to other myosin molecules, thus preventing contraction. Suggest why.

Sarcomeres are formed of myosin and actin filaments which are interleaved. If myosin cannot bind to each other then thick filaments cannot be formed. Thus, there is nothing to anchor myosin so actin canno...

JW
Answered by Jade W. Biology tutor
10563 Views

How is mRNA produced in the nucleus of a cell?

Genes in DNA encode protein molecules. The first step of expressing a gene is transferring the information in DNA to a messenger RNA (mRNA) molecule, by a process called transcription. DNA Helicase unwind...

JT
Answered by Jamie T. Biology tutor
42596 Views

How does the body increase heart rate in response to exercise?

Heart rate is controlled by the AUTONOMIC nervous system. This is the branch of the nervous system which does NOT require voluntary thought and action, unlike the SOMATIC branch. This means it relies upon...

CC
Answered by Corey C. Biology tutor
25642 Views

What is the difference between Mitosis and Meiosis?

These processes are easily mixed up. Both Mitosis and Meiosis are typed of cell division, but the 2 processes end up with different results!

I always find it helpful to think of it like this:

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MB
Answered by Maria B. Biology tutor
16494 Views

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