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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 cannot b...
JW
Answered by Jade W. • Biology tutor
11638 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 unwinds t...
JT
Answered by Jamie T. • Biology tutor
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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 de...
CC
Answered by Corey C. • Biology tutor
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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: MiTosis - (with...
MB
Answered by Maria B. • Biology tutor
17385 Views

Explain why maltose can only be broken down by the enzyme maltase.

The active site of an enzyme is complementary (meaning, it fits perfectly) to a substrate (in this can the substrate being maltose). Once the maltose and maltase combine to form the enzyme-substrate complex,...
BP
Answered by Bradley P. • Biology tutor
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