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What are the different protein structures?

There are 4 levels you use to describe protein structure. Primary Structure - This is the simplest structure of a protein. It is essentially the sequence of amino acids that form a protein. Secondary Structu...
NP
Answered by Nandesh P. • Biology tutor
4919 Views

To what extent do the structures and functions of DNA and RNA differ?

Firstly, there are chemical differences between the two nucleic acids. DNA has the following structural properties:-double stranded and anti-parallel polymer held together by (relatively) weak hydrogen bonds...
AW
Answered by Adam W. • Biology tutor
5126 Views

What is the difference between viral antigenic drift and antigenic shift?

Both antigenic shift and drift are used by viruses to adapt to selection pressures and avoid host immune systems. Antigenic shift is a slow change in the viral genes over time due to replication errors and r...
SW
Answered by Sophie W. • Biology tutor
13272 Views

How is an electrical impulse transmitted through the heart?

Contraction of the heart is myogenic meaning it initiates from within the heart muscle itself (myo=muscle, genic= created). Therefore, no extra nerves need to signal the heart to contract which is important ...
RZ
Answered by Rebecca Z. • Biology tutor
19756 Views

Name the three components of a nucleic acid

pentose sugar and phosphate group backbone nitrogenous base
GS
Answered by George S. • Biology tutor
4758 Views