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Break this question down into 2 halves to make it easier to answer:

1. "What is meant by 'active transport' " : Active transpor...

DNA is found in the nucleus of all human cells (except red blood cells). Its double-stranded, helical structure contains all of the information required for the body to produce new proteins- it simply nee...

There are four main differences; 1. DNA - Eukaryotes have linear DNA whereas prokaryotes have circular DNA. The DNA in eukaryotes is also protien bound, this is not the case in prokaryotes. 2. Organelles ...

Primary structure - a sequence of amino acids in a polypeptide chain. They are joined together by peptide bonds. The sequence of amino acids determines the rest of the proteins structures. Secondary struc...

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Sickle-cell anaemia is an inherited condition caued by a dominant allele.

Sickle cell anaemia is a disorder of the blood caused by an inherited abnormal haemoglobin the abnormal h...