The noun DNA (or deoxyribonucleic acid) is an uncountable noun, a word for a substance.
no. bacteria will contin protein, but protein itself is not a bacteria.
A protein.
protein
What is inner membrane protein and outer membrane protein How can you get membrane protein from Ecoli and how to separate the inner and outer membrane protein.
countable
countable
The noun 'hill' is a countable noun. The plural form is 'hills'.
cookies are countable unless you have brain problems
countable
Prawn - prawns is the plural - is a countable noun
Shark is a countable noun.
Duck as an animal is countable, but if you mean the meat it is uncountable.
Countable
few is countable
countable
The word hair can be both a countable noun and a non countable noun, depending on how it is used. For example in the sentence "Mary has long blonde hair", it is non countable. In the sentence "Dad is getting a few gray hairs" it is countable.