(i) Gene: Gene is the unit of the genome, consisting of a sequence of DNA that occupies a specific position (locus) on a chromosome and determines a particular characteristic in an organism. 

Genome: Genome is the total genetic information or all the genes contained in a haploid set of chromosomes in eukary otes, in a single chromosome in bacteria, or in the DNA or RNA of viruses. 

(ii) Multipotent: These cells have the ability to differen-tiate into many of the various type of specialized cell types and can develop into any cell of a particular group or type. e.g., umbilical cord stem cells. Unipotent: These cells can undergo unlimited reproductive divisions, but can only differentiate into a single type of cell or tissue, e.g., skin cells. 

(iii) Galactose: It is a part of disaccharide that is made- up of two sugars. It is found in milk alongwith glucose. Galactose does not occur freely in nature. It is produced in the body during the digestion of disaccharide lactose. Glycine: Glycine is a neutral amino acid and one of the 20 building blocks of protein. It is a non-essential amino acid, used in purine synthesis, and is a neurotrans¬mitter. 

(iv) Batch culture: It is a type of culture in which nutrients are fed continously depending upon the amount consumed without removing growth products.

Continuous culture: It is a open type of culture in which nutrients are supplied from time to time alongwith removal of product in same volume. 

(v) Coding region: Coding region (exon) is a part of the DNA that actually codes for a protein. 

Non-coding region: Non-coding region (introns) is that part of DNA that does not code directly for a protein.