Gene Organisation; DNA & RNA Flashcards
1
Q
What is a Gene?
A
“A Unit of Inheritance”
A length of DNA that codes for the production of a specific protein
2
Q
How many genes are there in a human?
A
~30,000
3
Q
How many Genes may a cell express?
A
10,000-30,000
4
Q
What is the name of Genes that are expressed in all cells?
A
Housekeeping Genes
5
Q
What proportion of Genes are specific to cells?
A
~25%
6
Q
What are the main differences between DNA and RNA?
A
Ribose sugar instead of deoxyribose
Uracil instead of Thymine
Single stranded, not a double helix
7
Q
Name the 3 main classes of RNA
A
mRNA - Messenger
rRNA - Ribosomal
tRNA - Transfer
