Storing and using genetic information Flashcards Preview

Principles of disease JK > Storing and using genetic information > Flashcards

Flashcards in Storing and using genetic information Deck (17):
1

Phenotype

Outward physical manifestation of organism

2

Genotype

Full hereditary information of organism

3

DNA

Right handed double helix

4

Nucleotide monomer

2- deoxyribose sugar
Base
Phosphate group

5

Nucleus

5-10 micrometres with 1/4 RNA production

6

Histone proteins

H1, H2a, H2b, H3, H4

7

Heterochromatin

Condensed

8

Euchromatin

Loose

9

DNA replication is

Semi conservative and bi directional

10

How can histones be modified to separate DNA strands?

Enzymatically modified
Displaced by chromatin remodelling complexes

11

When are chromosomes seen easiest?

Metaphase

12

Exons

Coding regions

13

Introns

Non coding regions

14

Explain the degeneracy of the genetic code

All amino acids except methionine and tryptophan are encoded by more than 1 codon

15

mRNA

Transcribed from DNA in nucleus and carries information for protein synthesis

16

What allows many proteins to be made?

Alternative splicing
Reading frame

17

Where is rRNA produced?

Nucleus