3.4.1 DNA, genes and chromosomes

Question 1

prokaryotic vs eukaryotic cell dna

and which two organelle have dna

Answer 1

prokaryotic
short, circular, not associate with protein
eukaryotic
long, linear, associated with protein (histones)
DNA molecule + histone = chromosome

Mitochondria and chloroplast (same as prokaryotic)

Question 2

what is a gene base sequence use to code for?

Answer 2

the amino acid sequence of a polypeptide
a functional RNA (rRNA and tRNA))

Question 3

Definition of a gene

Answer 3

A section of DNA with a specific base sequence that code for a specific protein (polypeptide) with particular function

Question 4

Definition of locus

Answer 4

A certain gene is found at a particular location / position of the DNA molecule

Question 5

definition of universal genetic code

Answer 5

Every organism have gene made of DNA

Question 6

Definition of degenerate code

Answer 6

More than one triplet code for the same/ each/ single amino acid

Question 7

Definition of non overlapping triplet

Answer 7

Each base is part of only one triplet

Question 8

transformation from pre mRNA to mature mRNA

Answer 8

Exon: code for polypeptide
Intron : no

splicing
remove introns