lesson 4 gene expression

Question 1

whats a gene and a genome

Answer 1

a gene is a specific sequence of DNA that encodes for a polypeptide or RNA molecule
a genome is an organisms total dna that is the complete genetic makeup

Question 2

what are the two processes in gene expression

Answer 2

transcription: a DNA sequence serves as a template for the synthesis of mRNA.
translation: an mRNA sequence serves as a template for the synthesis of protein.

Question 3

what are the genetic codes three important characteristics?

Answer 3

redundant: more than one codon can code for the same amino acid
continous: the code is read as a series of three letter codons
universal: Almost all organisms build proteins with the same genetic code.

Question 4

what are the three RNAs?

Answer 4

mRNA: the template for transcription
tRNA: the translation of mRNA
rRNA: the translation of mRNA.