Gene and the genetic code

Question 1

define gene ?

Answer 1

a section of DNA that contains the coded infromation for making polypeptides and functinalRNA

Question 2

what is where gene is located on DNA called?

Answer 2

locus

Question 3

give 3 features of the genetic code?

Answer 3

degenerate
universal
non overlapping

Question 4

explain dna being degenerate ?

Answer 4

most amino acids are coded for by more then one triplet

Question 5

how many amino acids are ther ?

Answer 5

20

Question 6

how many bases of DNA are their ?

Answer 6

4

Question 7

how many triplet codes are there?

Answer 7

64

Question 8

what does it mean that DNA is non overlapping ?

Answer 8

read in one particular direction along the strand and words in each base are only read once

Question 9

what a stop codon?

Answer 9

doesn’t code for any amino acid

Question 10

what does it mean that DNA is universal ?

Answer 10

code for same amino acids in all organisms .\indirect evidence for evolution

Question 11

what is an exon?

Answer 11

a sequence coding for an amino acid ?

Question 12

what is an intron ?

Answer 12

non coding sequence