Question

Assume you found life in Mars. If the Martian genetic code used the nucleotide "A" as a spacer, and then the nucleotides T, C and G in triplers, how many different codons would be available?

a) 3 b) 4 c) 8 d) 9 e) 12 f) 20 g) 27 h) 30 i) 64

would be purine rich (AG rich) d) Actually, it would be pyrimidine rich (TC rich) __17. Rosalind Franklin received the Nobel Prize for: a generating X-ray crystallographic data of the DNA structure b) establishing that DNA replication is semiconservative c) solving the structure of DNA d) showing that DNA is the genetic material e) showing that the amount of A equals the amount of T f) She did not receive the Nobel Prize он - 18. Regarding the following: HOCHZ HOCH o ĆIĆ H I H HI се с н Hċċ H 0U-I OH он н a) The first is ribose for RNA b) The first is deoxyribose for RNA c) The first is ribose for DNA d) The first is deoxyribose for DNA 19. Assume you found life in Mars. If the Martian genetic code used the nucleotide "A" as a spacer, and then the nucleotides T, C and G in triplets, how many different codons would be available? a) 3 b)4 c) 8 d) 9 e) 12 )20 g) 27 h) 301) 64

Answer 1

As per given information in Q19:

If 'A' as spacer and nucleotide T, C and G are in triplets then number of codons would be available are :

Number of codons= (number of nucleotide) ³

For T, C and G (since no. of nucleotide are 3 )= 3³ = 27.

For A, T, C and G ( since no. of nucleotide are 4)= 4³ = 64.