MOLECULAR BASIS OF INHERITANCE

Question 1

putative genetic material

Answer 1

DNA

Question 2

structure of

Answer 2

DNA, RNA

Question 3

in any double stranded DNA a pair of nitrogenous bases is ?

Answer 3

base pair
eg- A and T
G and C

Question 4

base pair

Answer 4

1. human
2. e coli
3. lambda phage
4. ϕX147

Question 5

human- haploid
diploid

Answer 5

3.3 x 10^9 BP
6.6 x 10^9 BP

Question 6

e-coli (bacteria size is smaller)

Answer 6

4.6 x 10^6 BP

Question 7

lambda phage (ds DNA VIRUS)

Answer 7

48502 BP

Question 8

ϕX147 (ss )

Answer 8

5386 nucleotide (ss therefore only nucleotide )

Question 9

structure of nucleic acid (two types?)

Answer 9

DNA and RNA

Question 10

DNA and RNA present in all living organisms true or false?

Answer 10

true DNA is the genetic material and RNA is formed by it

Question 11

DNA and RNA present together in viruses true or false?

Answer 11

false in a virus tere is either DNA or RNA

Question 12

DNA has how many strands?

Answer 12

2 strands/ 2 polynucleotide chains
forms H bond between the 2 strands (2 degree structure )

Question 13

RNA has how many strands?

Answer 13

1 strand/ 1polynucleotide chain
and form H bond within itself by folding (1 degree structure )

Question 14

what is a polynucleotide chain

Answer 14

n x nucleotide

Question 15

components of nucleotide

Answer 15

1. sugar
2. nitrogenous base
3. phosphate

Question 16

sugar in nucleotide

Answer 16

5 C (pentose)
ribose- there is OH on 2nd carbon
deoxyribose- there is H on 2nd carbon

Question 17

nitrogenous bases in nucleotides

Answer 17

purines- 9 members
double ring
2 types- adenine- 6 amino purine
guanine- 2 amino, 6 oxo purine (keton)
pyrimidine- 6 members
single ring
3 types- uracil is :-2,4 dioxo pyrimidine
thymine is :-5 methyl uracil ( by methylation )
cytosin is:-4 amino uracil ( by amination )