Nucleic Acids

Write the names and schematic representations of all the possible dipeptides formed from alanine, glycine and tyrosine.

Draw a neat diagram for the following:

One purine base from nucleic acid.

Draw the neat diagram for the following:

dAMP

Draw a neat diagram of the following:

AMP.

Draw structural formulae of nucleosides formed from the following sugar and base.

D-2-deoxyribose and thymine

Draw structural formulae of nucleosides formed from the following sugar and base.

D -ribose and guanine

Write the sequence of the complementary strand for the following segments of a DNA molecule.

$\mathrm{a}. 5\text{'}-\mathrm{CGTTTAAG}-3\text{'}5\text{'}-\mathrm{CGTTTAAG}-3\text{'}$

$\mathrm{b}. 5\text{'}-\mathrm{CCGGTTAATACGGC}-3\text{'}$

Answer the following:

Some of the following statements apply to DNA only, some to RNA only and some to both. Lable them accordingly.
a. The polynucleotide is double stranded. ( …………… )
b. The polynucleotide contains uracil. ( …………… )
c. The polynucleotide contains D-ribose ( …………… ).
d. The polynucleotide contains Guanine ( …………… ).

Give scientific reasons:

On complete hydrolysis DNA gives equimolar quantities of adenine and thymine.

What is the single term that answers all the following questions?

• What decides whether you are blue eyed or brown eyed?
• Why does wheat grain germinate to produce wheat plant and not rice plant?
• Which acid molecules are present in nuclei of living cells?

What is the genetic material of organisms?