Chromosomes, DNA and the RNA

_______________________is the organization of the chromosomes according to their shape and size.

___________________ is the product of thickened chromatin.

___________________ are only seen when the cell is going to divide.

____________________is a unit composed of one nitrogenous base, a deoxyribose and a phosphate group.

___________________ is a piece of DNA that codes for a specific trait or protein.

___________________ and _____________________ are the purines. They have ____ rings.

______________________is the beadlike structure made of DNA wrapped around eight histones.

The _________________is the name of the DNA monomer.

Which of the following nucleotide(s) bond(s) with adenine?

• a. Thymine only

• b. Guanine only

• c. Thymine and Uracil

• d. Thymine, Uracil and Cytosine

The “backbone” of the DNA molecule is made up of two components, what are these?

• the phosphate group & a nitrogenous base

• the phosphate group & the sugar

• the sugar and a nitrogenous base

• the sugar, the phosphate group & the nitrogenous base