Exam 8: DNA Structure and Chromosomal Organization

X-ray crystallography revealed several important features of the shape of DNA. Which one of the following facts about DNA was NOT revealed by X-ray crystallography?

The sugar found in DNA is a ____________________.

Cytosine and thymine are the two types of bases found in DNA known as ______________________.

The base found in DNA, but not RNA, is ____________________; the base found in RNA, but not DNA, is ____________________.

What is the significance of hydrogen bonds in the shape of biological molecules?

RNA molecules have two definably different ends: a head (the 5') and a tail (the 3'). Do DNA molecules similarly have head and tail ends? Why or why not?

A ____________________ is made up of a sugar, a phosphate, and a nitrogenous base.

The type of chemical bond that holds together adenine and thymine in the middle of a DNA molecule is a ________________ bond.

The name of the enzyme that replicates DNA is ____________________.

What is the current status of DNA vaccines?

The basic unit of a DNA molecule is the

Describe the chemical composition and structure of DNA.

Chromatin is an extraction of pure DNA.

The type of chemical bond that connects the sugars and phosphates together in a DNA molecule is a _______________ bond.

To make a DNA vaccine against SARS, what type of genes were used?

The woman scientist who made a major contribution to the discovery of the structure of DNA was _____________________.

What is the percentage of individuals who died after contracting the SARS virus?

The disease SARS is spread by ______.

The unit structure of chromatin is the ____________________, which is made up of ____________________ types of ____________________ proteins complexed with DNA.

____________________ proteins function in the packaging of DNA in the chromosome.