Bio week 6

Chargaff determined that DNA from any source contains about the same amount of guanine as:

Cytosine

Which of the following statements concerning DNA is false?

DNA is a polymer of nucleotides

The bacteriophages used in Alfred Hershey's and Martha Chase's experiments showed that:

DNA was injected into bacteria

The process of DNA replication is conservative

False

X-ray diffraction images produced by ________ were used by Watson and Crick to infer the structure of DNA

Franklin

The DNA strand that replicated smoothly and continuously is called the:

Leading strand

Adenine and thymine are held together by two hydrogen bonds in a double stranded DNA molecule

True

Before the 1940s, scientist believed that proteins, rather than DNA, were the carriers of genetic material in the cell. Why?

Twenty different amino acids could produce a large number of unique conbinations.

In order to fit the X-ray crystallographic data, the two DNA strands must be ____ to each other.

antiparallel

In DNA replication, the lagging strand:

is synthesized as a series of Okazaki fragments