Common 8 review

Which of the following are useful characteristics of the pea plant in Mendel's experiment?

• small and grows easily

• produces many offspring

• all of the above

Mendel chose the 7 characteristic of the pea plant because

• there are two clearly different forms with no intermediate forms.

• they are easily observable.

• both (a) and (b)

In 1928, the experiments of Griffith demonstrated transformation of

• S bacteria into R bacteria.

• heat-killed S bacteria into R bacteria.

• S bacteria into heat-killed R bacteria.

In 1952, Hershey and Chase used the bacteriophage T2 to determine that genetic material is made of which of the following?

• protein

• DNA

• 35S

A microorganism that is virulent is

• able to cause disease.

• transformed.

• harmless.

Avery's experiments showed that

• DNA is responsible for transformation.

• proteins are responsible for transformation.

• bacteriophages are responsible for transformation.

Hershey and Chase injected phages with

• S bacteria.

• radioactive isotopes.

• vaccines.

Hershey and Chase found that T2 bacteriophages

• inject their DNA into host cells.

• keep most of their viral proteins outside the host cell.

• All of the above

In 1953, Watson and Crick built a model of DNA with the configuration of a

• triple helix.

• double helix.

• circle.

Which of the following researchers took key photographs of DNA?

• Watson

• Franklin and Wilkins

• Crick