Chamberlain University College of Nursing, BIOS 133,Understanding DNA and RNA: Key Concepts and Functions,

Question 1 point
Some scientists have proposed that the earliest forms of life may have existed in an "RNA World"
where RNA was both the genetic material and responsible for enzymatic activity. Imagine that you
have recreated such a life form. What would demonstrate that RNA, but not protein or DNA, is
necessary and sufficient for these functions?

QUESTION # option:

The organism lives and replicates despite RNase and DNase treatment, but the organism dies when
treated with protease.

The organism lives and replicates despite protease and DNase treatment, but the organism dies when
treated with RNase.

The organism lives and replicates despite protease treatment, but the organism dies when treated with
DNase and RNase.

The organism lives and replicates despite DNase treatment, but the organism dies when treated with
RNase and protease.

QUESTION # 2 points

What is a major difference between DNA polymerase I and DNA polymerase III?

QUESTION # option:

DNA polymerase I synthesizes DNA on leading strands and DNA polymerase III synthesizes DNA on
lagging strands

DNA polymerase I synthesizes DNA on lagging strands and DNA polymerase III synthesizes DNA on
leading strands

DNA polymerase I repairs DNA and DNA polymerase III synthesizes DNA in the 3‫ ׳‬to 5‫ ׳‬direction

DNA polymerase I synthesizes DNA in the 5‫ ׳‬to 3‫ ׳‬direction and DNA polymerase III synthesizes
on lagging strands

QUESTION # 3 1 / 1

points Frameshift mutations

occur when QUESTION # option:

bases are added or deleted

there is an amino acid

substitution there is a transition

substitution transversion

substitution




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