A closed-circular DNA in its relaxed form has a linking number (Lk) of 500 . What will happen to the linking number of this molecule if one of the strands is broken?
A. Lk will increase.
B. Lk will decrease.
C. Lk will stay the same.
D. Lk becomes undefined.
E. None of these choices is correct.
D
You might also like to view...
Which of the following occurs to transmit signals from one neuron to another?
a. Electrical signals cross the synapse. b. An action potential jumps the synapse. c. ATP starts an action potential in the postsynaptic cell. d. The presynaptic cell releases a neurotransmitter
Genetic manipulation has enabled chestnut trees to
a. develop resistance to a blight. b. develop resistance to insects. c. flower earlier in the season. d. grow faster
What is the most abundant tissue type in the
human body?
a. connective b. muscular c. epithelial d. neural e. adipose
A scientist performs a controlled experiment. This means that
A) the experiment is repeated many times to ensure that the results are accurate. B) the experiment proceeds at a slow pace to guarantee that the scientist can carefully observe all reactions and process all experimental data. C) two versions of the experiment are conducted, one differing from the other by only a single variable. D) one experiment is performed, but the scientist controls the variables.