Why does DNA synthesis proceed in a 5? to 3? direction?
a. DNA polymerases can only add nucleotides to the 3? end of a polynucleotide strand.
b. The 3? end of the polynucleotide molecule contains more phosphates than the 5? end.
c. DNA unzips in the 5’ to 3’ direction.
d. DNA strands are parallel to each other.
e. Chromosomes are aligned in the 5? to 3? direction in the nucleus.
a
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Which of the following is not true of the site-specific recombination reaction catalyzed by tyrosine-class recombinases?
A. One recombinase subunit becomes covalently linked to the DNA through a phosphotyrosine bond. B. The overall reaction proceeds with a minimal free-energy change. C. The overall reaction requires four unique cleavage events. D. Isomerization of the Holliday intermediates includes branch migration through the core sequence. E. All of the choices given are true.
Answer the following statements true (T) or false (F)
1. A simple dot matrix is the best method to identify homologous sequences from a known sequence. 2. If a gene's sequence is compared among several different vertebrates and they are found to be 95% homologous, one can assume that the genes are derived from the same ancestral gene. 3. Sequences that are alike will produce a horizontal line in a dot matrix analysis. 4. The current genome databases are biased towards species that are important from a research, medical, or agricultural perspective.
Mitotic Cdk phosphorylates DNA repair proteins to prevent joining of ________ during mitosis
Fill in the blank with correct word.
While the preservation of a landscape is often intended for one particular organism, often times other species will also benefit.
Answer the following statement true (T) or false (F)