The shared genetic code of all life on Earth is evidence that ________
A) the genetic code arose relatively late in the history of life on Earth
B) DNA replication is error-free
C) all life shares a common ancestry
D) bacterial cells arose earlier than eukaryotic cells
C
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Imagine a region of DNA containing a VNTR that is found in the genome of koalas. The possible number of VNTR alleles in the population equals the number of:
A. genes. B. base pairs. C. times a gene is repeated in tandem along the DNA. D. times a short noncoding sequence is repeated in tandem along the DNA. E. restriction fragment length polymorphisms there are in the genome.
Which of the following is NOT a part of the mitotic spindle apparatus in plants?
A. centrosome B. centrioles C. tubulin proteins D. kinetochore microtubules E. astral microtubules
In the Ames test, any colonies that form on the control should be the result of spontaneous mutations
Indicate whether the statement is true or false
Repetitive noncoding DNA makes up approximately ___% of the human genome
a. 1 b. 10-15 c. 24 d. 50-55 e. 90-95