Which of the following represents the highest level of chromosome condensation?
A. Radial loop domain
B. 30 nm fibers
C. Double helix
D. Nucleosome
E. Heterochromatin
E
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Images of unreplicated chromosomes that allow researchers to organize and identify each chromosome, as well as missing or extra chromosomes is called a(n) ________.
A. amniocentesis B. caricature C. chorionic villus sampling (CVS) D. karyotype
Which of the following is an example of dendrochronology?
A) measuring seedling recruitment B) counting juveniles in a population C) measuring finger bone size over time D) counting tree rings
Peptidyl transferase and other proteins power the continuous progression of the ribosome along mRNA and catalyze what type of bond formation in the growing polypeptide chain?
What will be an ideal response?
In 1858, a German scientist named Rudolph Virchow stated that spontaneous generation of living things from nonliving matter was impossible. This statement contributed to the development of the cell theory. In effect, what was Virchow saying?
A) Cells exist in a wide variety of shapes and sizes. B) All cells come from existing cells. C) The cell is the basic unit of all organisms. D) Cells are alive.