Which cyclin protein is present throughout the majority of the cell cycle?
1) D
2) E
3) A
4) B
Answer: 1) D
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What are the three components of a DNA nucleotide?
A. A phosphate, a base, and a polypeptide B. A sugar, a phosphate, and a peptide C. A sugar, a base, and a polypeptide D. A sugar, a phosphate and a base
Graph B shows that breeding bird species
richness a. is greater than 1,000 at the equator. b. drops off in northern and southern latitudes. c. is less than that of ants at 30 degrees north latitude. d. drops by more than an order of magnitude at 40 degrees north latitude. e. includes all of these
Asbestos is a material that was once used extensively in construction. One risk from working in a building that contains asbestos is the development of asbestosis caused by the inhalation of asbestos fibers. Cells will phagocytize asbestos, but are not able to degrade it. As a result, asbestos fibers accumulate in _____.
A) mitochondria B) ribosomes C) peroxisomes D) lysosomes
The chemical 5-bromouracil mimics the chemical structure of thymine, making it a(n) (analog/nucleotide/precursor) of thymine.
Fill in the blank(s) with the appropriate word(s).