The greatest single cause of blindness in the world is
A) neonatal gonorrheal ophthalmia.
B) keratoconjunctivitis.
C) trachoma.
D) inclusion conjunctivitis.
E) pinkeye.
C
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Scientists isolate cells in various phases of the cell cycle. They find a group of cells that have times more DNA than G1 phase cells. The cells of this group are _____
A) between the G1 and S phases in the cell cycle B) in the G2 phase of the cell cycle C) in the M phase of the cell cycle D) in the S phase of the cell cycle
A portion (location) of DNA that encodes a specific protein is a
Examine this image of chromosomes and identify the structural components.
A. kinetochore.
B. centromere.
C. chromatid.
D. chromosome.
E. gene.
The major relay station of the brain is the
a. thalamus. b. hypothalamus. c. midbrain. d. pons. e. medulla oblongata
A molecule or anything else that transports new genes into a cell is called a
a. vector. b. plasmid. c. restriction enzyme. d. bacterium.