Sites in the genome that are more susceptible to mutations are called:
A. mutation spots.
B. hotspots.
C. risk factors.
D. genes.
E. noncoding DNA.
B
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A ribonucleoprotein is:
A. an enzyme that degrades RNA. B. an RNase that functions in the nucleus. C. a nucleotide-transport protein. D. a noncoding RNA complexed with protein.
The selective permeability of a membrane refers to ____
a. the movement of a molecule from an area of greater concentration to an area of lesser concentration. b. the ability of a substance to pass through a membrane c. the ability of only certain molecules to pass across a membrane d. the need for carrier proteins to transport some molecules e. the ability of molecules to be transported across the membrane only certain times of the day
Dietary treatment of galactosemia
A. need not begin until one or two months after birth. B. requires a low protein diet. C. can be discontinued by the age 10?12. D. completely eliminates symptoms of the disease. E. none of these.
Human Hox genes are in four clusters: HOXA, HOXB, HOXC, and HOXD, for a total of 39 genes. Besides conserving the clustering of genes, evolution has also conserved __________
A) their chromosomal locations B) the order of the genes within them C) their expression along the dorsal-ventral axis D) the mutations to which they give rise E) their bilateral symmetry