The condition shown in the photograph, xeroderma pigmentosum, is caused by dimerization of thymine bases when UV damage to DNA is not repaired. What mechanism exists to repair this kind of damage to DNA?
a. proofreading
b. nucleotide mismatch repair
c. nucleotide excision repair
d. phosphodiester substitution
c. nucleotide excision repair
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The use of the birth control pill increases the
risk for all of the following cancers except
a. breast. b. cervical. c. liver. d. ovarian. e. there is no exception
When going from a seated to standing position, the knee undergoes ____
a. flexion b. extension c. abduction d. adduction e. pronation
The comparison between the number of human genes and those of other animal species has led to many conclusions, including that _____
A) the density of the human genome is far higher than in most other animals B) the number of proteins expressed by the human genome is far more than the number of its genes C) most human DNA consists of genes for protein, tRNA, rRNA, and miRNA D) the genomes of most other organisms are significantly smaller than the human genome
The primary component of blood is
A. protein. B. white blood cells. C. water. D. salts.