Which of these statements concerning the centromere is NOT true?
A) It anchors proteins to DNA.
B) It is temporary.
C) It is the attachment site for microtubules.
D) It appears to join duplicated DNAs.
E) Its position along the chromosome varies.
A
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The frequency of the allele that causes sickle cell disease is higher in some populations than in others because
A) the gene mutates at different frequencies in different parts of the world. B) the incidence of malaria differs in different parts of the world. C) sickle cell disease screening is better in developed countries. D) heterozygotes are resistant to cholera.
Unlike eudicot roots, the center of most monocot roots is occupied by the:a
cortex. b. pith. c. phloem. d. vascular cambium. e. xylem.
Mutualism is a relationship
A) that sometimes provides benefits for both members such that one or both parties cannot live without the other. B) where only one member derives benefit from the other. C) where one member of the relationship may kill the other. D) where one member of the relationship benefits without hurting the other. E) where it is difficult to prove the benefits or disadvantages one member of the relationship may provide for the other.
How is methylation of DNA maintained following DNA replication?
What will be an ideal response?