The condition that is characterized by the wearing-down of joints due to insufficient cartilage repair is called:a
osteitis.
b. osteoporosis.
c. osteopenia.
d. osteoarthritis.
e. osteon disease.
d
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Which of the following is a likely mechanism for gene dosage compensation?
A. One X chromosome of the female (XX) is inactivated. B. Two X chromosomes of a hermaphradite (XX) are transcribed at one-half the level of the single X chromosome of the male (XO). C. The single X chromosome of the male (XY) is transcribed at twice the level of the X chromosomes of the female (XX). D. All of the choices are correct.
Four of the five structures listed below belong to the
same system. Select the exception. a. heart b. spleen c. thymus d. tonsils e. lymph node
During DNA replication, DNA pol III synthesizes the lagging strand in segments, called
A. Chargaff's segments. B. replication fragments. C. replisomes. D. Okazaki fragments. E. repeating primers.
The primary value of the CRISPER-Cas system in biotechnology is ________
A) the removal of ineffective genes B) addition of random indels C) simple modifications of genomes D) rapid and cost-effective production of genetically modified organisms