Progeria is a rare form of premature aging cause by defects in which of the foll

Question

Progeria is a rare form of premature aging cause by defects in which of the following cytoskeletal elements? A) Lamin proteins B) Gamma tubulin ring complex C) Kinesis motor protein D) ArP 2/3 complex Which of the following statements about actin myosin dependent muscle contraction is false? A) Binding of myosin to actin is disrupted by ATP binding to myosin B) Muscle relaxation results in shortening of the sarcomere C) The globular head of myosin bind actin D) ATP hydrolysis causes a conformational change in myosin Which of the following is not an example of a connective tissue? A) Bone B) Adipose tissue C) Epithelial tissue D) Cartilage Loss of intermediate filaments will result in which of the following? A) Progeria B) Weakening of the axons of neurons C) Epidermolysis bullosa D) All of the above A double pass transmembrane protein transported into the endoplasmic reticulum will have many transfer sequences A) 3 B) 0 C) 1 D) 2 Loss of Rab protein an

Explanation / Answer

11. A

12. A

13. C

14. D

15. D

16. D

Progeria is an extremely rare genetic disorder in which symptoms resembling aspects of aging are manifested at a very early age.Progeria is one of several progeroid syndromes.[7] Those born with progeria typically live to their mid teens to early twenties.It is a genetic condition that occurs as a new mutation, and is rarely inherited, as carriers usually do not live to reproduce. Although the term progeria applies strictly speaking to all diseases characterized by premature aging symptoms, and is often used as such, it is often applied specifically in reference to Hutchinson–Gilford progeria syndrome (HGPS).

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