Patients with an abnormally long chromosome 9 have ____
a. the Philadelphia chromosome
b. a rare form of eye development
c. hemophilia
d. Down’s syndrome
e. a deletion mutation
ANSWER: a
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Match the skeletal muscle protein on the left with its function on the right.
A) myosin-binding protein at M line B) binds along the length of thin filaments C) major protein of sarcoplasmic reticulum D) attaches actin filaments to Z line E) mediates calcium regulation of contraction F) attaches actin to Z line G) links thick filaments to Z line H) major component of thin filaments I) major component of thick filaments J) links thin filament to Z line 1) actin 2) myosin 3) tropomyosin 4) troponin 5) titin 6) nebulin 7) myomesin 8) ?-actinin 9) Ca2+ ATPase 10) CapZ
In the Hardy-Weinberg equation, 2pq refers to
A) the proportion of heterozygotes in a population. B) the number of homozygous dominant individuals in a population. C) the most common phenotype in a population. D) individuals who are homozygous recessive.
Which of the following states that changes in species composition are orderly and predictable during succession?
1.The facilitation hypothesis
2.The inhibition hypothesis
3.The tolerance hypothesis
DNA strands can be clipped crosswise at selected positions by using enzymes called
A. DNA polymerases. B. ligases. C. palindromes. D. reverse transcriptases. E. restriction endonucleases.