Which type of cytoskeletal fiber is important in the function of nuclear lamina?
A. microfilaments
B. intermediate filaments
C. microtubules
D. fibronectin
Ans: B. intermediate filaments
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True or false: Many mutations are detrimental to organisms that acquire them, but other mutations are beneficial and drive evolution of that species
A. true B. false
What is the name of the microtubule structure that brings about chromosomal movement during nuclear division?
A) Mitotic spindle B) Cell membrane C) Centromere D) Sister chromatid
Which of the following statements about fragile X syndrome is not correct?
a. It results in learning and attention disabilities in males. b. It results in hyperactivity in males. c. The location of the fragile X site is exactly the same in all of an individual's cells. d. It results in the formation of shorter-than-normal sequences of CGG. e. Females are usually heterozygous and are therefore more likely to have a normal phenotype.
Activation of translation after fertilization occurs by
a. synthesis of new mRNAs. b. uptake of amino acids into the fertilized egg. c. binding of an activator protein to the 5? untranslated region. d. elongation of poly-A tails on mRNAs.