chromatin
What will be an ideal response?
contains cells chromosomes ; fibers of DNA ; stores information on synthesis of proteins
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Crossing over
a. generally results in binary fission. b. involves centrioles. c. involves breakages and exchanges between sister chromatids. d. results in new combinations of alleles being channeled into the daughter cells. e. does all of these.
Which of the following statements is TRUE about
anaphase? a. When sister chromatids separate, each is called a chromosome. b. Motor proteins drag chromosomes towards the poles. c. Some microtubules slide past each other, pushing the poles farther apart. d. Kinetochore microtubules shrink at both ends. e. All of these are true.
A three-base sequence (loop) in tRNA that is complementary to a three-base sequence in mRNA is
A. a codon B. an anticodon C. a promoter D. a terminator E. an amino acid attachment site
Which of the following chemicals acts as a mordant in the Gram stain procedure?
A) Crystal violet B) Iodine C) Ethyl alcohol D) Safranin