During which phase of meiosis will the
chromosomes appear as packets of four chromatids?
a. anaphase I
b. telophase II
c. anaphase II
d. prophase I
e. metaphase II
Answer: d
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Structures in an organism that have no current function are referred to as ____
a. homologous b. vestigial c. mutualistic d. fossils e. convergent
Which of the following is actively transcribed?
A. euchromatin B. heterochromatin C. nucleosomes
Because so few bacteria can be grown easily in culture but all of them contain DNA, molecular techniques like PCR and SSU rRNA are used to be able to identify and quantify microorganisms as a "census" for diversity.
Answer the following statement true (T) or false (F)
Genes in eukaryotic cells often have intronic sequences coded for within the DNA. These sequences are ultimately not translated into proteins. Why?
(a) Intronic sequences are removed from RNA molecules by the spliceosome, which works in the nucleus. (b) Introns are not transcribed by RNA polymerase. (c) Introns are removed by catalytic RNAs in the cytoplasm. (d) The ribosome will skip over intron sequences when translating RNA into protein.