How many chromatids would you expect to find in a dividing diploid cell whose haploid number is 5 at that stage of the mitotic cycle when the nuclear membrane disappears?

What will be an ideal response?


20

Biology & Microbiology

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Which of the following is NOT a part of the MAP kinase pathway? (Select all correct choices.)

A. A receptor kinase is activated by binding to a growth factor and phosphorylates receptor cytoplasmic domains. B. The activated receptor kinase dimer activates the RAS protein to bind to a GTP. C. The activated RAS protein activates protein kinases in the signal-transduction pathway. D. A series of protein kinases amplify the signal to the nucleus where genes responsible for cell division are switched on. E. A pyrophosphatase enzyme terminates the cellular response.

Biology & Microbiology

A sudden reduction in population size generally results in

a. extinction. b. mutation. c. speciation. d. genetic drift. e. natural selection.

Biology & Microbiology

In which one of the following ways do prokaryotic cells differ from eukaryotic cells?

A) Prokaryotic cells have a plasma membrane composed entirely of protein. B) Prokaryotic cells lack a membrane-bound nucleus and other membranous organelles. C) Prokaryotic cells lack DNA, RNA, and ribosomes. D) Prokaryotic cells have cytoplasm that is bounded by a cell membrane. E) Prokaryotic cells have cytoplasm but lack a cell membrane.

Biology & Microbiology

The condensation reaction that forms nucleic acid polymers occurs between a _____ group on one nucleotide and a _____ group on a second nucleotide.

A) nitrogenous base, nitrogenous base B) phosphate, hydroxyl C) carbon, carbon D) nitrogenous base, sugar

Biology & Microbiology