The terminal ends or "tips" of a chromosome are called
A) genes. B) loci. C) chromatids. D) telomeres. E) centromeres.
D
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At the isoelectric pH of a tetrapeptide:
A) only the amino and carboxyl termini contribute charge. B) the amino and carboxyl termini are not charged. C) the total net charge is zero. D) there are four ionic charges. E) two internal amino acids of the tetrapeptide cannot have ionizable R groups
Why was the classification scheme devised by Linnaeus such an improvement over those used in his day?
What will be an ideal response?
What is the name of the pigment that captures photons during photosynthesis?
A) photonogene B) titanium dioxide C) chlorophyll D) melanin
The organelle responsible for the biosynthesis of proteins that are destined for secretion by the cell is the
A. mitochondria. B. endoplasmic reticulum. C. vesicle. D. lysosome. E. Golgi apparatus.