Please answer all questions

1			Cells lacking nucleoli would likely have
			A)	few ribosomes.
			B)	few mitochondria.
			C)	no DNA.
			D)	no centrioles.
2			Which component of the cell membrane is primarily responsible for restricting the movement of molecules through the membrane?
			A)	Carbohydrates.
			B)	Phospholipids.
			C)	Proteins.
			D)	All are equally effective in this role.
3			Solutes are nonspecifically taken into the cell by
			A)	exocytosis.
			B)	receptor-mediated endocytosis.
			C)	phagocytosis.
			D)	pinocytosis.
4			Cells lacking lysosomes would be
			A)	unable to synthesize proteins.
			B)	unable to divide.
			C)	unable to commit apoptosis.
			D)	unable to move.
5			Which of the following organelles contain DNA?
			A)	Centrioles.
			B)	Golgi apparatus.
			C)	Endoplasmic reticulum.
			D)	Mitochondria.
6			Which of the following is not true of DNA?
			A)	It exists as a double-stranded helix.
			B)	It contains uracil and cytosine.
			C)	It contains guanine and adenine.
			D)	None of the above.
7			Precursor messenger RNA is
			A)	longer than messenger RNA.
			B)	is shorter than messenger RNA.
			C)	is produced in the cytosol.
			D)	is produced by the process of translation.
8			Protein synthesis requires
			A)	messenger RNA.
			B)	ribosomal RNA.
			C)	transfer RNA.
			D)	all of the above.
9			Telomeres
			A)	are found in the middle of chromosomes.
			B)	contain tumor suppressor genes.
			C)	decrease in length when cells replicate.
			D)	are long repeated sequences of DNA.
10			During the cell cycle
			A)	DNA is replicated during mitosis.
			B)	centrioles replicate during G1.
			C)	sister chromatids separate during metaphase.
			D)	nucleoli disappear during anaphase.
11			Meiosis
			A)	occurs only in the gametes.
			B)	allows for genetic recombination.
			C)	produces haploid cells.
			D)	all of the above.
12			During mitosis
			A)	chromosomes align at the cell equator during prophase.
			B)	nuclear membranes reform during anaphase.
			C)	spindle fibers are produced during prophase.
			D)	centromeres split during telophase.