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The genetic instructions for a cell's functions are contained in the:


A) RNA in the chromosomes in the nucleus
B) RNA in the enzymes in the cytoplasm
C) DNA in the enzymes in the cytoplasm
D) DNA in the chromosomes in the nucleus

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The time between mitotic divisions,when the chromosomes duplicate themselves,is called:


A) cytokinesis
B) interphase
C) copyphase
D) cytogenesis

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A solution with the same salt concentration as cells is said to be:


A) hypertonic
B) hypotonic
C) isotonic
D) ginantonic

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If human cells are placed in a hypertonic solution,they will:


A) shrivel
B) swell and burst
C) remain the same
D) none of these

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Most human cells have ___ chromosomes,which is the ___ number.


A) 46/diploid
B) 23/haploid
C) 46/haploid
D) 23/diploid

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The process of phagocytosis is important to:


A) enable the kidneys to reabsorb water
B) enable WBCs to ingest pathogens
C) enable the kidneys to reabsorb small proteins
D) enable cells to take in glucose

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The engulfing of something by a moving cell is called:


A) pinocytosis
B) active transport
C) phagocytosis
D) facilitated diffusion

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The movement of molecules from an area of greater concentration to an area of lesser concentration is called:


A) active transport
B) diffusion
C) pinocytosis
D) filtration

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Which statement is NOT true of mitosis and meiosis?


A) Mitosis involves one division producing two cells.
B) Meiosis produces haploid cells.
C) Mitosis produces diploid cells.
D) Meiosis involves two divisions producing two cells.

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The nucleus is the control center of the cell because it contains:


A) all of the enzymes of the cell
B) DNA in the chromosomes
C) RNA to synthesize the DNA of the cell
D) RNA in the chromosomes

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Which statement is NOT true of human cells and solutions?


A) An isotonic solution has the same salt concentration as cells.
B) A hypotonic solution has a lower salt concentration than cells.
C) Human cells in a hypertonic solution will shrivel.
D) Human cells in a hypotonic solution will lose water.

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The process of filtration is important to:


A) form urine in the kidneys
B) enable cells to take in glucose
C) enable cells to take in small proteins
D) none of these

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Frequent mitosis is important to the body for all of these except:


A) production of new muscle cells
B) production of new RBCs
C) replacing the stomach lining
D) replacing the outer layer of skin

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The cell organelles that permit sperm cells to move are the:


A) flagella
B) lysosomes
C) cilia
D) microvilli

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The process of meiosis produces ___ cells,each with the ___ number of chromosomes.


A) 2/diploid
B) 2/haploid
C) 4/diploid
D) 4/haploid

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Mitosis involves ___ division(s) to produce ___ cells.


A) two/two
B) one/two
C) two/four
D) one/four

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The organic molecule in cell membranes that forms self antigens attached to proteins is:


A) glucose
B) cholesterol
C) phospholipids
D) oligosaccharides

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Which statement is NOT true of the cell organelles?


A) The Golgi apparatus synthesizes carbohydrates.
B) The endoplasmic reticulum synthesizes lipids.
C) The mitochondria synthesize ATP.
D) The proteasomes synthesize new ribosomes.

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In protein synthesis,the amino acids are brought to the mRNA by:


A) enzymes
B) ribosomes
C) DNA
D) tRNA

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Before mitosis can take place,what must happen?


A) The cytoplasm must begin to divide.
B) RNA must copy DNA to make new chromosomes.
C) DNA replication must create two sets of chromosomes.
D) Protein synthesis must make another set of chromosomes.

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