The cells that line the intestine have highly folded plasma membranes on the absorptive surface of the intestine because 04.01Q 1.this will increase volume, making the cells more efficient. 2.this will increase surface area to volume ratio. 3.cells are in a hypotonic medium and they have shriveled up. 4.large amounts of plasma membrane will be needed for endocytosis.

The cells that line the intestine have highly folded plasma membranes on the absorptive surface of the intestine because 04.01A 1.this will increase volume, making the cells more efficient. 2.this will increase surface area to volume ratio. 3.cells are in a hypotonic medium and they have shriveled up. 4.large amounts of plasma membrane will be needed for endocytosis.

Answer: this will increase surface area to volume ratio. Explanation: These cells absorb materials directly through their membranes by diffusion (not endocytosis, which would require additional energy). The folding increases the rate of absorption by providing more surface area for diffusion. The cells that line the intestine have highly folded plasma membranes on the absorptive surface of the intestine because 04.01E

Which of the following would NOT be likely to travel through a nuclear pore? 1.Ribosome subunit 2.DNA 3.Protein 4.Ions 5.Sugars 04.02Q

Which of the following would NOT be likely to travel through a nuclear pore? 1.Ribosome subunit 2.DNA 3.Protein 4.Ions 5.Sugars 04.02A

04.02E Answer: DNA Explanation: DNA is excluded from traveling through the nuclear pore by “gatekeeper” molecules that line the pore, restricting the passage of molecules between the nucleus and cytoplasm. Which of the following would NOT be likely to travel through a nuclear pore?

1.a single-celled protozoan such as the Paramecium shown on the left 2.cell of the green plant Elodea 3.Streptococcus bacterial cell 4.a cell from a mushroom (a type of fungus) 5.a human heart muscle cell 04.03Q Which of the following cell types is unlike the others?

1.a single-celled protozoan such as the Paramecium shown on the left 2.cell of the green plant Elodea 3.Streptococcus bacterial cell 4.a cell from a mushroom (a type of fungus) 5.a human heart muscle cell 04.03A Which of the following cell types is unlike the others?

Answer: Streptococcus bacterial cell Explanation: All of the other choices are examples of eukaryotic cells; they have nuclei and other membrane-bound organelles. Bacterial cells, however, are prokaryotic and lack these organelles E Which of the following cell types is unlike the others?

Which of the following is correct about the genetic material of a prokaryotic cell? 04.04Q 1.The genetic material is DNA, stored in a nucleus. 2.The genetic material is RNA, stored in a nucleus. 3.The genetic material is DNA, stored in the nucleoid region. 4.The genetic material is RNA, stored in the nucleoid region.

Which of the following is correct about the genetic material of a prokaryotic cell? 04.04A 1.The genetic material is DNA, stored in a nucleus. 2.The genetic material is RNA, stored in a nucleus. 3.The genetic material is DNA, stored in the nucleoid region. 4.The genetic material is RNA, stored in the nucleoid region.

Answer: The genetic material is DNA, stored in the nucleoid region. Explanation: Both types of cells have both DNA and RNA, but the genetic information is stored in DNA. Eukaryotes enclose most of their DNA within a membrane-bound nucleus, while prokaryotic DNA is found in the cellular region called the nucleoid. Which of the following is correct about the genetic material of a prokaryotic cell? 04.04E

1.Large quantities of enzymes for biochemical processes are manufactured by that cell. 2.Membrane proteins and phospholipids are made to replace other membranous components in the cell. 3.Digestive enzymes for export are manufactured by that cell. 4.Membrane lipids are produced by that cell. 5.Large amounts of protein hormone are exported by the cell Q Which of the following would NOT be a logical conclusion about a cell that has large amounts of rough ER?

1.Large quantities of enzymes for biochemical processes are manufactured by that cell. 2.Membrane proteins and phospholipids are made to replace other membranous components in the cell. 3.Digestive enzymes for export are manufactured by that cell. 4.Membrane lipids are produced by that cell. 5.Large amounts of protein hormone are exported by the cell A Which of the following would NOT be a logical conclusion about a cell that has large amounts of rough ER?

04.05E Answer: Membrane lipids are produced by that cell. Explanation: The major function of the rough ER is the manufacture and transport of different types of proteins, such as membrane proteins, enzymes, or hormones. Membrane lipids are produced by the smooth ER. Which of the following would NOT be a logical conclusion about a cell that has large amounts of rough ER?

1.They are engulfed by plastids and stored until export from the cell is possible. 2.Defective parts accumulate until the cell dies. 3.Lysosomes assist in the removal of defective organelles by digesting them. 4.Ribosomes play a significant role in the removal of malfunctioning parts by absorbing the parts. 5.They are exported by exocytosis Q How does a cell rid itself of defective or malfunctioning organelles?

1.They are engulfed by plastids and stored until export from the cell is possible. 2.Defective parts accumulate until the cell dies. 3.Lysosomes assist in the removal of defective organelles by digesting them. 4.Ribosomes play a significant role in the removal of malfunctioning parts by absorbing the parts. 5.They are exported by exocytosis A How does a cell rid itself of defective or malfunctioning organelles?

Answer: Lysosomes assist in the removal of defective organelles by digesting them. Explanation: The primary function of the lysosome is digestion of intracellular particles. This includes the digestive destruction of organelles that no longer function so that their components can be reused by the cell E How does a cell rid itself of defective or malfunctioning organelles?

1.cell wall — support and protection 2.chloroplasts — chief site of cellular breakdown of sugars 3.nucleus — site of genetic control of information 4.ribosomes — site of protein synthesis 5.mitochondria — formation of ATP for the cell 04.07Q Which of the following relationships between cell structures and their respective functions is NOT correct?

1.cell wall — support and protection 2.chloroplasts — chief site of cellular breakdown of sugars 3.nucleus — site of genetic control of information 4.ribosomes — site of protein synthesis 5.mitochondria — formation of ATP for the cell 04.07A Which of the following relationships between cell structures and their respective functions is NOT correct?

04.07E Answer: chloroplasts — chief site of cellular breakdown of sugars Explanation: Mitochondria are the organelles responsible for cellular respiration. Chloroplasts are responsible for photosynthesis. Which of the following relationships between cell structures and their respective functions is NOT correct?

04.08Q Drugs that inhibit microtubules will 1.stop organelle movement. 2.inhibit cell division. 3.prevent the formation of new cilia and flagella. 4.kill the cell. 5.All of the above.

04.08A Drugs that inhibit microtubules will 1.stop organelle movement. 2.inhibit cell division. 3.prevent the formation of new cilia and flagella. 4.kill the cell. 5.All of the above.

Answer: All of the above. Explanation: Microtubules have many functions in the cell: they make up the structure of cilia and flagella, help to move some organelles within the cell, and form the spindle fibers that are crucial for chromosome separation during cell division. With these functions inhibited, the cell is likely to die E Drugs that inhibit microtubules will

1.a bacterium. 2.an animal, but not a plant. 3.a plant, but not an animal. 4.a plant or an animal. 5.any kind of organism Q A cell has the following molecules and structures: enzymes, DNA, ribosomes, plasma membrane, and mitochondria. It could be a cell from

1.a bacterium. 2.an animal, but not a plant. 3.a plant, but not an animal. 4.a plant or an animal. 5.any kind of organism A A cell has the following molecules and structures: enzymes, DNA, ribosomes, plasma membrane, and mitochondria. It could be a cell from

Answer: a plant or an animal. Explanation: The presence of mitochondria indicates that this cannot be a bacterial cell, but all of these structures can be found in eukaryotic cells – both plant and animal cells E A cell has the following molecules and structures: enzymes, DNA, ribosomes, plasma membrane, and mitochondria. It could be a cell from